Influence of quasiparticle multi-tunneling on the energy flow through the superconducting tunnel junction

Conference · Fri Jul 01 04:00:00 EDT 2011

DOI:https://doi.org/10.1109/ANIMMA.2011.6172862· OSTI ID:22039893

Samedov, V V; Tulinov, B M ^[1]

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1. National Research Nuclear Univ. - Moscow Engineering Physics Inst., 31, Kashirskoye Shosse, 115409, Moscow (Russian Federation)

Superconducting tunnel junction (STJ) detector consists of two layers of superconducting material separated by thin insulating barrier. An incident particle produces in superconductor excess nonequilibrium quasiparticles. Each quasiparticle in superconductor should be considered as quantum superposition of electron-like and hole-like excitations. This duality nature of quasiparticle leads to the effect of multi-tunneling. Quasiparticle starts to tunnel back and forth through the insulating barrier. After tunneling from biased electrode quasiparticle loses its energy via phonon emission. Eventually, the energy that equals to the difference in quasiparticle energy between two electrodes is deposited in the signal electrode. Because of the process of multi-tunneling, one quasiparticle can deposit energy more than once. In this work, the theory of branching cascade processes was applied to the process of energy deposition caused by the quasiparticle multi-tunneling. The formulae for the mean value and variance of the energy transferred by one quasiparticle into heat were derived. (authors)

• OSTI ID: 22039893
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BRANCHING RATIO
ELECTRODES
ELECTRONS
EMISSION
ENERGY TRANSFER
EXCITATION
HOLES
PHONONS
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TUNNEL EFFECT