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 ›› 2011, Vol. 22 ›› Issue (5): 299-303 doi: 10.13538/j.1001-8042/nst.22.299-303

• NUCLEAR, HEAVY ION AND ATOMIC PHYSICS • Previous Articles     Next Articles

Angle-resolved photoemission spectra in one-dimensional Hubbard-Holstein model

SUN Peijian~(1,2) HUAI Ping~(1,*) ZHANG Wei~1 CHENG Cheng~1 ZHU Zhiyuan~1   

  1. 1 Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China 2 Graduate University of Chinese Academy of Sciences,Beijing 100049,China
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SUN Peijian, HUAI Ping, ZHANG Wei, CHENG Cheng, ZHU Zhiyuan. Angle-resolved photoemission spectra in one-dimensional Hubbard-Holstein model.Nuclear Science and Techniques, 2011, 22(5): 299-303     doi: 10.13538/j.1001-8042/nst.22.299-303

Abstract:

In order to understand the effects of electron-phonon coupling and Coulomb interactions in angle-resolved photoemission spectroscopy(ARPES),a spin-1/2 Hubbard-Holstein model at half-filling is theoretically investigated by means of the mean field theory and classical Monte Carlo simulation method.It shows that the spectral shape of the one-dimensional system is significantly modified by the electron-phonon coupling and Coulomb interactions.The suppression of charge-density wave in one-dimensional system has been ascribed to the short-range Coulomb repulsion and thermal lattice fluctuations.The competition between these interactions can induce zero energy gaps in APPES as well as complete cancellation of charge or spin ordering.

Key words: ARPES, Electron-phonon coupling, Electron-electron interaction, Monte Carlo simulation