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STM/STS study of superconducting diamond

Author(s): Alexey Troyanovskiy, Terukazu Nishizaki and Evgeniy Ekimov

Journal: Science and Technology of Advanced Materials
ISSN 1468-6996

Volume: 7;
Issue: S1;
Start page: S27;
Date: 2006;
Original page

We present a scanning tunneling microscopy/spectroscopy (STM/STS) study of synthetic polycrystalline boron-doped diamond in the temperature range 0.5–4.3 K. At 4.3 K the sample-surface was very non-uniform and tunneling I(V) spectra were typical for p-type semiconductors. After cooling below the superconducting transition temperature, we detected and measured the superconducting gap of diamonds. At temperatures around 0.5 K the energy gap was around 0.8 and 1 mV (for two different samples).
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