89 citations · 256 across the 8 of their papers we have counts for
8 papers
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…
Eighth-order high-temperature expansion for general Heisenberg Hamiltonians
Heinz-Jürgen Schmidt, Andre Lohmann, Johannes Richter
We explicitly calculate the moments of general Heisenberg Hamiltonians up to eighth order. They have the form of finite sums of products of two factors. The first factor is r…
Moments of general Heisenberg Hamiltonians up to sixth order
Heinz-Juergen Schmidt, Andre Lohmann, Johannes Richter
We explicitly calculate the moments t_n of general Heisenberg Hamiltonians up to sixth order. They have the form of finite sums of products of two factors, the first factor being r…