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Ballistic transport in quantum cylinders

✍ Scribed by A.V. Chaplik; D.A. Romanov; L.I. Magarill

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
79 KB
Volume
23
Category
Article
ISSN
0749-6036

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✦ Synopsis

We theoretically investigate the ballistic conductance of hollow quantum wires made of a two-dimensional electron gas occupying a cylindrical surface. The dependence of the conductance on the electron Fermi momentum differs drastically from the conventional case of a strip-like wire. We trace the evolution between these two cases in an exactly solvable model of a circular cylinder affected by a Ξ΄-like potential barrier along its element. We consider also a cylinder with two diametrically opposite Ξ΄-function barriers, the case representing somewhat realistic semiconductor structures. The general consequences of the boundary condition topology are also discussed.

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