Frustrated kagome-lattice bilayer quantum Heisenberg antiferromagnet
We consider the <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mrow><a:mi>S</a:mi><a:mo>=</a:mo><a:mn>1</a:mn><a:mo>/</a:mo><a:mn>2</a:mn></a:mrow></a:math> antiferromagnetic Heisenberg model on a frustrated kagome-lattice bilayer with strong nearest-neighbor interlayer coupling and examine its low-temperature magnetothermodynamics using a mapping onto a rhombi gas on the kagome lattice. Besides, we use finite-size numerics to illustrate the validity of the classical lattice-gas description. Among our findings there are (i) the absence of an order-disorder phase transition and (ii) the sensitivity of the specific heat at low temperatures to the shape of the system just below the saturation magnetic field even in the thermodynamic limit.
Authors
- Oleg Derzhko (ORCID: https://orcid.org/0000-0002-4187-0518)
- Johannes Richter (ORCID: https://orcid.org/0000-0002-5630-3786)
- Taras Hutak (ORCID: https://orcid.org/0000-0002-3601-0601)
- Taras Krokhmalskii (ORCID: https://orcid.org/0000-0003-4186-5599)
- Vasyl Baliha (ORCID: https://orcid.org/0000-0002-6080-7266)
- Jürgen Schnack (ORCID: https://orcid.org/0000-0003-0702-2723)
- Karl J. Friston
Institutions
- National Academy of Sciences of Ukraine (UA)
- Lviv University (UA)
- Bielefeld University (DE)
- Yukhnovskii Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine (UA)
- Otto-von-Guericke-Universität Magdeburg (DE)
- Lviv Polytechnic National University (UA)
Publication Details
- Journal
- Physical review. B./Physical review. B
- Published
- 2025-06-16
- DOI
- https://doi.org/10.1103/1rzb-s69p
- Citations
- 2
- Primary Topic
- Advanced Condensed Matter Physics
- Type
- article
- Field-Weighted Citation Impact
- 2.52