Local superconducting density of states of ErNi2B2C
arXiv:cond-mat/0509339 · doi:10.1103/PhysRevLett.96.027003
Abstract
We present local tunnelling microscopy and spectroscopy measurements at low temperatures in single crystalline samples of the magnetic superconductor ErNi2B2C. The electronic local density of states shows a striking departure from s-wave BCS theory with a finite value at the Fermi level, which amounts to half of the normal phase density of states.
9 pages, 3 figures