Abstract
The relationship is established between the Berry phase and spin crossover in condensed matter physics induced by high pressure. It is shown that the geometric phase has topological origin and can be considered as the order parameter for such transition.
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Nesterov, A.I., Ovchinnikov, S.G. Spin crossover: the quantum phase transition induced by high pressure. Jetp Lett. 90, 530–534 (2009). https://doi.org/10.1134/S0021364009190072
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DOI: https://doi.org/10.1134/S0021364009190072