Time-Dependent Wave-Packet Diffusion Method for Quantum Transport Calculation: From Diffusive to Ballistic Regimes

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概要

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• We developed a time-dependent wave-packet diffusion method for quantum electron transport calculations. This method enables us to treat the transport problems of huge systems of up to 10 million atoms under impurity scattering and electron--phonon coupling. By combining our method with molecular dynamics simulations, we can treat the electron transport from diffusive to ballistic regimes from an atomistic viewpoint. To demonstrate the method, we investigated the transport properties of metallic carbon nanotubes and the channel-length dependence of their resistance from diffusive to ballistic regimes. The obtained mean free path and relaxation time are consistent with experimental observations.

• Japan Society of Applied Physicsの論文
• 2008-12-25

著者

• Kobayashi Nobuhiko

  Institute Of Applied Physics University Of Tsukuba

• Hirose Kenji

  Nano Electronics Research Laboratories Nec Corporation

• ISHII Hiroyuki

  National Institute of Advanced Industrial Science and Technology (AIST)

• Hirose Kenji

  Green Innovation Research Laboratory Nec Corporation

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