352 citations · 6.3k across the 121 of their papers we have counts for
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Exact calculation of the magnetocaloric effect in the spin-1/2 XXZ chain
Christian Trippe, Andreas Honecker, Andreas Klümper +1
We calculate the entropy and cooling rate of the antiferromagnetic spin-1/2 XXZ chain under an adiabatic demagnetization process using the quantum transfer-matrix technique and non…
Low-temperature properties of the Hubbard model on highly frustrated one-dimensional lattices
O. Derzhko, J. Richter, A. Honecker +2
We consider the repulsive Hubbard model on three highly frustrated one-dimensional lattices -- sawtooth chain and two kagomé chains -- with completely dispersionless (flat) lowest…
Magnetism of Finite Graphene Samples: Mean-Field Theory compared with Exact Diagonalization and Quantum Monte Carlo Simulation
Hélène Feldner, Zi Yang Meng, Andreas Honecker +3
The magnetic properties of graphene on finite geometries are studied using a self-consistent mean-field theory of the Hubbard model. This approach is known to predict ferromagnetic…
Ground-state degeneracy and low-temperature thermodynamics of correlated electrons on highly frustrated lattices
A. Honecker, O. Derzhko, J. Richter
Highly frustrated lattices yield a completely flat lowest single-electron band. Remarkably, exact many-body ground states can be constructed for the repulsive Hubbard model and the…
Magnetization plateaux in the classical Shastry-Sutherland lattice
M. Moliner, D. C. Cabra, A. Honecker +2
We investigated the classical Shastry-Sutherland lattice under an external magnetic field in order to understand the recently discovered magnetization plateaux in the rare-earth te…
Low-temperature thermodynamics of one class of flat-band models
O Derzhko, J Richter, A Honecker
We consider the antiferromagnetic Heisenberg model and the repulsive Hubbard model for a class of frustrated lattices with a completely dispersionless (flat) lowest one-particle (e…