352 citations · 925 across the 13 of their papers we have counts for
13 papers
Frustrated kagome-lattice bilayer quantum Heisenberg antiferromagnet
Dmytro Yaremchuk, Taras Hutak, Vasyl Baliha +4
We consider the antiferromagnetic Heisenberg model on a frustrated kagome-lattice bilayer with strong nearest-neighbor interlayer coupling and examine its low-temperature m…
Magnetism of the N=42 kagome lattice antiferromagnet
J. Schnack, J. Schulenburg, J. Richter
For the paradigmatic frustrated spin-half Heisenberg antiferromagnet on the kagome lattice we performed large-scale numerical investigation of thermodynamic functions by means of t…
Flat-Band Ferromagnetism as a Pauli-Correlated Percolation Problem
M. Maksymenko, A. Honecker, R. Moessner +2
We investigate the location and nature of the para-ferro transition of interacting electrons in dispersionless bands using the example of the Hubbard model on the Tasaki lattice. T…
Decorated Shastry-Sutherland lattice in the spin-1/2 magnet CdCu2(BO3)2
O. Janson, I. Rousochatzakis, A. A. Tsirlin +3
We report the microscopic magnetic model for the spin-1/2 Heisenberg system CdCu2(BO3)2, one of the few quantum magnets showing the 1/2-magnetization plateau. Recent neutron diffra…
Magnetic properties of the Hubbard model on kagome stripes
O. Derzhko, M. Maksymenko, J. Richter +2
We consider the one-orbital -site repulsive Hubbard model on two kagome-like chains, both of which yield a completely dispersionless (flat) one-electron band. Using exact many-e…
The spin-1/2 J1-J2 Heisenberg antiferromagnet on the square lattice: Exact diagonalization for N=40 spins
J. Richter, J. Schulenburg
We present numerical exact results for the ground state and the low-lying excitations for the spin-1/2 J1-J2 Heisenberg antiferromagnet on finite square lattices of up to N=40 site…
Entropy of fermionic models on highly frustrated lattices
A. Honecker, J. Richter
Spinless fermions on highly frustrated lattices are characterized by a lowest single-particle band which is completely flat. Concrete realizations are provided by the sawtooth chai…
Frustration effects in magnetic molecules
J. Schnack
Besides being a fascinating class of new materials, magnetic molecules provide the opportunity to study concepts of condensed matter physics in zero dimensions. This contribution w…
Sequence of first-order quantum phase transitions in a frustrated spin half dimer-plaquette chain
J. Schulenburg, J. Richter
We study the frustrated dimer-plaquette quantum spin chain for ferromagnetic dimer bonds. This quantum system undergoes a series of first-order ground-state phase transitions drive…
Macroscopic magnetization jumps due to independent magnons in frustrated quantum spin lattices
J. Schulenburg, A. Honecker, J. Schnack +2
For a class of frustrated spin lattices including the kagome lattice we construct exact eigenstates consisting of several independent, localized one-magnon states and argue that th…
Infinite series of magnetization plateaus in the frustrated dimer-plaquette chain
J. Schulenburg, J. Richter
The dimer-plaquette chain undergoes a first order transition driven by frustration to an orthogonal dimer ground state. We analyze the magnetization curve in this orthogonal dimer…
The antiferromagnetic spin 1/2 chain with competing dimers and plaquettes: Numerical versus exact results
J. Richter, N. B. Ivanov, J. Schulenburg
We examine the ground state and the excitations of an one-dimensional Heisenberg spin 1/2 antiferromagnet with alternating dimers and four-spin plaquettes (dimer-plaquette chain).…
A solvable model of a random spin-1/2 XY chain
O. Derzhko, J. Richter
The paper presents exact calculations of thermodynamic quantities for the spin-1/2 isotropic XY chain with random lorentzian intersite interaction and transverse field that depends…