Magnetic susceptibility of frustrated spin-s J1-J2 quantum Heisenberg magnets: High-temperature expansion and exact diagonalization data

17th International Conference on Recent Progress in Many-Body Theories

Richter, J.^1 ; Lohmann, A.^1 ; Schmidt, H.-J.^2 ; Johnston, D.C.^3

Institut für Theoretische Physik, Otto-von-Guericke-Universität Magdeburg, PF 4120, D-39016 Magdeburg, Germany^1

Universität Osnabrück, Fachbereich Physik, Barbarastr. 7, D-49069 Osnabrück, Germany^2

Ames Laboratory, Department of Physics and Astronomy, Iowa State University, Ames, IA 50011, United States^3

关键词: Exact diagonalization;    Frustrated quantum magnets;    Heisenberg magnet;    High-temperature expansion;    Magnetic compounds;    Nearest neighbors;    Spin quantum number;    Susceptibility measurements;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/529/1/012023/pdf
DOI  :  10.1088/1742-6596/529/1/012023

来源: IOP

【 摘 要 】

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 investigate the magnetic susceptibility of two-dimensional J1-J2 Heisenberg models with arbitrary spin quantum number s. We use exact diagonalization and high- temperature expansion up to order 10 to analyze the influence of the frustration strength J2/J1 and the spin quantum number s on the position and the height of the maximum of the susceptibility. The derived theoretical data can be used to get information on the ratio J2/J1 by comparing with susceptibility measurements on corresponding magnetic compounds.