期刊
PHYSICAL REVIEW B
卷 61, 期 16, 页码 10651-10663出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.61.10651
关键词
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The electron-phonon interaction in low-dimensional tight-binding systems is discussed. A sheet of graphite, which is two-dimensional, and an armchair single-wall carbon nanotube (SWNT), which is quasi-one-dimensional, are taken as examples. For the modulated hopping the matrix elements for both systems are derived in the context of a two parameter model. for the phonon vibrational spectrum. It is found that they (for both structures) display a deformation type of potential, and are reduced by a factor of (I-R), where R depends on the phonon parameters. It is also shown that the ordinary electron-phonon coupling displays a deformation type of approximation for both systems. Next, a different type of interaction is considered-the phonon modulated electron-electron interaction. It gives two contributions-random phase approximation with one phonon Line and exchange interaction with one phonon line. We find that for the two-dimensional (2D) graphene and for the quasi-ID (10,10) SWNT, the modulated hopping and exchange coupling govern the electron transport at room temperatures.
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