MAGNETIC-FIELD DEPENDENCE OF THE DENSITY-OF-STATES FOR THIN-FILMS OF D-WAVE SUPERCONDUCTORS

The density of states (DOS) produced by the vortices in thin films of superconductors with the anisotropic pairing is studied in the low tem perature limit using the semiclassical approach: For ultrathin films o f thickness d much less than lambda (where lambda is the London penetr ation depth) the magnetic field dependence of the spatially averaged D OS N(B) at the Fermi level appears to be qualitatively different from the one calculated previously for bulk superconductors in Ref.[1]. The N(B) behavior is shown to depend essentially on the ratio of the inte rvortex distance to the effective penetration depth lambda(eff) = lamb da(2)/d. The peculiarities of DOS produced by 2D pancake vortices (far away from the normal cores) in d-wave layered superconductors are als o discussed.