89 citations · 256 across the 8 of their papers we have counts for
6 papers · 1 filter
Thermodynamics of the pyrochlore-lattice quantum Heisenberg antiferromagnet
Patrick Müller, Andre Lohmann, Johannes Richter +1
We use the rotation-invariant Green's function method (RGM) and the high-temperature expansion (HTE) to study the thermodynamic properties of the Heisenberg antiferromagnet on the…
Thermodynamics of the pyrochlore Heisenberg ferromagnet with arbitrary spin
Patrick Müller, Andre Lohmann, Johannes Richter +2
We use the rotation-invariant Green's function method (RGM) and the high-temperature expansion (HTE) to study the thermodynamic properties of the spin- Heisenberg ferromagnet on…
Interpolation between low and high temperatures of the specific heat for spin systems
Heinz-Jürgen Schmidt, Andreas Hauser, Andre Lohmann +1
The high temperature expansion (HTE) of the specific heat of a spin system fails at low temperatures, even if it is combined with a Padé approximation. On the other hand we often h…
High-temperature expansion for frustrated magnets: Application to the J1-J2 model on the BCC lattice
Johannes Richter, Patrick Müller, Andre Lohmann +1
We present the high-temperature expansion up to 11th order for the specific heat and the uniform susceptibility and up to 9th order for the structure factor o…
Magnetic susceptibility of frustrated spin-s J1-J2 quantum Heisenberg magnets: High-temperature expansion and exact diagonalization data
J. Richter, A. Lohmann, H. -J. Schmidt +1
Motivated by recent experiments on low-dimensional frustrated quantum magnets with competing nearest-neighbor exchange coupling J1 and next nearest-neighbor exchange coupling J2 we…
Tenth-order high-temperature expansion for the susceptibility and the specific heat of spin-s Heisenberg models with arbitrary exchange patterns: Application to pyrochlore and kagome magnets
Andre Lohmann, Heinz-Jürgen Schmidt, Johannes Richter
We present the high-temperature expansion (HTE) up to 10th order of the specific heat C and the uniform susceptibility χfor Heisenberg models with arbitrary exchange patterns and a…