Superconductivity in diamond thin films well above liquid helium temperature
Abstract
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.
- Publication:
-
Applied Physics Letters
- Pub Date:
- October 2004
- DOI:
- arXiv:
- arXiv:cond-mat/0406053
- Bibcode:
- 2004ApPhL..85.2851T
- Keywords:
-
- 81.05.Cy;
- 74.78.Db;
- 73.61.Cw;
- 74.25.Ha;
- 74.10.+v;
- 74.25.Fy;
- Elemental semiconductors;
- Low-T<sub>c</sub> films;
- Magnetic properties;
- Occurrence potential candidates;
- Transport properties;
- Condensed Matter - Superconductivity
- E-Print:
- 6 pages, 3 figures