Theoretical description of electron-phonon Fock space for gapless and gapped nanowires  

作　　者：Ashrafalsadat Shariati Hassan Rabani Mohammad Mardaani 

机构地区：[1]Department of Physics, Faculty of Science, Shahrekord University, P. O. Box 115, Shahrekord, Iran [2]Nanotechnology Research Center, Shahrekord University, 8818634141, Shahrekord, Iran

出　　处：《Chinese Physics B》2017年第3期404-409,共6页中国物理B（英文版）

基　　金：Project supported by the Iranian Nanotechnology Initiative;supported by Shahrekord University through a research fund

摘　　要：We study the effect of electron-phonon （e-ph） interaction on the elastic and inelastic electronic transport of a nanowire connected to two simple rigid leads within the tight-binding and harmonic approximations. The model is constructed using Green＇s function and multi-channel techniques, taking into account the local and nonlocal e-ph interactions. Then, we examine the model for the gapless （simple chain） and gapped （PA-like nanowire） systems. The results show that the tunneling conductance is improved by the e-ph interaction in both local and nonlocal regimes, while for the resonance conductance, the coherent part mainly decreases and the incoherent part increases. At the corresponding energies which depend on the phonon frequency, two dips in the elastic and two peaks in the inelastic conductance spectra appear. The reason is the absorption of the phonon by the electron in transition into inelastic channels.We study the effect of electron-phonon （e-ph） interaction on the elastic and inelastic electronic transport of a nanowire connected to two simple rigid leads within the tight-binding and harmonic approximations. The model is constructed using Green＇s function and multi-channel techniques, taking into account the local and nonlocal e-ph interactions. Then, we examine the model for the gapless （simple chain） and gapped （PA-like nanowire） systems. The results show that the tunneling conductance is improved by the e-ph interaction in both local and nonlocal regimes, while for the resonance conductance, the coherent part mainly decreases and the incoherent part increases. At the corresponding energies which depend on the phonon frequency, two dips in the elastic and two peaks in the inelastic conductance spectra appear. The reason is the absorption of the phonon by the electron in transition into inelastic channels.

关 键 词：Theoretical description of electron phonon Fock space for gapless and gapped nanowires 

分 类 号：TB383.1[一般工业技术—材料科学与工程]