Physics
Berezinskii—Kosterlitz—Thouless correlations in copper-based quasi-2D spin systems (Review Article)
Document Type
Article
Abstract
We present an overview of selected copper-based quasi-2D square-lattice spin-1/2 materials with an easy-plane anisotropy, providing the possibility to study emergent Berezinskii-Kosterlitz-Thouless (BKT) correlations. In particular, in those materials with a comparatively small exchange coupling, the effective XY anisotropy of the low-temperature spin correlations can be controlled by an applied magnetic field, yielding a systematic evolution of the BKT correlations. In cases where the residual interlayer correlations are small enough, dynamical BKT correlations in the critical regime may be observed experimentally, whereas the completion of the genuine BKT transition is preempted by the onset of long-range order. © 2023 Author(s).
Publication Title
Low Temperature Physics
Publication Date
7-1-2023
Volume
49
Issue
7
First Page
819
Last Page
826
ISSN
1063-777X
DOI
10.1063/10.0019692
Keywords
BKT transition, easy-plane anistropy, Heisenberg model, long-range order, Nuclear magnetic resonance, spin-1/2 square lattice, XY model
Repository Citation
Opherden, D.; Bärtl, F.; Tepaske, M.S.J.; Landee, C.P; Wosnitza, J.; and Kühne, H., "Berezinskii—Kosterlitz—Thouless correlations in copper-based quasi-2D spin systems (Review Article)" (2023). Physics. 5.
https://commons.clarku.edu/faculty_physics/5