40.2k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Max Planck Institute for Gravitational PhysicsDE1.5k papers
- Max Planck Institute for Extraterrestrial PhysicsDE1.4k papers
- Max Planck Institute for AstrophysicsDE1.2k papers
- Max Planck Institute for Nuclear PhysicsDE1.1k papers
- Centre National de la Recherche ScientifiqueFR986 papers
- Max Planck Institute for the Physics of Complex SystemsDE799 papers
- Max Planck Institute for MathematicsDE519 papers
- Heidelberg UniversityDE513 papers
- Max Planck Institute for PhysicsDE507 papers
- Max Planck Institute for Solar System ResearchDE483 papers
- California Institute of TechnologyUS481 papers
- National Institute for AstrophysicsIT450 papers
57 papers · 2 filters
Crystal-fields in YbInNi4 determined with magnetic form factor and inelastic neutron scattering
A. Severing, F. Givord, J. -X. Boucherle +9
The magnetic form factor of YbInNi4 has been determined via the flipping ratios R with polarized neutron diffraction and the scattering function S(Q,w) was measured in an inelastic…
Modified spin-wave theory with ordering vector optimization II: Spatially anisotropic triangular lattice and model with Heisenberg interactions
Philipp Hauke, Tommaso Roscilde, Valentin Murg +2
We study the ground state phases of the Heisenberg quantum antiferromagnet on the spatially anisotropic triangular lattice and on the square lattice with up to next-next-ne…
Strong electron correlations in FeSb2: An optical investigation and comparison with RuSb2
A. Herzog, M. Marutzky, J. Sichelschmidt +4
We report investigations of the optical properties of the narrow gap semiconductor FeSb2 in comparison with the structural homolog RuSb2. In the infrared region the latter shows in…
Phase diagram and continuous pair-unbinding transition of the bilinear-biquadratic S=1 Heisenberg chain in a magnetic field
Salvatore R. Manmana, Andreas M. Läuchli, Fabian H. L. Essler +1
We investigate the properties of the Heisenberg S=1 chain with bilinear and biquadratic interactions in a magnetic field using the Density Matrix Renormalization Group, Bethe ansat…
Ultrafast changes in lattice symmetry probed by coherent phonons
Simon Wall, Daniel Wegkamp, Laura Foglia +4
The electronic and structural properties of a material are strongly determined by its symmetry. Changing the symmetry via a photoinduced phase transition offers new ways to manipul…
Multi-step approach to microscopic models for frustrated quantum magnets - the case of the natural mineral azurite
Harald Jeschke, Ingo Opahle, Hem Kandpal +14
The natural mineral azurite Cu(CO)(OH) is a frustrated magnet displaying unusual and controversially discussed magnetic behavior. Motivated by the lack of a unified…
Variational study of a mobile hole in a two dimensional quantum antiferromagnet using entangled-plaquette states
Fabio Mezzacapo
We study the properties of a mobile hole in the model on the square lattice by means of variational Monte Carlo simulations based on the entangled-plaquette ansatz. Our energ…
Break up of heavy fermions at an antiferromagnetic instability
S. Friedemann, S. Wirth, S. Kirchner +7
We present results of high-resolution, low-temperature measurements of the Hall coefficient, thermopower, and specific heat on stoichiometric YbRh2Si2. They support earlier conclus…
Orbital occupation and magnetic moments of tetrahedrally coordinated iron in CaBaFe4O7
N. Hollmann, Z. Hu, Hua Wu +8
CaBaFe4O7 is a mixed-valent transition metal oxide having both Fe2+ and Fe3+ ions in tetrahedral coordination. Here we characterize its magnetic properties by magnetization measure…
Local electronic structure of Fe impurities in MgO thin films: Temperature-dependent soft x-ray absorption spectroscopy study
T. Haupricht, R. Sutarto, M. W. Haverkort +7
We report on the local electronic structure of Fe impurities in MgO thin films. Using soft x-ray absorption spectroscopy (XAS) we verified that the Fe impurities are all in the 2+…
Peculiar long-range superexchange in Cu2A2O7 (A = P, As, V) as a key element of the microscopic magnetic model
O. Janson, A. A. Tsirlin, J. Sichelschmidt +3
A microscopic magnetic model for alpha-Cu2P2O7 is evaluated in a combined theoretical and experimental study. Despite a dominant intradimer coupling J1, sizable interdimer coupling…
Interplay of Spin and Lattice Degrees of Freedom in the Frustrated Antiferromagnet CdCr_2O_4: High-field and Temperature Induced Anomalies of the Elastic Constants
Subhro Bhattacharjee, S. Zherlitsyn, O. Chiatti +7
Temperature and magnetic field studies of the elastic constants of the chromium spinel CdCr_2O_4 show pronounced anomalies related to strong spin-phonon coupling in this frustrated…
Ab initio modeling of Bose-Einstein condensation in Pb2V3O9
Alexander A. Tsirlin, Helge Rosner
We apply density functional theory band structure calculations and quantum Monte Carlo simulations to investigate the Bose-Einstein condensation in the spin-1/2 quantum magnet Pb2V…
Magnetism and superconductivity driven by identical 4 states in a heavy-fermion metal
Sunil Nair, O. Stockert, U. Witte +8
The apparently inimical relationship between magnetism and superconductivity has come under increasing scrutiny in a wide range of material classes, where the free energy landscape…
Classifying quantum phases using Matrix Product States and PEPS
Norbert Schuch, David Perez-Garcia, Ignacio Cirac
We give a classification of gapped quantum phases of one-dimensional systems in the framework of Matrix Product States (MPS) and their associated parent Hamiltonians, for systems w…
Symmetry Breaking on the Three-Dimensional Hyperkagome Lattice of Na_4Ir_3O_8
E. J. Bergholtz, A. M. Laeuchli, R. Moessner
We study the antiferromagnetic spin-1/2 Heisenberg model on the highly frustrated, three-dimensional, hyperkagome lattice of Na_4Ir_3O_8 using a series expansion method. We propose…
Electron Spin Resonance of the ferromagnetic Kondo lattice CeRuPO
T. Förster, J. Sichelschmidt, C. Krellner +2
The spin dynamics of the ferromagnetic Kondo lattice CeRuPO is investigated by Electron Spin Resonance (ESR) at microwave frequencies of 1, 9.4, and 34~GHz. The measured resonance…
Fermi-surface collapse and dynamical scaling near a quantum critical point
Sven Friedemann, Niels Oeschler, Steffen Wirth +6
Quantum criticality arises when a macroscopic phase of matter undergoes a continuous transformation at zero temperature. While the collective fluctuations at quantum-critical point…
Spiral ground state in the quasi-two-dimensional spin-1/2 system Cu2GeO4
Alexander A. Tsirlin, Ronald Zinke, Johannes Richter +1
We apply density functional theory band structure calculations, the coupled-cluster method, and exact diagonalization to investigate the microscopic magnetic model of the spin-1/2…
Three-sublattice ordering of the SU(3) Heisenberg model of three-flavor fermions on the square and cubic lattices
Tamas A. Toth, Andreas M. Laeuchli, Frederic Mila +1
Combining a semi-classical analysis with exact diagonalizations, we show that the ground state of the SU(3) Heisenberg model on the square lattice develops three-sublattice long-ra…
Statics and dynamics of weakly coupled antiferromagnetic spin-1/2 ladders in a magnetic field
Pierre Bouillot, Corinna Kollath, Andreas M. Läuchli +9
We investigate weakly coupled spin-1/2 ladders in a magnetic field. The work is motivated by recent experiments on the compound (C5H12N)2CuBr4 (BPCB). We use a combination of numer…
Microscopic model of (CuCl)LaNb2O7: coupled spin dimers replace a frustrated square lattice
Alexander A. Tsirlin, Helge Rosner
We present a microscopic model of the spin-gap quantum magnet (CuCl)LaNb2O7 that was previously suggested as a realization of the spin-1/2 frustrated square lattice. Taking advanta…
Hidden dimer order in the quantum compass model
Wojciech Brzezicki, Andrzej M. Oleś
We introduce an exact spin transformation that maps frustrated Z_{i,j}Z_{i,j+1} and X_{i,j}X_{i+1,j} spin interactions along the rows and columns of the quantum compass model (QCM)…
Spin polarization of the magnetic spiral in NaCu_2O_2, as seen by NMR
A. A. Gippius, A. S. Moskvin, S. -L. Drechsler
The incommensurate (IC) spin ordering in quasi-1D edge-shared cuprate NaCu_2O_2 has been studied by ^{23}Na nuclear magnetic resonance spectroscopy in an external magnetic field ne…