Irradiation-Induced Modification of the Superconducting Properties of Heavily-Boron-Doped Diamond

D. L. Creedon, Y. Jiang, K. Ganesan, A. Stacey, T. Kageura, H. Kawarada, J. C. McCallum, B. C. Johnson, S. Prawer, D. N. Jamieson

研究成果: Article査読

3 被引用数 (Scopus)

抄録

Diamond, a wide band-gap semiconductor, can be engineered to exhibit superconductivity when doped heavily with boron. The phenomena has been demonstrated in samples grown by chemical vapor deposition where the boron concentration exceeds the critical concentration for the metal-to-insulator transition of nMIT4×1020/cm3. While the threshold carrier concentration for superconductivity is generally well established in the literature, it is unclear how well correlated higher critical temperatures are with increased boron concentration. Previous studies have generally compared several samples grown under different plasma conditions, or on substrates having different crystallographic orientations, in order to vary the incorporation of boron into the lattice. Here, we present a study of a single sample with unchanging boron concentration, and instead modify the charge-carrier concentration by introducing compensating defects via high-energy ion irradiation. Superconductivity is completely suppressed when the number of defects is sufficient to compensate the hole concentration to below threshold. Furthermore, we show it is possible to recover the superconductivity by annealing the sample in vacuum to remove the compensating defects.

本文言語English
論文番号044016
ジャーナルPhysical Review Applied
10
4
DOI
出版ステータスPublished - 2018 10 5

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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