Berlin 2024 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 80: Correlated Electrons: Poster

TT 80.27: Poster

Donnerstag, 21. März 2024, 15:00–18:00, Poster E

Thermodynamic properties of the triangular lattice XXZ model — •Alexander Schwenke and Wolfram Brenig — Institute for Theoretical Physics, Technical University Braunschweig, D-38106 Braunschweig, Germany

Motivated by its rich ground-state phase diagram, we investigate the triangular lattice XXZ model as a prime example to benchmark the numerical linked cluster expansion (NLCE) as a method for the study of geometrically frustrated quantum magnets. We employ a single-site representation in order to evaluate thermodynamic properties in a finite magnetic field B^→. To this end we present results for the internal energy, the specific heat, the magnetization, and the magnetic susceptibility for clusters of sizes up to ∼O(11) sites. Supplementing these calculations with exact diagonalization results, we discuss various cuts in the J−B^→ plane.

Keywords: Triangular lattice; XXZ model; NLCE