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- Title
Long-range Josephson effect controlled by temperature gradient and circuit topology.
- Authors
Kalenkov, Mikhail S.; Zaikin, Andrei D.
- Abstract
We demonstrate that the supercurrent can be strongly enhanced in cross-like superconducting hybrid nanostructures (X-junctions) exposed to a temperature gradient. At temperatures T exceeding the Thouless energy of our X-junction, the Josephson current decays algebraically with increasing T and can be further enhanced by a proper choice of the circuit topology. At large values of the temperature gradient, the non-equilibrium contribution to the supercurrent may become as large as the equilibrium one at low T. We also predict a variety of transitions between 0- and π -junction states controlled by the temperature gradient as well as by the system geometry. Our predictions can be directly verified in modern experiments.
- Subjects
JOSEPHSON effect; TEMPERATURE control; TEMPERATURE effect; TOPOLOGY
- Publication
European Physical Journal: Special Topics, 2021, Vol 230, Issue 4, p813
- ISSN
1951-6355
- Publication type
Article
- DOI
10.1140/epjs/s11734-021-00065-5