Josephson π State in a Ferromagnetic Insulator

• Kawabata, Shiro

• Asano, Yasuhiro

• Tanaka, Yukio

• Golubov, Alexander A.

• Kashiwaya, Satoshi

Abstract

We predict anomalous atomic-scale 0-π transitions in a Josephson junction with a ferromagnetic-insulator (FI) barrier. The ground state of such junction alternates between 0 and π states when thickness of FI is increasing by a single atomic layer. We find that the mechanism of the 0-π transition can be attributed to thickness-dependent phase shifts between the wave numbers of electrons and holes in FI. Based on these results, we show that a stable π state can be realized in junctions based on high-Tc superconductors with a La2BaCuO5 barrier.

Journal

• Physical Review Letters

  Physical Review Letters 104 (11), 117002-, 2010-03-19

  American Physical Society

Details

• CRID: 1050564288963961856
• NII Article ID: 120003783340
• ISSN: 10797114
• ISSN: 00319007
• HANDLE: 2115/48283
• Text Lang: en
• Article Type: journal article
• Data Source:
  • IRDB
  • CiNii Articles