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Author Blaauboer, M. ♦ Koperdraad, R. T. ♦ Lodder, A. ♦ Lenstra, D.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS ♦ SUPERCONDUCTING DEVICES ♦ ENERGY-LEVEL DENSITY ♦ BOUND STATE ♦ HETEROJUNCTIONS ♦ ELECTRIC CONTACTS ♦ SIZE ♦ TUNNEL EFFECT ♦ ENERGY GAP ♦ GREEN FUNCTION
Abstract The quasiparticle local density of states (LDOS) is studied in clean normal-metal{endash}superconductor (NS) and superconductor{endash}normal-metal{endash}superconductor (SNS) junctions with increasing transverse size, from quasi-one-dimensional to three-dimensional. It is shown that finite transverse dimensions are related to pronounced effects in the LDOS, such as fast oscillations superimposed on the quasiparticle interference oscillations (for NS) and additional peaks in the bound state spectrum in the subgap region (for SNS). Also, the validity of the Andreev approximation is discussed. It turns out to be an acceptable approximation in all situations tested. {copyright} {ital 1996 The American Physical Society.}
ISSN 01631829
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-08-01
Publisher Place United States
Journal Physical Review, B: Condensed Matter
Volume Number 54
Issue Number 6


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