Long-range Josephson effect controlled by temperature gradient and circuit topology

Autor:	Kalenkov, Mikhail S., Zaikin, Andrei D.
Rok vydání:	2020
Předmět:	Condensed Matter - Superconductivity
Zdroj:	Eur. Phys. J. Spec. Top. 230, 813 (2021)
Druh dokumentu:	Working Paper
DOI:	10.1140/epjs/s11734-021-00065-5
Popis:	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 $\pi$-junction states controlled by the temperature gradient as well as by the system geometry. Our predictions can be directly verified in modern experiments. Comment: 10 pages, 5 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2012.07366 Zobrazit plný text záznamu View this record from Arxiv