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Type-1.5 Superconducting State from an Intrinsic Proximity Effect in Two-Band Superconductors

Source: Phys. Rev. Lett. 105, 067003 (2010); doi:10.1103/PhysRevLett.105.067003

Published 5 August 2010

PACS
  • 74.25.Ha
    Magnetic properties of superconductors
  • 74.20.De
    Phenomenological theories of superconductivity
  • 74.25.Op
    Mixed state, critical fields, and surface sheath
  • YEAR: 2010
PUBLICATION DATA
Publisher:
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Egor Babaev,1,2 Johan Carlström,1 and Martin Speight3
1Department of Theoretical Physics, The Royal Institute of Technology, Stockholm, SE-10691 Sweden
2Department of Physics, University of Massachusetts, Amherst, Massachusetts 01003, USA
3School of Mathematics, University of Leeds, Leeds LS2 9JT, United Kingdom
We show that in multiband superconductors, even an extremely small interband proximity effect can lead to a qualitative change in the interaction potential between superconducting vortices by producing long-range intervortex attraction. This type of vortex interaction results in an unusual response to low magnetic fields leading to phase separation into domains of two-component Meissner states and vortex droplets.
History: Received 12 October 2009; revised 7 May 2010; published 5 August 2010
Permalink: http://link.aps.org/abstract/PRL/v105/e067003
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