Contribution of interband effects caused by long-wavelength transverse optical phonons to electron-phonon coupling in doped polar insulators

Details Contribution of interband effects caused by long-wavelength transverse optical phonons to electron-phonon coupling in doped polar insulators Contribution of interband effects caused by long-wavelength transverse optical phonons to electron-phonon coupling in doped polar insulators

2010-11-11

arxiv.org/abs/1011.2701v1

Physics

Condensed Matter

Materials Science

5 pages, 3 tables

Scientific paper

We estimate the contribution of the long-wavelength el-TO-ph interaction and discuss the effect it has on electron pairing in doped polar systems like SrTiO3 and PbTe. The analytical and numerical results presented in the study indicate that the el-TO-ph interaction tends to contribute little to the total strength of electron-phonon coupling in these and related materials. To explain this fact we consider possible reasons why the effect of the polar long-wavelength transverse optical phonons on the coupling constant "lambda" is far less than one might suppose.

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