Josephson interferometer in a ring topology as a symmetry prove of Sr_2RuO_4

Details Josephson interferometer in a ring topology as a symmetry prove of Sr_2RuO_4 Josephson interferometer in a ring topology as a symmetry prove of Sr_2RuO_4

2005-02-03

arxiv.org/abs/cond-mat/0502082v2

Physical Review B 71, 214501 (2005).

Physics

Condensed Matter

Superconductivity

7 pages

Scientific paper

10.1103/PhysRevB.71.214501

The Josephson effect is theoretically studied in two types of SQUIDs consisting of $s$ wave superconductor and Sr$_2$RuO$_4$. Results show various response of the critical Josephson current to applied magnetic fields depending on the type of SQUID and on the pairing symmetries. In the case of a $p_x+ip_y$ wave symmetry, the critical current in a corner SQUID becomes an asymmetric function of magnetic fields near the critical temperatures. Our results well explain a recent experimental finding [Nelson et. al, Science \textbf{306}, 1151 (2004)]. We also discuss effects of chiral domains on the critical current.

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