SKM 2023 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 42: Poster: Correlated Electrons I

TT 42.18: Poster

Mittwoch, 29. März 2023, 15:00–18:00, P2/OG2

Magnetostriction in frustrated planar quantum magnets — •Alexander Schwenke and Wolfram Brenig — Institute for Theoretical Physics, Technical University Braunschweig, D-38106 Braunschweig, Germany

Using the numerical linked cluster expansion (NLCE) focussing on the single-site representation, we study the field-induced thermodynamic and magnetoelastic properties of paradigmatic frustrated planar spin models. Results are presented for the energy, the specific heat and the magnetization. Employing simple magnetoelastic modelling we calculate the linear magnetostriction coefficient versus temperature and external magnetic field. In particular we consider magnetostriction at field-induced quantum phase transitions. Results obtained for the generalized Kitaev honeycomb model are extended to include findings on the anisotropic triangular Heisenberg antiferromagnet.