Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2006, Vol. 17 ›› Issue (6): 334 doi: 10.1016/S1001-8042(07)60003-7


Interaction between photons and electrons

JI Kai   

  1. Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Graduate University for Advanced Studies, Oho 1-1, Tsukuba, Ibaraki 305-0801, Japan
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JI Kai. Interaction between photons and electrons.Nuclear Science and Techniques, 2006, 17(6): 334     doi: 10.1016/S1001-8042(07)60003-7

Abstract: By using a path-integral theory, the photoemission spectra of the electron-phonon (e-ph) coupled systems are calculated exactly. The spectral properties of the e-ph coupled systems based on the 1D and 2D Holstein models are systematically studied under various conditions. The electronic band structure is found to be greatly modified by the multiple scattering effect of electron with phonons, so as to produce a spectral evolution from broad Gaussian at band bottom to two-headed Lorentzian near the Fermi energy. This evolution reflects a transition of electronic states from localized incoherent one to the extended coherent one near the Fermi energy. The results qualitatively agree with recent experiments of high resolution ARPES on the Be (0001) surface and Bi2Sr2CaCu2O8.

Key words: Angle-resolved photoemission spectroscopy, Electron-phonon interaction, Synchrotron radiation