Наукова електронна бібліотека
періодичних видань НАН України
періодичних видань НАН України
Influence of a single defect on the conductance of a tunnel point contact between a normal metal and a superconductor
Репозиторій DSpace/Manakin
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Influence of a single defect on the conductance of a tunnel point contact between a normal metal and a superconductor
Тема:
Электpонные свойства металлов и сплавов
Інший ID:
PACS: 73.23.-b;72.10.Fk
Посилання:
Influence of a single defect on the conductance of a tunnel point contact between a normal metal and a superconductor / Ye.S. Avotina, Yu.A. Kolesnichenko, J.M. van Ruitenbeek // Физика низких температур. — 2008. — Т. 34, № 11. — С. 1184-1191. — Бібліогр.: 32 назв. — англ.
Підтримка:
One of us (Yu.K) would like to acknowledge useful
discussions with A.N. Omelyanchouk, E.V. Bezuglyi, and
S.V. Kuplevakhsky. This research was supported partially
by the program «Nanosystems nanomaterials, and nanotechnology»
of National Academy of Sciences of Ukraine
and Fundamental Research State Fund of Ukraine (project
F 25.2/122).
Дата:
2008
Переглядів:
722
Завантажень:
324
Анотація:
We have investigated theoretically the conductance of a normal–superconductor point contact in the tunnel
limit and analyzed the quantum interference effects originating from the scattering of quasi-particles by
point-like defects. Analytical expressions for the oscillatory dependence of the conductance on the position
of the defect are obtained for the defect situated either in the normal metal, or in the superconductor. It is
found that the amplitude of oscillations significantly increases when the applied bias approaches the gap energy
of the superconductor. The spatial distribution of the order parameter near the surface in the presence of
a defect is also obtained.
