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  1. 1 Acta Physica Polonica A

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  1. 1 2015

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  1. 1 Gotfryd D.

  2. 1 Oleś A.

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Quantum Phase Transitions in the Kitaev-Heisenberg Model on a Single Hexagon

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Gotfryd D., Oleś A.
Acta Physica Polonica A
|
2015
|
vol. 127
|
issue 2
318-320
EN
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.
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