Tunneling density of states in d-wave superconductors with rough surfaces
M. Palumbo, L. J. Buchholtz, D. Rainer and J. A. Sauls
- Date: February 1996
Czech J Phys (1996) 46: 1065-1066
We discuss the novel surface states which may occur near a boundary in a d-wave
superconductor and how these states are affected by surface diffusivity. The surface
roughness is taken into account via the ``Randomly Rippled Wall Model'', and all
calculations are performed within the quasiclassical theory of superconductivity. We
consider a uniaxial system with abulk order parameter of
dx2 - y2 symmetry. Our analysis
focuses on the emergence of surface states of a symmetry other than that of the stable
bulk phase when more than one attractive symmetry channel is present. The conditions
for the stability of the various surface states and their impact on the tunneling
characteristics are discussed.
Proceedings of the 21st International Conference on Low Temperature Physics,
Prague, August 8-14, 1996; 2 pages with 2 figures.