Signature of high T c above 25 K in high quality superconducting diamond

Hiroyuki Okazaki; Takanori Wakita; Takayuki Muro; Tetsuya Nakamura; Yuji Muraoka; Takayoshi Yokoya; Shin Ichiro Kurihara; Hiroshi Kawarada; Tamio Oguchi; Yoshihiko Takano

doi:10.1063/1.4907411

Signature of high T _c above 25 K in high quality superconducting diamond

Hiroyuki Okazaki, Takanori Wakita, Takayuki Muro, Tetsuya Nakamura, Yuji Muraoka, Takayoshi Yokoya, Shin Ichiro Kurihara, Hiroshi Kawarada, Tamio Oguchi, Yoshihiko Takano

基幹理工学部

研究成果: Article › 査読

53 被引用数 (Scopus)

抄録

We have observed zero resistivity above 10 K and an onset of resistivity reduction at 25.2 K in a heavily B-doped diamond film. However, the effective carrier concentration is similar to that of superconducting diamond with a lower T_c. We found that the carrier has a longer mean free path and lifetime than in the previous report, indicating that this highest T_c diamond has better crystallinity compared to that of other superconducting diamond films. In addition, the susceptibility shows a small transition above 20 K in the high quality diamond, suggesting a signature of superconductivity above 20 K. These results strongly suggest that heavier carrier doped defect-free crystalline diamond could give rise to high T_c diamond.

本文言語	English
論文番号	052601
ジャーナル	Applied Physics Letters
巻	106
号	5
DOI	https://doi.org/10.1063/1.4907411
出版ステータス	Published - 2015 2月 2

ASJC Scopus subject areas

物理学および天文学（その他）

文献へのアクセス

10.1063/1.4907411

他のファイルとリンク

引用スタイル

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abstract = "We have observed zero resistivity above 10 K and an onset of resistivity reduction at 25.2 K in a heavily B-doped diamond film. However, the effective carrier concentration is similar to that of superconducting diamond with a lower Tc. We found that the carrier has a longer mean free path and lifetime than in the previous report, indicating that this highest Tc diamond has better crystallinity compared to that of other superconducting diamond films. In addition, the susceptibility shows a small transition above 20 K in the high quality diamond, suggesting a signature of superconductivity above 20 K. These results strongly suggest that heavier carrier doped defect-free crystalline diamond could give rise to high Tc diamond.",

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AU - Okazaki, Hiroyuki

AU - Wakita, Takanori

AU - Muro, Takayuki

AU - Nakamura, Tetsuya

AU - Muraoka, Yuji

AU - Yokoya, Takayoshi

AU - Kurihara, Shin Ichiro

AU - Kawarada, Hiroshi

AU - Oguchi, Tamio

AU - Takano, Yoshihiko

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