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Erschienen in:
1998 | OriginalPaper | Buchkapitel
Landauer’s Formula
verfasst von : T. Ando
Erschienen in: Mesoscopic Physics and Electronics
Verlag: Springer Berlin Heidelberg
Enthalten in: Professional Book Archive
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Landauer derived the relation between the conductance of a one-dimensional (1D) wire and the transmission and reflection probabilities at the Fermi level [1]. Let us consider the system schematically illustrated in Fig. 1.3.1. A wire is connected at both ends to an ideal wire which is infinitely long and eventually connected to an electron reservoir. The ideal reservoir satisfies the following two conditions: (1)All incident electrons are absorbed by the reservoir irrespective of their energy and phase.(2)It constantly provides electrons with energy below chemical potential µ. The energy and phase of these electrons are independent of those of absorbed electrons.