Picture of Kai Schmidt

2020

2019

2018

Publications

Please have also a look at my Researcher ID

List of papers

2020

M. Hörmann, K.P. Schmidt
Dynamic structure factor of Heisenberg bilayer dimer phases in the presence of quenched disorder and frustration
$ cond-mat [arXiv:2004.00565 ]
J. Rohn, M. Hörmann, Claudiu Genes, K.P. Schmidt
The Ising model in a light-induced quantized transverse field
cond-mat [arXiv:2003.05804]
C. Boos and K. P. Schmidt
Exact plaquette singlet phases in an orthogonal-plaquette model
cond-mat [arXiv:1912.09060]
C. Boos, C. J. Ganahl, M. Lajkó, P. Nataf, K. Penc, A. M. Läuchli, K. P. Schmidt, F. Mila
Time-reversal symmetry breaking Abelian chiral spin liquid in Mott phases of three-component fermions on the triangular lattice
cond-mat [arXiv:1802.03179]
M. Mühlhauser, M.R. Walther, D.A. Reiss, K.P. Schmidt
Quantum robustness of fracton phases
Physical Review B 101, 054426 (2020)
DOI: [10.1103/PhysRevB.101.054426]
cond-mat [arXiv:1911.13117]
P. Schmoll, S. S. Jahromi, M. Hörmann, K.P. Schmidt, R. Orus
Fine-Grained Tensor Network Methods
cond-mat [arXiv:1911.04882]
2019
J. Koziol, S. Fey, S.C. Kapfer, K.P. Schmidt
Quantum criticality of the transverse-field Ising model with long-range interactions on triangular-lattice cylinders
Physical Review B 100, 144411 (2019)
DOI: [10.1103/PhysRevB.100.144411]
cond-mat [arXiv:1907.10693]
C. Boos, S.P.G. Crone, I.A. Niesen, P. Corboz, K.P. Schmidt, F. Mila
Theory of the intermediate phase of SrCu_2(BO_3)_2 under pressure
Physical Review B 100, 140413(R) (2019)
DOI: [10.1103/PhysRevB.100.140413]
cond-mat [arXiv:1903.07887]
D. Reiss and K.P. Schmidt
Quantum robustness and phase transitions of the 3D Toric Code in a field
SciPost Physics 6, 078 (2019)
DOI: [doi: 10.21468/SciPostPhys.6.6.078]
cond-mat [arXiv:1902.03908]
Tao Ying, Kai Phillip Schmidt, Stefan Wessel
The Higgs Mode of Planar Coupled Spin-Ladders and its Observation in C9H18N2CuBr4
Physical Review Letters 122, 127201 (2019)
(Editors suggestion)
DOI: [10.1103/PhysRevLett.122.127201]
cond-mat [arXiv:1812.05853]
Article is highlighted on PHYS.ORG
S. Fey, S.C. Kapfer, K.P. Schmidt
Quantum criticality of two-dimensional quantum magnets with long-range interactions
Physical Review Letters 122, 017203 (2019)
DOI: [10.1103/PhysRevLett.122.017203]
cond-mat [arXiv:1802.06684]
2018
Urban F. P. Seifert, Julian Gritsch, Erik Wagner, Darshan G. Joshi, Wolfram Brenig, Matthias Vojta, Kai P. Schmidt
Bilayer Kitaev models: Phase diagrams and novel phases
Physical Review B 98, 155101 (2018)
DOI: [10.1103/PhysRevB.98.155101]
cond-mat [arXiv:1806.01852]
M. Hörmann, P. Wunderlich, K.P. Schmidt
Dynamic structure factor of disordered quantum spin ladders
Physical Review Letters 121, 167201 (2018)
DOI: [10.1103/PhysRevLett.121.167201]
cond-mat [arXiv:1806.01717]
M. Powalski, K.P. Schmidt, and G.S. Uhrig
Mutually attracting spin waves in the square-lattice quantum antiferromagnet
SciPost Physics 4, 001 (2018)
DOI: [doi: 10.21468/SciPostPhys.4.1.001]
cond-mat [arXiv:1701.04730]
2017
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
Physical Review B 96, 235123 (2017)
DOI: [10.1103/PhysRevB.96.235123]
cond-mat [arXiv:1710.03105]
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
cond-mat [arXiv:1705.06172]
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]
cond-mat [arXiv:1703.03566]
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
cond-mat [arXiv:1608.08172]
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]
cond-mat [arXiv:1609.00198]
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]
cond-mat [arXiv:1607.04645]
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]
cond-mat [arXiv:1602.05983 ]

2016

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]
cond-mat [arXiv:1609.00484]
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]
cond-mat [arXiv:1608.05618]
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]
cond-mat [arXiv:1606.05111]
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]
cond-mat [arXiv:1605.05848]
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]
cond-mat [arXiv:1604.01988]
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]
cond-mat [arXiv:1601.00793 ]

2015

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]
cond-mat [arXiv:1508.05200 ]
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]
cond-mat [arXiv:1505.02975 ]
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]
cond-mat [arXiv:1504.07371 ]
Kai Phillip Schmidt und Simon Trebst
Topologische Spinflüssigkeiten
Physik Journal 04/2015
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]
cond-mat [arXiv:1409.5007 ]
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]
cond-mat [arXiv:1407.7870 ]

2014

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]
cond-mat [arXiv:1408.0022 ]
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]
cond-mat [arXiv:1407.8229 ]
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]
cond-mat [arXiv:1405.3260 ]
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]
cond-mat [arXiv:1405.6748 ]
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]
cond-mat [arXiv:1403.1406 ]
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]
cond-mat [arXiv:1401.1033 ]
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]
cond-mat [arXiv:1308.6150]

2013

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]
cond-mat [arXiv:1308.4151]
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]
cond-mat [arXiv:1308.1803]
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]
cond-mat [arXiv:1308.1407]
K. P. Schmidt,
Persisting topological order via geometric frustration
Physical Review B 88, 035118 (2013)
DOI: [10.1103/PhysRevB.88.035118]
cond-mat [arXiv:1305.1521]
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]
cond-mat [arXiv:1212.4109 ]
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]
cond-mat [arXiv:1211.1687]
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]
cond-mat [arXiv:1212.0736 ]
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]
quant-ph [arXiv:1211.4054]

2012

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]
cond-mat [arXiv:1208.5379]
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]
cond-mat [arXiv:1207.1072]
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]
quant-ph [arXiv:1205.5185]
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]
quant-ph [arXiv:1111.5945]
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]
cond-mat [arXiv:1110.3632]

2011

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]
cond-mat [arXiv:1107.0143]
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]
cond-mat [arXiv:1003.1696]
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]
cond-mat [arXiv:1009.0210]
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]
cond-mat [arXiv:1012.1740]
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)
cond-mat [arXiv:1005.2495]

2010

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]
cond-mat [arXiv:1010.2459]
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]
cond-mat [arXiv:1008.3922]
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]
cond-mat [arXiv:1006.5649]
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]
cond-mat [arXiv:1005.5103]
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]
cond-mat [arXiv:0912.1959]
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]
cond-mat [arXiv:0912.1463]

2009

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]
cond-mat [arXiv:0902.3547]
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]
cond-mat [arXiv:0902.0599]
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]
cond-mat [arXiv:0810.1596]
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]
cond-mat [arXiv:0807.0487]

2008

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]
cond-mat [arXiv:0810.5448]
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]
cond-mat [arXiv:0809.1553]
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]
cond-mat [arXiv:0807.4190]
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]
cond-mat [arXiv:0806.3406]
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]
cond-mat [arXiv:0805.1408]
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]
cond-mat [arXiv:0804.4775]
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]
cond-mat [arXiv:0802.0379]
J. Vidal, S. Dusuel, and K.P. Schmidt
Comment on "Anyonic braiding in optical lattices"
(2008)
DOI: [doi:]
cond-mat [arXiv:0801.4620]
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]
cond-mat [arXiv:0709.3017]
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]
cond-mat [arXiv:0706.1517]

2007

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]
cond-mat [cond-mat/0701551]
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]
cond-mat [cond-mat/0603766]
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]
cond-mat [cond-mat/0608109]

2006

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]
cond-mat [cond-mat/0607618]
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]
cond-mat [cond-mat/0603592]
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]
cond-mat [cond-mat/0512244]
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]
cond-mat [cond-mat/0510461]

2005

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]
cond-mat [cond-mat/0504724]
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]
cond-mat [cond-mat/0503558]
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]
cond-mat [cond-mat/0508349]
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)
cond-mat [cond-mat/0502460]
G.S. Uhrig, K.P. Schmidt, and M. Grüninger
Magnetic excitations in the stripe phase of high-T_c superconductors
Journal of Magnetism and Magnetic Materials 290-291, 330-333 (2005)
DOI: [doi:10.1016/j.jmmm.2004.11.230]
cond-mat [cond-mat/0407648]

2004

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]
cond-mat [cond-mat/0402659]
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]
cond-mat [cond-mat/0312246]
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]
cond-mat [cond-mat/0307678]

2003

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]
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]
cond-mat [cond-mat/0306333]
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]
cond-mat [cond-mat/0211627]
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]
cond-mat [cond-mat/0211429]
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]
cond-mat [cond-mat/0210669]
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]
cond-mat [cond-mat/0210092]
K.P. Schmidt, C. Knetter, and G.S. Uhrig
Novel Extrapolation for Strong Coupling Expansions
Acta Physica Polonica B 34(22), 1481 (2003)
cond-mat [cond-mat/0208358]

2002

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]
cond-mat [cond-mat/0109524]
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]
cond-mat [cond-mat/0108437]
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]
cond-mat [cond-mat/0107526]

2001

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]
cond-mat [cond-mat/0107431]
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]
cond-mat [cond-mat/0106077]
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]
cond-mat [cond-mat/0103438]

Interdisziplinäre Publikationen / interdisciplinary publications

Sicherheit und Krise
Interdisziplinäre Beiträge der Forschungstage 2009 und 2010 des Jungen Kollegs der Nordrhein-Westfälischen Akademie der Wissenschaften und der Künste
ISBN:978-3-506-77552-8
Perspektiven - Forschungsfragen der Zukunft
Nordrhein-Westfälische Akademie der Wissenschaften und der Künste
ISBN:978-3-506-77180-3