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

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

中国物理B ›› 2012, Vol. 21 ›› Issue (10): 107301-107301.doi: 10.1088/1674-1056/21/10/107301

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

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

马磊^{a b}, 康广振^a, 李俊^a

a National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China;
b Department of Optics and Electronic Engineering, Zaozhuang University, Zaozhuang 277160, China

收稿日期:2012-03-06 修回日期:2012-04-16 出版日期:2012-09-01 发布日期:2012-09-01
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 10574063).

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

Ma Lei (马磊)^{a b}, Kang Guang-Zhen (康广振)^a, Li Jun (李俊)^a

a National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China;
b Department of Optics and Electronic Engineering, Zaozhuang University, Zaozhuang 277160, China

Received:2012-03-06 Revised:2012-04-16 Online:2012-09-01 Published:2012-09-01
Contact: Ma Lei E-mail:leima_1017@163.com
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 10574063).

摘要/Abstract

摘要： 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.

关键词: kink structure, electron-phonon coupling, renormalization of chemical potential

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.

Key words: kink structure, electron-phonon coupling, renormalization of chemical potential

中图分类号: (Surface states, band structure, electron density of states)

73.20.At

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)

马磊, 康广振, 李俊. Renormalization of the chemical potential due to multiphonon effects at the surface of metals[J]. 中国物理B, 2012, 21(10): 107301-107301.

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[J]. Chin. Phys. B, 2012, 21(10): 107301-107301.

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

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

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