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APS » Journals » Phys. Rev. Lett. » Volume 101 » Issue 18
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Phys. Rev. Lett. 101, 187003 (2008) [4 pages]

Spontaneous Spin Accumulation in Singlet-Triplet Josephson Junctions

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K. Sengupta1,2 and Victor M. Yakovenko3
1TCMP division, Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata-700064, India
2Theoretical Physics Department, Indian Association for the Cultivation of Sciences, Kolkata-700032, India
3Joint Quantum Institute and Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park, Maryland 20742-4111, USA

Received 11 July 2008; published 30 October 2008

We study the Andreev bound states in a Josephson junction between a singlet and a triplet superconductors. Because of the mismatch in the spin symmetries of pairing, the energies of the spin-up and -down quasiparticles are generally different. This results in imbalance of spin populations and net spin accumulation at the junction in equilibrium. This effect can be detected using probes of local magnetic field, such as the scanning SQUID, Hall, and Kerr probes. It may help to identify potential triplet pairing in (TMTSF)2X, Sr2RuO4, and oxypnictides.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.101.187003
DOI:
10.1103/PhysRevLett.101.187003
PACS:
74.50.+r, 74.20.Rp, 74.70.Kn, 74.70.Pq
 
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