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

Abstract

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 Néel phase and frustrated one which evolves towards the Kitaev spin liquid.

arXiv comment3 pages, 3 figures, Euroconference Physics of Magnetism, Poznań 2014

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Cited by in corpus (1)

• Phase diagram and spin correlations of the Kitaev-Heisenberg model: Importance of quantum effects