We study the anomalous Josephson effect in a nanowire with Rashba spin-orbit interaction and Zeeman spin splitting, contacted with two s-wave superconducting leads with either one or two open conducting channels in the wire. In both cases, we find that the Josephson current is zero at a value φ0 = 0, π of the phase difference between the order parameter of the leads. While in the former case the critical current is direction independent, in the latter case we observe an asymmetry between Ic+ (the maximum Josephson current from left to right) and Ic− up to about 20%.

Josephson Current Anomalies in Spin-Orbit Nanowires

Campagnano, Gabriele
;
GIULIANO, ROSA;Giuliano, Domenico;TAGLIACOZZO, ARTURO
2018-01-01

Abstract

We study the anomalous Josephson effect in a nanowire with Rashba spin-orbit interaction and Zeeman spin splitting, contacted with two s-wave superconducting leads with either one or two open conducting channels in the wire. In both cases, we find that the Josephson current is zero at a value φ0 = 0, π of the phase difference between the order parameter of the leads. While in the former case the critical current is direction independent, in the latter case we observe an asymmetry between Ic+ (the maximum Josephson current from left to right) and Ic− up to about 20%.
2018
Josephson junction
Quantum Nanowires
Superconductivity
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11770/285367
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 1
  • ???jsp.display-item.citation.isi??? 1
social impact