Polaron features of the one-dimensional Holstein molecular crystal model

Article

关键词: LATTICE POLARON;    EFFECTIVE-MASS;    LA0.7CA0.3MNO3;    BIPOLARONS;    ABSORPTION;    TRANSITION;    ELECTRON;   

DOI  :  10.1103/PhysRevB.62.1496

来源: SCIE

【 摘 要 】

The polaron features of the one-dimensional Holstein model are investigated by improving a variational method introduced recently and based on a Linear superposition of Bloch states that describe large and small polaron wave functions. The mean number of phonons, the polaron kinetic energy, the electron-phonon local correlation function, and the ground-state spectral weight are calculated and discussed. A crossover regime between large and small polarons for any value of the adiabatic parameter omega(0)/t is found and a polaron phase diagram is proposed.

【 授权许可】

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