Quantum phase transitions in the Kitaev--Heisenberg model on a single hexagon

Autor:	Gotfryd, Dorota, Oleś, Andrzej M.
Rok vydání:	2015
Předmět:	Condensed Matter - Strongly Correlated Electrons Condensed Matter - Materials Science
Zdroj:	Acta Phys. Polon. A 127, 318 (2015)
Druh dokumentu:	Working Paper
DOI:	10.12693/APhysPolA.127.318
Popis:	We present a detailed analysis of the Kitaev--Heisenberg model on a single hexagon. The energy spectra and spin--spin correlations obtained using exact diagonalisation indicate quantum phase transitions between antiferromagnetic and anisotropic spin correlations when the Kitaev interactions increase. In cluster mean-field approach frustrated nearest neighbor exchange stabilizes the stripe phase in between the N\'eel phase and frustrated one which evolves towards the Kitaev spin liquid. Comment: 3 pages, 3 figures, Euroconference Physics of Magnetism, Pozna\'n 2014
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1503.08204 Zobrazit plný text záznamu View this record from Arxiv