Fermi-Loquid Theory for a Conductance though an Interacting Region Attached to Noninteracting Leads
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概要
- 論文の詳細を見る
We study the conductance for the current through a finite interacting, possibly disorderedregion attached to two noninteracting leads within the Kubo forrnalism applying the perturbationtheory for the local Fermi Iiqtnid developed by Yamada & Yosida and by Shiba to this finiteregion. Assuming the validity of the perturbation expansion in the Coulomb interaction and thetime reversal symmetry for the normal scattering potential in the finite region, we find that thecontributions of the vertex correction to the dc conductance disappear at T O 0 if the currents aremeasured in the leads. Consequently, the conductance is expressed as g o (2e'/h) IZ(0)l'. Here#(0) is the transmission coefficient for single-particle-like excitation at the Fermi energy and isintroduced by using the Green's function. The results are generalized to a quasi-one-diunensionalsystem with a number of scattering channels.
- 社団法人日本物理学会の論文
- 1997-05-15
著者
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Oguri Akira
Department Of Applied Physics Nagoya University
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Ogura Akira
Department Of Material Science Faculty Osaka University
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