Superconductivity in diamond thin films well above liquid helium temperature

By Y. Takano, M. Nagao, K. Kobayashi, Hitoshi Umezawa, I. Sakaguchi, M. Tachiki, T. Hatano, H. Kawarada. 2004

275 citations recorded by the source corpus.

We report unambiguous evidence for superconductivity in a heavily boron-doped diamond thin film grown by microwave plasma-assisted chemical vapor deposition (MPCVD). An advantage of the MPCVD-deposited diamond is that it can contain boron at high concentration, especially in (111)-oriented films. Superconducting transition temperatures are determined by transport measurements to be 7.4 K for TC onset and 4.2 K for zero resistance. The upper critical field is estimated to be 7 T. Magnetization as a function of magnetic fields shows typical type-II superconducting properties.

Subfields: Condensed Matter Physics, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/8c2ce6a7203fd8ae81cb9ac8fa4c72d640123eed