Superconductivity in Polycrystalline Diamond Thin Films

Details Superconductivity in Polycrystalline Diamond Thin Films Superconductivity in Polycrystalline Diamond Thin Films

2005-07-20

arxiv.org/abs/cond-mat/0507476v2

Diamond & Related Materials 14 (2005) 1936 -- 1938

Physics

Condensed Matter

Superconductivity

6 pages, 6 figures

Scientific paper

Superconductivity was discovered in heavily boron-doped diamond thin films deposited by the microwave plasma assisted chemical vapor deposition (MPCVD) method. Advantages of the MPCVD deposited diamond are the controllability of boron concentration in a wide range, and a high boron concentration, especially in (111) oriented films, compared to that of the high-pressure high-temperature method. The superconducting transition temperatures are determined to be 8.7K for Tc onset and 5.0K for zero resistance by transport measurements. And the upper critical field is estimated to be around 7T.

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