Journal ArticleDOI
Spatial variation of currents and fields due to localized scatterers in metallic conduction
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In this article, the electric field is associated only with space charge but not with a current, and approximate space charge neutrality is restored, by adding a particular solution of the transport equation in which the electric fields are associated with a specific dipole field about each scatterer.Abstract:
Localized scatterers can be expected to give rise to spatial variations in the electric field and in the current distribution. The transport equation allowing for spatial variations is solved by first considering the homogeneous transport equation which omits electric fields. The homogeneous solution gives the purely diffusive motion of current carriers and involves large space charges. The electric field is then found, and approximate space charge neutrality is restored, by adding a particular solution of the transport equation in which the electric field is associated only with space charge but not with a current. The presence of point scatterers leads to a dipole field about each scatterer. The spatial average of a number of these dipole fields is the same as that obtained by the usual approach which does not explicitly consider the spatial variation. Infinite plane obstacles with a reflection coefficient r are also considered. These produce a resistance proportional to r/(1-r).read more
Citations
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Making sense of non-Hermitian Hamiltonians
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References
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Journal ArticleDOI
Quantum theory of solids
Rudolf Peierls,Louis D. Roberts +1 more
TL;DR: In this article, the interaction of light with non-conducting crystals has been studied in the context of crystal lattices and its applications in general theory and applications, such as semi-conductivity and superconductivity.
Journal ArticleDOI
Generalized many-channel conductance formula with application to small rings.
TL;DR: The dependence on channel number N of the contributions to the conductance of a small ring, periodic in the Aharonov-Bohm flux through it is obtained, and terms whose period is h/e as well as those with period h/2e vary with N as 1/N.
Journal ArticleDOI
Four-terminal phase-coherent conductance.
TL;DR: A conductance formula for a sample of arbitrary shape with four terminals is derived to describe transport in the limit where carriers can traverse the sample without suffering phase-destroying events.