Publication
Title
Quantum transport theory for the ac response of interacting resonant-tunneling devices
Author
Abstract
We present an analytical approach to the frequency response of the interacting resonant-tunneling devices (RTD's) to a small ac signal voltage. Within the wideband assumption for the lead electrons and Hartree approximation for the tunneling effect, we obtain a compact formula for the sc conductance. This has an interesting structure in that the geometry factor of the device is separated out from the interaction in the device. This feature allows us to get some physical insight into the effect of resonance and interaction on the ac response. In particular, we interpret the ac response in the physical picture of photon-assisted resonance between the Fermi surface and the central electron spectrum. The consistency between our result and other approaches is shown for the noninteracting system. We also apply our formula to the ac response of interacting RTD's, where the Hubbard electron-electron interaction in the resonant region is taken into account, and the remarkable features of charging effects on the ac response are presented.
Language
English
Source (journal)
Physical review : B : condensed matter and materials physics. - Lancaster, Pa, 1998 - 2015
Publication
Lancaster, Pa : 1996
ISSN
1098-0121 [print]
1550-235X [online]
Volume/pages
54:15(1996), p. 10807-10813
ISI
A1996VT67400084
Full text (Publishers DOI)
Full text (publishers version - intranet only)
UAntwerpen
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 29.02.2012
Last edited 27.05.2017
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