Tunneling Spectroscopy and Vortex Imaging in Boron-Doped Diamond

Details Tunneling Spectroscopy and Vortex Imaging in Boron-Doped Diamond Tunneling Spectroscopy and Vortex Imaging in Boron-Doped Diamond

2005-10-20

arxiv.org/abs/cond-mat/0510541v2

Phys. Rev. Lett. 96, 097006 (2006)

Physics

Condensed Matter

Superconductivity

4 pages, 4 figures, replaced with revised version

Scientific paper

10.1103/PhysRevLett.96.097006

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 $\Delta(0)/k_B T_c \simeq 1.74$. Vortex imaging at low magnetic field also reveals localized states inside the vortex core that are unexpected for such a dirty superconductor.

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