Phys. Rev. Lett. 90, 177002 (2003) [4 pages]Mixed State of a Dirty Two-Band Superconductor: Application to MgB2Received 25 October 2002; published 29 April 2003 We investigate the vortex state in a two-band superconductor with strong intraband and weak interband electronic scattering rates. Coupled Usadel equations are solved numerically, and the distributions of the pair potentials and local densities of states are calculated for two bands at different values of magnetic fields. The existence of two distinct length scales corresponding to different bands is demonstrated. The results provide qualitative interpretation of recent scanning tunneling microscopy experiments on vortex structure imaging in MgB2. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.90.177002
DOI:
10.1103/PhysRevLett.90.177002
PACS:
74.25.Ha, 74.20.De, 74.25.Op
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