165 citations · 316 across the 9 of their papers we have counts for
9 papers
Ground-state fidelity of the spin-1 Heisenberg chain with single ion anisotropy: quantum renormalization group and exact diagonalization approaches
A. Langari, F. Pollmann, M. Siahatgar
We study the phase diagram of the anisotropic spin-1 Heisenberg chain with single ion anisotropy (D) using a ground-state fidelity approach. The ground-state fidelity and its corre…
Moment screening in the correlated Kondo lattice model
M. Siahatgar, B. Schmidt, G. Zwicknagl +1
The magnetic correlations, local moments and the susceptibility in the correlated 2D Kondo lattice model at half filling are investigated. We calculate their systematic dependence…
Staggered moment dependence on field-tuned quantum fluctuations in 2D frustrated antiferromagnets
Mohammad Siahatgar, Burkhard Schmidt, Peter Thalmeier
We propose an efficient method to identify the degree of frustration in quasi-2D antiferromagnets described by the J_1-J_2 Heisenberg model. The frustration ratio J_2/J_1 is usuall…
Ordered moment in the anisotropic and frustrated square lattice Heisenberg model
Burkhard Schmidt, Mohammad Siahatgar, Peter Thalmeier
The two-dimensional frustrated next nearest neighbor Heisenberg model on the square lattice is a prime example for a spin system where quantum fluctuations can either destroy or st…
Frustrated local moment models for Fe-pnictide magnetism
Burkhard Schmidt, Mohammad Siahatgar, Peter Thalmeier
The low energy spin excitations of the Fe pnictide parent compounds have been determined by inelastic neutron scattering and interpreted within the local moment J_1a,b-J_2 Heisenbe…
The two-dimensional frustrated Heisenberg model on the orthorhombic lattice
Burkhard Schmidt, Mohammad Siahatgar, Peter Thalmeier +1
We discuss new high-field magnetization data recently obtained by Tsirlin et al. for layered vanadium phosphates in the framework of the square-lattice model. Our predictions for t…