Sboychakov AO, Rakhmanov AL, Kugel KI. Effect of electron-lattice interaction on the phase separation in strongly correlated electron systems with two types of charge carriers.
JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2010;
22:415601. [PMID:
21386599 DOI:
10.1088/0953-8984/22/41/415601]
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Abstract
The effect of electron-lattice interaction is studied for a strongly correlated electron system described by the two-band Hubbard model. A two-fold effect of electron-lattice interaction is taken into account: in non-diagonal terms, it changes the effective bandwidth, whereas in diagonal terms, it shifts the positions of the bands and the chemical potential. It is shown that this interaction significantly affects the doping range corresponding to the electronic phase separation and can even lead to a jump-like transition between states with different values of strains.
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