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arxiv: cond-mat/0510541 · v2 · submitted 2005-10-20 · ❄️ cond-mat.supr-con

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Tunneling Spectroscopy and Vortex Imaging in Boron-Doped Diamond

B. Sacepe , C. Chapelier , C. Marcenat , J. Kacmarcik , T. Klein , M. Bernard , E. Bustarret
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classification ❄️ cond-mat.supr-con
keywords tunnelingvortexdiamondimagingscanningspectroscopystatestemperature
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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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