Subharmonic energy-gap structure and heating effects in superconducting niobium point contacts
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Subharmonic energy-gap structure and heating effects in superconducting niobium point contacts. / Flensberg, Karsten; Hansen, Jørn Bindslev.
I: Physical Review B, Bind 40, Nr. 13, 01.11.1989, s. 8693-8699.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Subharmonic energy-gap structure and heating effects in superconducting niobium point contacts
AU - Flensberg, Karsten
AU - Hansen, Jørn Bindslev
PY - 1989/11/1
Y1 - 1989/11/1
N2 - We present experimental data of the temperature-dependent subharmonic energy-gap structure (SGS) in the current-voltage (I-V) curves of superconducting niobium point contacts. The observed SGS is modified by heating effects. We construct a model of the quasiparticle conductance of metallic superconducting weak links that includes the heating effects self-consistently. Our model is combined with that of Octavio, Blonder, Klapwijk, and Tinkham [Phys. Rev. B 27, 6739 (1983)], which is based on the idea of multiple Andreev scattering in the contact. The shape and the temperature variation of the calculated SGS is found to be in good agreement with the experimental curves for contacts with resistance larger than 5 Ω.
AB - We present experimental data of the temperature-dependent subharmonic energy-gap structure (SGS) in the current-voltage (I-V) curves of superconducting niobium point contacts. The observed SGS is modified by heating effects. We construct a model of the quasiparticle conductance of metallic superconducting weak links that includes the heating effects self-consistently. Our model is combined with that of Octavio, Blonder, Klapwijk, and Tinkham [Phys. Rev. B 27, 6739 (1983)], which is based on the idea of multiple Andreev scattering in the contact. The shape and the temperature variation of the calculated SGS is found to be in good agreement with the experimental curves for contacts with resistance larger than 5 Ω.
U2 - 10.1103/PhysRevB.40.8693
DO - 10.1103/PhysRevB.40.8693
M3 - Journal article
C2 - 9991346
VL - 40
SP - 8693
EP - 8699
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 13
ER -
ID: 129606246