Superconductivity in diamond
E. A. Ekimov, V. A. Sidorov, E. D. Bauer, N. N. Mel'nik, N. J. Curro,, J. D. Thompson, and S. M. Stishov
TL;DR
This paper reports the discovery of superconductivity in boron-doped diamond synthesized under high pressure and temperature, establishing it as a bulk, type-II superconductor with potential implications for other diamond-structured materials.
Contribution
It is the first demonstration of superconductivity in boron-doped diamond, revealing new possibilities for diamond-structured materials to exhibit superconductivity.
Findings
Superconductivity observed below Tc=4 K
Superconductivity persists up to Hc2(0)=3.5 T
Boron-doped diamond is a bulk, type-II superconductor
Abstract
We report the discovery of superconductivity in boron-doped diamond synthesized at high pressure (8-9 GPa) and temperature (2,500-2,800 K). Electrical resistivity, magnetic susceptibility, specific heat, and field-dependent resistance measurements show that boron-doped diamond is a bulk, type-II superconductor below the superconducting transition temperature Tc=4 K; superconductivity survives in a magnetic field up to Hc2(0)=3.5 T. The discovery of superconductivity in diamond-structured carbon suggests that Si and Ge, which also form in the diamond structure, may similarly exhibit superconductivity under the appropriate conditions.
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