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Superconductivity in Polycrystalline Diamond Thin Films

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arxiv cond-mat/0507476 v2 pith:BWC52JLM submitted 2005-07-20 cond-mat.supr-con

Yoshihiko Takano , Masanori Nagao , Tomohiro Takenouchi , Hitoshi Umezawa , Isao Sakaguchi , Masashi Tachiki , Hiroshi Kawarada This is my paper · ORCID
classification cond-mat.supr-con
keywords diamondfilmsboronconcentrationdepositedmethodmpcvdsuperconductivity
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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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