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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2006, Volume 83, Issue 12, Pages 659–663
(Mi jetpl1332)
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This article is cited in 12 scientific papers (total in 12 papers)
CONDENSED MATTER
Topological quantization of current in quantum tunnel contacts
S. A. Bulgadaev Landau Institute for Theoretical Physics RAS
Abstract:
It is shown that an account of the Berry phase (a topological $\theta$-term) together with a dissipative term in the effective action $S[\phi]$ of the tunnel contacts induces a strong quantization of the tunnel current at low temperatures. This phenomenon like the Coulomb blockade reflects a discrete charge structure of the quantum shot noise and can ensure a quantization of the tunnel current without a capacitive charging energy $E_C$, when the latter is strongly suppressed by quantum fluctuations. Since a value of the $\theta$-parameter is determined by the gate voltage, this effect allows to control a current through the contact. A possible physical application of this effect is proposed.
Received: 15.05.2006
Citation:
S. A. Bulgadaev, “Topological quantization of current in quantum tunnel contacts”, Pis'ma v Zh. Èksper. Teoret. Fiz., 83:12 (2006), 659–663; JETP Letters, 83:12 (2006), 563–567
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https://www.mathnet.ru/eng/jetpl1332 https://www.mathnet.ru/eng/jetpl/v83/i12/p659
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