Tunneling Spectroscopy and Vortex Imaging in Boron-Doped Diamond
arXiv:cond-mat/0510541 · doi:10.1103/PhysRevLett.96.097006
Abstract
We present the first scanning tunneling spectroscopy study of single-crystalline boron doped diamond. The measurements were performed below 100 mK with a low temperature scanning tunneling microscope. The tunneling density of states displays a clear superconducting gap. The temperature evolution of the order parameter follows the weak coupling BCS law with . Vortex imaging at low magnetic field also reveals localized states inside the vortex core that are unexpected for such a dirty superconductor.
4 pages, 4 figures, replaced with revised version