Renormalization of the chemical potential due to multiphonon effects at the surface of metals

doi:10.1088/1674-1056/21/10/107301

Abstract We study the relation between renormalization of the chemical potential due to multiphonon effects at the surface of Be(0001) and doping by solving the strong-coupling self-consistent equations of a two-dimensional (2D) electron-phonon interaction system. We present the quasiparticle dispersions and inverse lifetimes of a 2D electron system interacting with Einstein phonons under the different dopings (corresponding to chemical potentials). We find that the effect of electron-phonon interaction on electron structure is strongest at the half filling, but it has no effect on the chemical potential. However, the chemical potential shows distinct renormalization effects away from half filling due to the electron-phonon interaction.

Keywords: kink structure electron-phonon coupling renormalization of chemical potential

Received: 06 March 2012
Revised: 16 April 2012
Accepted manuscript online:

PACS:	73.20.At	(Surface states, band structure, electron density of states)
	71.38.-k	(Polarons and electron-phonon interactions)
	71.10.Ay	(Fermi-liquid theory and other phenomenological models)
	79.60.Bm	(Clean metal, semiconductor, and insulator surfaces)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10574063).

Corresponding Authors: Ma Lei
E-mail: leima_1017@163.com

Cite this article:

Ma Lei (马磊), Kang Guang-Zhen (康广振), Li Jun (李俊) Renormalization of the chemical potential due to multiphonon effects at the surface of metals 2012 Chin. Phys. B 21 107301

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Renormalization of the chemical potential due to multiphonon effects at the surface of metals

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