Publications

Please have also a look at my Researcher ID

List of papers

    2017

  1. P. Adelhardt, J. Gritsch, M. Hille, D.A. Reiss, K.P. Schmidt
    Quantum phase transitions to topological Haldane phases in spin-one chains studied by linked-cluster expansions
    [abstract] [abstract] [pdf] cond-mat [arXiv:1710.03105]
  2. Tao Hong, M. Matsumoto, Y. Qiu, W. Chen, T.R. Gentile, S. Watson, F.F. Awwadi, M.M. Turnbull, S.E. Dissanayake, H. Agrawal, R. Toft-Petersen, B. Klemke, K. Coester, K.P. Schmidt, D.A. Tennant
    Direct observation of the Higgs amplitude mode in a two-dimensional quantum antiferromagnet near the quantum critical point
    Nature Physics 13, 638 (2017)
    DOI:10.1038/nphys4182
    [abstract] [abstract] [pdf] cond-mat [arXiv:1705.06172]
  3. M. Powalski, K.P. Schmidt, and G.S. Uhrig
    Mutually attracting spin waves in the square-lattice quantum antiferromagnet
    [abstract] [abstract] [pdf] cond-mat [arXiv:1701.04730]
  4. M. Malki and K.P. Schmidt
    Magnetic chern bands and triplon Hall effect in an extended Shastry-Sutherland model
    Physical Review B 95, 195137 (2017)
    DOI: [10.1103/PhysRevB.95.195137]
    [abstract] [abstract] [pdf] cond-mat [arXiv:1703.03566]
  5. Tao Hong, Y. Qiu, M. Matsumoto, D. A. Tennant, K. Coester, K. P. Schmidt, F. F. Awwadi, M. M. Turnbull, H. Agrawal, and A. L. Chernyshev
    Field-induced spontaneous quasiparticle decay and renormalization of quasiparticle dispersion in a quantum antiferromagnet
    Nature Communications 8, 15148 (2017)
    DOI:10.1038/ncomms15148
    [abstract] [ps] [pdf] cond-mat [arXiv:1608.08172]
  6. S. Ward, P. Bouillot, C. Kollath, T. Giamarchi, K.P. Schmidt, B. Normand, K.W. Krämer, D. Biner, R. Bewley, T. Guidi, M. Boehm, D.F. McMorrow, Ch. Rüegg
    Bound states and field-polarized Haldane modes in a quantum spin ladder
    Physical Review Letters 118, 177202 (2017), Editors Suggestion
    DOI: [10.1103/PhysRevLett.118.1772021]
    [abstract] [ps] [pdf] cond-mat [arXiv:1609.00198]
  7. S. Sahin, K.P. Schmidt, and R. Orus
    Entanglement Continuous Unitary Transformations
    European Physics Letters 117, 20002 (2017)
    DOI: [10.1209/0295-5075/117/20002]
    [abstract] [ps] [pdf] cond-mat [arXiv:1607.04645]
  8. T. Sikkenk, K. Coester, L. Fritz, and K.P. Schmidt
    Emergence of a 2d macro-spin liquid in a highly frustrated 3d quantum magnet
    Physical Review B 95, 060401 (R) (2017)
    DOI: [10.1103/PhysRevB.95.060401]
    [abstract] [ps] [pdf] cond-mat [arXiv:1602.05983 ]
  9. 2016

  10. J. Roechner, L. Balents, and K.P. Schmidt
    Spin liquid and quantum phase transition without symmetry breaking in a frustrated three-dimensional Ising model
    Physical Review B 94, 201111 (R) (2016)
    DOI: [10.1103/PhysRevB.94.201111]
    [abstract] [ps] [pdf] cond-mat [arXiv:1609.00484]
  11. D. Ixert and K.P. Schmidt
    Non-perturbative linked-cluster expansions in long-range ordered quantum systems
    Physical Review B 94, 195133 (2016)
    DOI: [10.1103/PhysRevB.94.195133]
    [abstract] [ps] [pdf] cond-mat [arXiv:1608.05618]
  12. S. Fey and K.P. Schmidt
    Critical behavior of quantum magnets with long-range interactions in the thermodynamic limit
    Physical Review B 94, 075156 (2016)
    DOI: [10.1103/PhysRevB.94.075156]
    [abstract] [ps] [pdf] cond-mat [arXiv:1606.05111]
  13. K. Coester, D.G. Joshi, M. Vojta, and K.P. Schmidt
    Linked-cluster expansions for quantum magnets on the hypercubic lattice
    Physical Review B 94, 125109 (2016)
    DOI: [10.1103/PhysRevB.94.125109]
    [abstract] [ps] [pdf] cond-mat [arXiv:1605.05848]
  14. K. Coester and K.P. Schmidt
    Extracting critical exponents for sequences of numerical data via series extrapolation techniques
    Physical Review E 94, 022101 (2016)
    DOI: [10.1103/PhysRevE.94.022101]
    [abstract] [ps] [pdf] cond-mat [arXiv:1604.01988]
  15. D.A. Schneider, K. Coester, F. Mila, and K.P. Schmidt
    Pressure dependence of the magnetization plateaus of SrCu_2(BO_3)_2
    Physical Review B 93, 241107 (R) (2016)
    DOI: [10.1103/PhysRevB.93.241107]
    [abstract] [ps] [pdf] cond-mat [arXiv:1601.00793 ]
  16. 2015

  17. D. Ixert, T. Tischler, and K.P. Schmidt
    Non-perturbative linked-cluster expansions for the trimerized ground state of the spin-one Kagome Heisenberg model
    Physical Review B 92, 174422 (2015)
    DOI: [10.1103/PhysRevB.92.174422]
    [abstract] [abstract] [pdf] cond-mat [arXiv:1508.05200 ]
  18. K. Coester and K.P. Schmidt
    Optimizing linked cluster expansions by white graphs
    Physical Review E 92, 022118 (2015)
    DOI: [10.1103/PhysRevE.92.022118]
    [abstract] [abstract] [pdf] cond-mat [arXiv:1505.02975 ]
  19. M. Powalski, G.S. Uhrig, and K.P. Schmidt
    Roton minimum as fingerprint of magnon-Higgs scattering in ordered quantum antiferromagnets
    Physical Review Letters 115, 207202 (2015)
    DOI: [10.1103/PhysRevLett.115.207202]
    [abstract] [abstract] [pdf] cond-mat [arXiv:1504.07371 ]
  20. Kai Phillip Schmidt und Simon Trebst
    Topologische Spinflüssigkeiten
    Physik Journal 04/2015
  21. K. Coester, S. Clever, F. Herbst, S. Capponi, and K.P. Schmidt
    A generalized perspective on non-perturbative linked cluster expansions
    European Physics Letters 110, 20006 (2015), Editors choice
    DOI: [doi:10.1209/0295-5075/110/20006]
    [abstract] [abstract] [pdf] cond-mat [arXiv:1409.5007 ]
  22. D.G. Joshi, K. Coester, K. P. Schmidt, and Matthias Vojta
    Non-linear bond-operator theory and 1/d expansion for coupled-dimer magnets I: Paramagnetic phase
    Physical Review B 91, 094404 (2015)
    DOI: [10.1103/PhysRevB.91.094404]
    [abstract] [abstract] [pdf] cond-mat [arXiv:1407.7870 ]
  23. 2014

  24. D. Ixert, F.F. Assaad, and K.P. Schmidt
    Mott physics in the half-filled Hubbard model on a family of vortex-full square lattices
    Physical Review B 90, 195133 (2014)
    DOI: [10.1103/PhysRevB.90.195133]
    [abstract] [abstract] [pdf] cond-mat [arXiv:1408.0022 ]
  25. T. Verkholyak, J. Strecka, F. Mila, and K.P. Schmidt
    Exact ground states of a spin-1/2 Ising-Heisenberg model on the Shastry-Sutherland lattice in a magnetic field
    Physical Review B 90, 134413 (2014)
    DOI: [10.1103/PhysRevB.90.134413]
    [abstract] [abstract] [pdf] cond-mat [arXiv:1407.8229 ]
  26. G.R. Foltin, S.R. Manmana, and K. P. Schmidt
    Exotic magnetisation plateaus in a quasi-2D Shastry-Sutherland model
    Physical Review B 90, 104404 (2014)
    DOI: [10.1103/PhysRevB.90.104404]
    [abstract] [abstract] [pdf] cond-mat [arXiv:1405.3260 ]
  27. Tao Hong, K. P. Schmidt, K. Coester, F. F. Awwadi, M. M. Turnbull, Y. Qiu, J. A. Rodriguez-Rivera, M. Zhu, X. Ke, C. P. Aoyama, Y. Takano, Huibo Cao, W. Tian, J. Ma, R. Custelcean, H. D. Zhou, and M. Matsuda
    Magnetic ordering induced by interladder coupling in the spin-1/2 Heisenberg two-leg ladder antiferromagnet C9H18N2CuBr4
    Physical Review B 89, 174432 (2014)
    DOI: [10.1103/PhysRevB.89.174432]
    [abstract] [abstract] [pdf] cond-mat [arXiv:1405.6748 ]
  28. S. Capponi, S.S. Jahromi, F. Alet, and K. P. Schmidt
    Baxter-Wu model in transverse magnetic field
    Physical Review E 89, 062136 (2014)
    DOI: [10.1103/PhysRevE.89.062136]
    [abstract] [abstract] [pdf] cond-mat [arXiv:1403.1406 ]
  29. M. D. Schulz, S. Dusuel, G. Misguich, K. P. Schmidt, and J. Vidal
    Ising Anyons with a string tension
    Physical Review B 89, 201103(R) (2014)
    DOI: [10.1103/PhysRevB.89.201103]
    [abstract] [abstract] [pdf] cond-mat [arXiv:1401.1033 ]
  30. M. Kamfor, S. Dusuel, J. Vidal, and K.P. Schmidt,
    Spectroscopy of a topological phase
    Physical Review B 89, 045411 (2014)
    DOI: [10.1103/PhysRevB.89.045411]
    [abstract] [pdf] cond-mat [arXiv:1308.6150]
  31. 2013

  32. Y. H. Matsuda, N. Abe, S. Takeyama, H. Kageyama, P. Corboz, A. Honecker, S. R. Manmana, G. R. Foltin, K. P. Schmidt, F. Mila,
    Magnetization of SrCu2(BO3)2 in ultrahigh magnetic fields up to 118 T
    Physical Review Letters 111, 1137204 (2013)
    DOI: [doi:10.1103/PhysRevLett.111.137204]
    [abstract] [pdf] cond-mat [arXiv:1308.4151]
  33. K. Coester, W. Malitz, S. Fey, and K.P. Schmidt,
    Quantum disorder and local modes of the fully-frustrated transverse field Ising model on a diamond chain
    Physical Review B 88, 184402 (2013)
    DOI: [10.1103/PhysRevB.88.184402]
    [abstract] [pdf] cond-mat [arXiv:1308.1803]
  34. S.S. Jahromi, S Farhad Masoudi, M. Kargarian, and K.P. Schmidt,
    Quantum phase transitions out of a Z2 x Z2 topological phase
    Physical Review B 88, 214411 (2013)
    DOI: [10.1103/PhysRevB.88.214411]
    [abstract] [pdf] cond-mat [arXiv:1308.1407]
  35. K. P. Schmidt,
    Persisting topological order via geometric frustration
    Physical Review B 88, 035118 (2013)
    DOI: [10.1103/PhysRevB.88.035118]
    [abstract] [abstract] [pdf] cond-mat [arXiv:1305.1521]
  36. M. D. Schulz, S. Dusuel, K. P. Schmidt, and J. Vidal
    Topological Phase Transitions in the Golden String-Net Model
    Physical Review Letters 110, 147203 (2013)
    DOI: [doi:10.1103/PhysRevLett.110.147203]
    [abstract] [abstract] [pdf] cond-mat [arXiv:1212.4109 ]
  37. S.S. Jahromi, M. Kargarian, S Farhad Masoudi, and K.P. Schmidt,
    Robustness of a topological phase: Topological color code in parallel magnetic field
    Physical Review B 87, 094413 (2013)
    DOI: [10.1103/PhysRevB.87.094413]
    [abstract] [pdf] cond-mat [arXiv:1211.1687]
  38. M. Powalski, K. Coester, R. Moessner, and K. P. Schmidt,
    Disorder by disorder and flat bands in the kagome transverse field Ising model
    Physical Review B 87, 054404 (2013)
    DOI: [10.1103/PhysRevB.87.054404]
    [abstract] [abstract] [pdf] cond-mat [arXiv:1212.0736 ]
  39. R. Orus, H. Kalis, M. Bornemann, and K. P. Schmidt,
    Bounds on universal quantum computation with perturbed 2d cluster states
    Physical Review A 87, 062312 (2013)
    DOI: [10.1103/PhysRevA.87.062312]
    [abstract] [abstract] [pdf] quant-ph [arXiv:1211.4054]
  40. 2012

  41. M. Nemec, G.R. Foltin, and K.P. Schmidt,
    Microscopic mechanism for the 1/8 magnetization plateau in SrCu_2(BO_3)_2
    Physical Review B 86, 174425 (2012)
    DOI: [doi:10.1103/PhysRevB.86.174425]
    [abstract] [pdf] cond-mat [arXiv:1208.5379]
  42. H.-Y. Yang, A.F. Albuquerque, S. Capponi, A. Laeuchli, and K.P. Schmidt,
    Effective Spin Couplings in the Mott Insulator of the Honeycomb Lattice Hubbard Model
    New Journal of Physics 14, 115027 (2012)
    DOI: [doi:10.1088/1367-2630/14/11/115027]
    [abstract] [pdf] cond-mat [arXiv:1207.1072]
  43. H. Kalis, D. Klagges, R. Orus, and K. P. Schmidt,
    Fate of the cluster state on the square lattice in a magnetic field
    Physical Review A 86, 022317 (2012)
    DOI: [doi:10.1103/PhysRevA.86.022317]
    [abstract] [abstract] [pdf] quant-ph [arXiv:1205.5185]
  44. D. Klagges and K. P. Schmidt,
    Constraints on measurement-based quantum computation in effective cluster states
    Physical Review Letters 108, 230508 (2012)
    DOI: [doi:10.1103/PhysRevLett.108.230508]
    [abstract] [pdf] quant-ph [arXiv:1111.5945]
  45. M. D. Schulz, S. Dusuel, R. Orus, J. Vidal, and K. P. Schmidt,
    Breakdown of a perturbed Z_N topological phase
    New Journal of Physics 14, 025005 (2012)
    DOI: [doi:10.1088/1367-2630/14/2/025005]
    [abstract] [postscript] [pdf] cond-mat [arXiv:1110.3632]
  46. 2011

  47. M. Kamfor, S. Dusuel, K. P. Schmidt, and J. Vidal,
    Fate of Dirac Points in a Vortex Superlattice
    Physical Review B 84, 153404 (2011)
    DOI: [doi:10.1103/PhysRevB.84.153404]
    [abstract] [postscript] [pdf] cond-mat [arXiv:1107.0143]
  48. Salvatore R. Manmana, Jean-David Picon, Kai P. Schmidt, Frederic Mila,
    Unconventional magnetization plateaus in a Shastry-Sutherland spin tube
    European Physics Letters 94, 67004 (2011)
    DOI: [10.1209/0295-5075/94/67004]
    [abstract] [postscript] [pdf] cond-mat [arXiv:1003.1696]
  49. H.Y. Yang and K.P. Schmidt,
    Effective models for gapped phases of strongly correlated quantum lattice models
    European Physics Letters 94, 17004 (2011)
    DOI: [10.1209/0295-5075/94/17004]
    [abstract] [postscript] [pdf] cond-mat [arXiv:1009.0210]
  50. S. Dusuel, M. Kamfor, R. Orus, K. P. Schmidt, and J. Vidal,
    Robustness of a perturbed topological phase
    Physical Review Letters 106 107203 (2011)
    DOI: [doi:10.1103/PhysRevLett.106.107203]
    [abstract] [postscript] [pdf] cond-mat [arXiv:1012.1740]
  51. F. Mila and K.P. Schmidt,
    Strong-coupling expansion and effective hamiltonians
    `Introduction to Frustrated Magnetism'
    Chapter 20, Springer Series in Solid-State Sciences, Vol. 164, eds. C. Lacroix, F. Mila, and P. Mendels (Springer, 2011)
    [abstract] [postscript] [pdf] cond-mat [arXiv:1005.2495]
  52. 2010

  53. I. Exius, K. P. Schmidt, B. Lake, D. A. Tennant, and G. S. Uhrig,
    Vertex corrections in the dynamic structure factor in spin ladders
    Physical Review B 82, 214410 (2010)
    DOI: [doi:10.1103/PhysRevB.82.214410]
    [abstract] [postscript] [pdf] cond-mat [arXiv:1010.2459]
  54. Tao Hong, Y. H. Kim, C. Hotta, Y. Takano, G. Tremelling, M. M. Turnbull, C. P. Landee, H.-J. Kang, N. B. Christensen, K. Lefmann, K. P. Schmidt, G. S. Uhrig, C. Broholm,
    Field-induced Tomonaga-Luttinger liquid phase of a two-leg spin-1/2 ladder with strong leg interactions
    Physical Review Letters 105, 137207 (2010)
    DOI: [doi:10.1103/PhysRevLett.105.137207]
    [abstract] [postscript] [pdf] cond-mat [arXiv:1008.3922]
  55. H.Y. Yang, A. Laeuchli, F. Mila, and K.P. Schmidt,
    Effective spin model of the spin-liquid phase of the Hubbard model on the triangular lattice
    Physical Review Letters 105, 267204 (2010)
    DOI: [doi:10.1103/PhysRevLett.105.267204]
    [abstract] [postscript] [pdf] cond-mat [arXiv:1006.5649]
  56. M. Kamfor, S. Dusuel, J. Vidal, and K.P. Schmidt,
    Kitaev model and dimer coverings on the honeycomb lattice
    J. Stat. Mech. (2010) P08010
    DOI: [10.1088/1742-5468/2010/08/P08010]
    [abstract] [postscript] [pdf] cond-mat [arXiv:1005.5103]
  57. K. P. Schmidt and M. Laad,
    Family of Exactly Solvable Models with an Ultimate Quantum Paramagnetic Ground State
    Physical Review Letters104, 237201 (2010)
    DOI: [doi:10.1103/PhysRevLett.104.237201]
    [abstract] [postscript] [pdf] cond-mat [arXiv:0912.1959]
  58. S. Dusuel, M. Kamfor, K.P. Schmidt, R. Thomale, and J. Vidal,
    Bound states in two-dimensional spin systems around the Ising limit: a quantum finite-lattice study
    Physical Review B 81, 064412 (2010)
    DOI: [doi:10.1103/PhysRevB.81.064412]
    [abstract] [postscript] [pdf] cond-mat [arXiv:0912.1463]
  59. 2009

  60. J. Vidal, R. Thomale, K.P. Schmidt, and S. Dusuel,
    Self-Duality and Bound States of the Toric Code Model in a Transverse Field
    Physical Review B 80, 081104 (2009) (Rapid Communication)
    DOI: [doi:10.1103/PhysRevB.80.081104]
    [abstract] [postscript] [pdf] cond-mat [arXiv:0902.3547]
  61. A.T. Savici, G.E. Granroth, C.L. Broholm, D.M. Pajerowski, C.M. Brown, D.R. Talham, M.W. Meisel, K.P. Schmidt, G.S. Uhrig, S.E. Nagler,
    Neutron scattering evidence for isolated spin-1/2 ladders in (C_5 D_12 N)_2 CuBr_4
    Physical Review B 80, 094411 (2009)
    DOI: [doi:10.1103/PhysRevB.80.094411]
    [abstract] [postscript] [pdf] cond-mat [arXiv:0902.0599]
  62. K.P. Schmidt, J. Dorier, and F. Mila,
    Magnetization plateaux in an extended Shastry-Sutherland model
    Journal of Physics: Conference Series 145, 012047 (2009); Proceedings HFM 2008
    DOI: [10.1088/1742-6596/145/1/012047]
    [abstract] [postscript] [pdf] cond-mat [arXiv:0810.1596]
  63. J. Vidal, S. Dusuel, and K.P. Schmidt,
    Low-energy effective theory of the toric code model in a parallel magnetic field
    Physical Review B 79, 033109 (2009)
    DOI: [doi:10.1103/PhysRevB.79.033109]
    [abstract] [postscript] [pdf] cond-mat [arXiv:0807.0487]

2008

  1. F. Mila, J. Dorier, and K.P. Schmidt,
    Supersolid phases of hardcore bosons on the square lattice: Correlated hopping, next-nearest neighbor hopping and frustration
    Proceedings of YKIS2007 conference as a special issue of Prog. Theor. Phys. Suppl. HFM 2007 176, 355 (2008)
    DOI: [10.1143/PTPS.176.355]
    [abstract] [postscript] [pdf] cond-mat [arXiv:0810.5448]
  2. J. Vidal, K.P. Schmidt, and S. Dusuel,
    Perturbative approach to an exactly solved problem: the Kitaev honeycomb model
    Physical Review B 78, 245121 (2008). Editor's Suggestion
    DOI: [doi:10.1103/PhysRevB.78.245121]
    [abstract] [postscript] [pdf] cond-mat [arXiv:0809.1553]
  3. J.-D. Picon, F. Albuquerce, K.P. Schmidt, N. Laflorencie, M. Troyer, and F. Mila
    Mechanisms for Spin-Supersolidity in S=1/2 Spin-Dimer Antiferromagnets
    Physical Review B 78, 184418 (2008). Editor's Suggestion
    DOI: [doi:10.1103/PhysRevB.78.184418]
    [abstract] [postscript] [pdf] cond-mat [arXiv:0807.4190]
  4. J. Dorier, K.P. Schmidt and F. Mila,
    Theory of magnetization plateaux in the Shastry-Sutherland model
    Physical Review Letters 101, 250402 (2008)
    DOI: [doi:10.1103/PhysRevLett.101.250402]
    [abstract] [postscript] [pdf] cond-mat [arXiv:0806.3406]
  5. K.P. Schmidt, J. Dorier, and A. Läuchli,
    Solids and supersolids of three-body interacting polar molecules in an optical lattice
    Physical Review Letters 101, 150405 (2008)
    DOI: [doi:10.1103/PhysRevLett.101.150405]
    [abstract] [postscript] [pdf] cond-mat [arXiv:0805.1408]
  6. S. Dusuel, K.P. Schmidt, J. Vidal, and R.L. Zaffino,
    Perturbative study of the Kitaev model with spontaneous time-reversal symmetry breaking
    Physical Review B 78, 125102 (2008)
    DOI: [doi:10.1103/PhysRevB.78.125102]
    [abstract] [postscript] [pdf] cond-mat [arXiv:0804.4775]
  7. S. Dusuel, K.P. Schmidt, and J. Vidal,
    Creation and manipulation of anyons in the Kitaev model
    Physical Review Letters 100, 177204 (2008)
    DOI: [doi:10.1103/PhysRevLett.100.177204]
    [abstract] [postscript] [pdf] cond-mat [arXiv:0802.0379]
  8. J. Vidal, S. Dusuel, and K.P. Schmidt
    Comment on "Anyonic braiding in optical lattices"
    (2008)
    DOI: [doi:]
    [abstract] [postscript] [pdf] cond-mat [arXiv:0801.4620]
  9. K.P. Schmidt, S. Dusuel and J. Vidal,
    Emergent fermions and anyons in the Kitaev model
    Physical Review Letters 100, 057208 (2008)
    DOI: [doi:10.1103/PhysRevLett.100.057208]
    [abstract] [postscript] [pdf] cond-mat [arXiv:0709.3017]
  10. K.P. Schmidt, J. Dorier, A. Läuchli and F. Mila,
    Supersolid phase induced by correlated hopping in spin-1/2 frustrated quantum magnets
    Physical Review Letters 100, 090401 (2008)
    DOI: [doi:10.1103/PhysRevLett.100.090401]
    [abstract] [postscript] [pdf] cond-mat [arXiv:0706.1517]

2007

  1. K.P. Schmidt and G.S. Uhrig
    Two-Dimensionality of Magnetic Excitations on the Trellis Lattice: (La,Sr,Ca)14Cu24O41 and SrCu2O3
    Physical Review B 75(22), 224414 (2007)
    DOI: [doi:10.1103/PhysRevB.74.224414]
    [abstract] [postscript] [pdf] cond-mat [cond-mat/0701551]
  2. K.P. Schmidt, M. Grüninger, and G.S. Uhrig
    The fate of orbitons coupled to phonons
    Physical Review B 76(7), 075108 (2007)
    DOI: [doi:10.1103/PhysRevB.76.075108]
    [abstract] [postscript] [pdf] cond-mat [cond-mat/0603766]
  3. S. Notbohm, P. Ribeiro, B. Lake, D.A. Tennant, K.P. Schmidt, G.S. Uhrig, C. Hess, R. Klingeler, G. Behr, B. Büchner, M. Reehuis, R.I. Bewle, C.D. Frost, P.Manuel, and R.S. Eccleston
    One- and Two-Triplon Spectra of a Cuprate Ladder
    Physical Review Letters 98(2), 027403 (2007)
    DOI: [doi:10.1103/PhysRevLett.98.027403]
    [abstract] [postscript] [pdf] cond-mat [cond-mat/0608109]

2006

  1. K.P. Schmidt, J. Dorier, A. Läuchli and F. Mila,
    Single-particle versus pair condensation of hard-core bosons with correlated hopping
    Physical Review B 74(9), 174508 (2006)
    DOI: [doi:10.1103/PhysRevB.74.174508]
    [abstract] [postscript] [pdf] cond-mat [cond-mat/0607618]
  2. Tao Hong, M. Kenzelmann, M.M. Turnbull, C.P. Landee, B.D. Lewis, K.P. Schmidt, G.S. Uhrig, Y.Qiu, C.Broholm, and D.H. Reich
    Neutron scattering from a coordination polymer quantum paramagnet
    Physical Review B 74(9), 094434 (2006)
    DOI: [doi:10.1103/PhysRevB.74.094434]
    [abstract] [postscript] [pdf] cond-mat [cond-mat/0603592]
  3. K.P. Schmidt and G.S. Uhrig
    Hard-core magnons in the S=½ Heisenberg model on the square lattice
    Physical Review B 73(17), 172407 (2006)
    DOI: [doi:10.1103/PhysRevB.73.172407]
    [abstract] [postscript] [pdf] cond-mat [cond-mat/0512244]
  4. K.P. Schmidt, A. Reischl, and G.S. Uhrig
    Thermodynamics of adiabatically loaded cold bosons in the Mott insulating phase of one-dimensional optical lattices
    European Physical Journal D 38(2), 343-352 (2006)
    DOI: [doi:10.1140/epjd/e2006-00003-9]
    [abstract] [postscript] [pdf] cond-mat [cond-mat/0510461]

2005

  1. A. Reischl, K.P. Schmidt, and G.S. Uhrig
    Temperature in one-dimensional bosonic Mott insulators
    Physical Review A 72(6), 063609 (2005)
    DOI: [doi:10.1103/PhysRevA.72.063609]
    [abstract] [postscript] [pdf] cond-mat [cond-mat/0504724]
  2. K.P. Schmidt, A. Gössling, U. Kuhlmann, C. Thomsen, A. Löffert, C. Gross, and W. Assmus,
    Raman response of Magnetic Excitations in Cuprate Ladders and Planes
    Physical Review B 72, 094419 (2005)
    DOI: [doi:10.1103/PhysRevB.74.094419]
    [abstract] [postscript] [pdf] cond-mat [cond-mat/0503558]
  3. K.P. Schmidt and G.S. Uhrig
    Spectral Properties of Magnetic Excitations in Cuprate Two-Leg Ladder Systems
    Modern Physics Letters B 19(24), 1179-1205 (2005)
    DOI: [doi:10.1142/S0217984905009237]
    [abstract] [postscript] [pdf] cond-mat [cond-mat/0508349]
  4. G.S. Uhrig, K.P. Schmidt, and M. Grüninger
    Magnetic Excitations in Bilayer High-Temperature Superconductors with Stripe Correlations
    Journal of the Physical Society of Japan 74 (Suppl.), 86-97 (2005)
    [abstract] [postscript] [pdf] cond-mat [cond-mat/0502460]
  5. G.S. Uhrig, K.P. Schmidt, and M. Grüninger
    Magnetic excitations in the stripe phase of high-Tc superconductors
    Journal of Magnetism and Magnetic Materials 290-291, 330-333 (2005)
    DOI: [doi:10.1016/j.jmmm.2004.11.230]
    [abstract] [postscript] [pdf] cond-mat [cond-mat/0407648]

2004

  1. G.S. Uhrig, K.P. Schmidt, and M. Grüninger
    Unifying Magnons and Triplons in Stripe-Ordered Cuprate Superconductors
    Physical Review Letter 93(26), 267003 (2004)
    DOI: [doi:10.1103/PhysRevLett.93.267003]
    [abstract] [postscript] [pdf] cond-mat [cond-mat/0402659]
  2. C. Knetter, K.P. Schmidt, and G.S. Uhrig
    High order perturbation theory for spectral densities of multi-particle excitations: S=½ two-leg Heisenberg ladder
    European Physical Journal B 36(4), 525-544 (2004)
    DOI: [doi:10.1140/epjb/e2004-00008-2]
    [abstract] [postscript] [pdf] cond-mat [cond-mat/0312246]
  3. K.P. Schmidt, C. Knetter, and G.S. Uhrig
    Spectral properties of the dimerized and frustrated S=½ chain
    Physical Review B 69(10), 104417 (2004)
    DOI: [doi:10.1103/PhysRevB.69.104417]
    [abstract] [postscript] [pdf] cond-mat [cond-mat/0307678]

2003

  1. M. Grüninger, M. Windt, E. Benckiser, T.S. Nunner, K.P. Schmidt, G.S. Uhrig, and T. Kopp
    Optical Spectroscopy of Low-Dimensional Quantum Spin Systems
    in Advances in Solid State Physics, Vol. 43, 95-112, edited by B. Kramer (Springer, Heidelberg, 2003)
    DOI: [doi:10.1007/b12017]
  2. C. Knetter, K.P. Schmidt, and G.S. Uhrig
    The structure of operators in effective particle-conserving models
    Journal of Physics A: Mathematics and General 36(29), 7889-7907 (2003)
    DOI: [doi:10.1088/0305-4470/36/29/302]
    [abstract] [postscript] [pdf] cond-mat [cond-mat/0306333]
  3. K.P. Schmidt and G.S. Uhrig
    Excitations in One-Dimensional S=½ Quantum Antiferromagnets
    Physical Review Letters 90(22), 227204 (2003)
    DOI: [doi:10.1103/PhysRevLett.90.227204]
    [abstract] [postscript] [pdf] cond-mat [cond-mat/0211627]
  4. K.P. Schmidt, H. Monien, and G.S. Uhrig
    Rung-singlet phase of the S=½ two-leg spin-ladder with four-spin cyclic exchange
    Physical Review B 67(18), 184413 (2003)
    DOI: [doi:10.1103/PhysRevB.67.184413]
    [abstract] [postscript] [pdf] cond-mat [cond-mat/0211429]
  5. A. Bühler, U. Löw, K.P. Schmidt, and G.S. Uhrig
    Thermodynamic properties of spin ladders with cyclic exchange
    Physical Review B 67(13), 134428 (2003)
    DOI: [doi:10.1103/PhysRevB.67.134428]
    [abstract] [postscript] [pdf] cond-mat [cond-mat/0210669]
  6. K.P. Schmidt, C. Knetter, M. Grüninger, and G.S. Uhrig
    Charge-Order-Induced Sharp Raman Peak in Sr14Cu24O41
    Physical Review Letters 90(16), 167201 (2003)
    DOI: [doi:10.1103/PhysRevLett.90.167201]
    [abstract] [postscript] [pdf] cond-mat [cond-mat/0210092]
  7. K.P. Schmidt, C. Knetter, and G.S. Uhrig
    Novel Extrapolation for Strong Coupling Expansions
    Acta Physica Polonica B 34(22), 1481 (2003)
    [abstract] [postscript] [pdf] cond-mat [cond-mat/0208358]

2002

  1. M. Grüninger, M. Windt, T. Nunner, C. Knetter, K. Schmidt, G.S. Uhrig, T. Kopp, A. Freimuth, U. Ammerahl, B. Büchner, and A. Revcolevschi
    Magnetic excitations in two-leg spin ½ ladders: experiment and theory
    Journal of Physics and Chemistry of Solids 63(12), 2335-2173 (2002)
    DOI: [doi:10.1016/S0022-3697(02)00251-2]
    [abstract] [postscript] [pdf] cond-mat [cond-mat/0109524]
  2. M. Grüninger, M. Windt, T. Nunner, C. Knetter, K.P. Schmidt, G.S. Uhrig, T. Kopp, A. Freimuth, U. Ammerahl, B. Büchner, and A. Revcolevschi
    Optical spectroscopy of (La,Ca)14Cu24O41 spin ladders: comparison of experiment and theory
    Physica B: Condensed Matter 312-313, 617-618 (2002)
    DOI: [doi:10.1016/S0921-4526(01)01199-1]
    [abstract] [postscript] [pdf] cond-mat [cond-mat/0108437]
  3. C. Knetter, K.P. Schmidt, and G.S. Uhrig
    Multi-particle excitations and spectral densities in quantum spin-systems
    Physica B: Condensed Matter 312-313, 527-528 (2002)
    DOI: [doi:10.1016/S0921-4526(01)01333-3]
    [abstract] [postscript] [pdf] cond-mat [cond-mat/0107526]

2001

  1. K.P. Schmidt, C. Knetter, and G.S. Uhrig
    Raman Response in Antiferromagnetic Two-Leg S=½ Heisenberg Ladders
    Europhysics Letters 56(6), 877-883 (2001)
    DOI: [doi:doi:10.1209/epl/i2001-00601-y]
    [abstract] [postscript] [pdf] cond-mat [cond-mat/0107431]
  2. C. Knetter, K.P. Schmidt, M. Grüninger, and G.S. Uhrig
    Fractional and Integer Excitations in Quantum Antiferromagnetic Spin ½ Ladders
    Physical Review Letters 87(16), 167204 (2001)
    DOI: [doi:10.1103/PhysRevLett.87.167204]
    [abstract] [postscript] [pdf] cond-mat [cond-mat/0106077]
  3. M. Windt, M. Grüninger, T. Nunner, C. Knetter, K.P. Schmidt, G.S. Uhrig, T. Kopp, A. Freimuth, U. Ammerahl, B. Büchner, and A. Revcolevschi
    Observation of Two-Magnon Bound States in the Two-Leg Ladders of (Ca,La)14Cu24O41
    Physical Review Letters 87(12), 127002 (2001)
    DOI: [doi:10.1103/PhysRevLett.87.127002]
    [abstract] [postscript] [pdf] cond-mat [cond-mat/0103438]

Interdisziplinäre Publikationen / interdisciplinary publications