SPECTRAL PROPERTIES OF SMALL-POLARON SYSTEMS

被引：30

作者：

RANNINGER, J

机构：

[1] Centre de Recherches sur les Tre's Basses Températures, CNRS, 38042 Grenoble Cedex 9

来源：

PHYSICAL REVIEW B | 1993年 / 48卷 / 17期

关键词：

D O I：

10.1103/PhysRevB.48.13166

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Small polarons, being composite particles in which the charge degrees of freedom and the lattice vibrational modes are locked together, show unique features in their single-particle spectral properties. The occupation number n(k) of the polaronic charge carriers is finite and roughly constant throughout the entire Brillouin zone; with only a small jump at k(F). Strongly temperature-dependent incoherent contributions to the photoemission spectrum and the occurrence of a polaron-induced vibrational mode in the neutron scattering cross section are indications for small polarons in band states.

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页码：13166 / 13169

页数：4

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