Inhomogeneous states of nonequilibrium superconductors: Quasiparticle bags and antiphase domain walls

Phys. Rev. B 57, 14433 – Published 1 June 1998
M. I. Salkola and J. R. Schrieffer


Nonequilibrium properties of short-coherence-length s-wave superconductors are analyzed in the presence of extrinsic and intrinsic inhomogeneities. In general, the lowest-energy configurations of quasiparticle excitations are topological textures into which quasiparticles segregate and that are described as antiphase domain walls between superconducting regions whose order parameter phases differ by π. Antiphase domain walls can be probed by various experimental techniques, for example, by optical absorption and NMR. At zero temperature, quasiparticles seldom appear as self-trapped bag states. However, for low concentrations of quasiparticles, they may be stabilized in superconductors by extrinsic defects.


  • Received 19 December 1997
  • Published in the issue dated 1 June 1998

© 1998 The American Physical Society

Authors & Affiliations

M. I. Salkola and J. R. Schrieffer

  • NHMFL and Department of Physics, Florida State University, Tallahassee, Florida 32310

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