Potential barrier model incorporating localized states explaining tunnel anomalies
Journal Article
·
· J. Appl. Phys.; (United States)
Most tunnel barriers contain localized electronic states n/sub l/(..delta..x, epsilon) in large amounts decreasing with distance ..delta..x from the metal. The localized states hybridize with conduction electrons forming interface states with a decay width ..delta../sub l/proportionalexp(-2..delta..xkappa) and a correlation energy ..delta..U* proportional 1/epsilon/sub r/..delta..x. For ..delta..U*>..delta../sub l/ these states are localized, which yields a strong coupling to surface plasmons, phonons, and spins. These states cause diffuse surface scattering and enhance exponentially (proportional ..delta../sup -1//sub l/ proportionalexp(+2..delta..xkappa)) the tunnel matrix element by resonant tunneling j/sup R/ as compared to tunneling j/sup phi-bar/ through the whole potential barrier phi-bar. Consequently at voltages Vertical BareUVertical Bar
- Research Organization:
- Kernforschungszentrum Karlsruhe GmbH, Institute fuer Kernphysik II, Postfach 3640, D-7500 Karlsruhe 1, Federal Republic of Germany
- OSTI ID:
- 5558500
- Journal Information:
- J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 58:3; ISSN JAPIA
- Country of Publication:
- United States
- Language:
- English
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656101* -- Solid State Physics-- Superconductivity-- General Theory-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
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656101* -- Solid State Physics-- Superconductivity-- General Theory-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CAPACITANCE
CURRENTS
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
ELECTRONIC STRUCTURE
JUNCTIONS
LEAKAGE CURRENT
NOISE
PHONONS
PHYSICAL PROPERTIES
PLASMONS
POTENTIALS
QUASI PARTICLES
SUPERCONDUCTING JUNCTIONS
TUNNEL EFFECT