Gradient expansion for the free energy of a clean superconductor

Apr 1, 1999
12 pages
Published in:
  • Phys.Rev.B 59 (1999) 9545-9557
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Abstract: (APS)
We describe a method for obtaining the gradient expansion for the free energy of a clean BCS superconductor. We present explicit results up to fourth order in the gradients of the order parameter.
Note:
  • 33 pages, LateX
  • 74.20.Fg
  • 74.80.-g