Observation of a superconducting gap in boron-doped diamond by laser-excited photoemission spectroscopy

K. Ishizaka; R. Eguchi; S. Tsuda; T. Yokoya; A. Chainani; T. Kiss; T. Shimojima; T. Togashi; S. Watanabe; C. T. Chen; C. Q. Zhang; Y. Takano; M. Nagao; I. Sakaguchi; T. Takenouchi; H. Kawarada; S. Shin

doi:10.1103/PhysRevLett.98.047003

Observation of a superconducting gap in boron-doped diamond by laser-excited photoemission spectroscopy

K. Ishizaka, R. Eguchi, S. Tsuda, T. Yokoya, A. Chainani, T. Kiss, T. Shimojima, T. Togashi, S. Watanabe, C. T. Chen, C. Q. Zhang, Y. Takano, M. Nagao, I. Sakaguchi, T. Takenouchi, H. Kawarada, S. Shin

研究成果 › 査読

43 被引用数 (Scopus)

抄録

We investigate the temperature (T)-dependent low-energy electronic structure of a boron-doped diamond thin film using ultrahigh resolution laser-excited photoemission spectroscopy. We observe a clear shift of the leading edge below T=11K, indicative of a superconducting gap opening (Δ∼0.78meV at T=4.5K). The gap feature is significantly broad and a well-defined quasiparticle peak is lacking even at the lowest temperature of measurement (=4.5K). We discuss our results in terms of disorder effects on the normal state transport and superconductivity in this system.

本文言語	English
論文番号	047003
ジャーナル	Physical Review Letters
巻	98
号	4
DOI	https://doi.org/10.1103/PhysRevLett.98.047003
出版ステータス	Published - 2007

ASJC Scopus subject areas

物理学および天文学（全般）

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10.1103/PhysRevLett.98.047003

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Ishizaka, K., Eguchi, R., Tsuda, S., Yokoya, T., Chainani, A., Kiss, T., Shimojima, T., Togashi, T., Watanabe, S., Chen, C. T., Zhang, C. Q., Takano, Y., Nagao, M., Sakaguchi, I., Takenouchi, T., Kawarada, H., & Shin, S. (2007). Observation of a superconducting gap in boron-doped diamond by laser-excited photoemission spectroscopy. Physical Review Letters, 98(4), [047003]. https://doi.org/10.1103/PhysRevLett.98.047003

Ishizaka, K, Eguchi, R, Tsuda, S, Yokoya, T, Chainani, A, Kiss, T, Shimojima, T, Togashi, T, Watanabe, S, Chen, CT, Zhang, CQ, Takano, Y, Nagao, M, Sakaguchi, I, Takenouchi, T, Kawarada, H & Shin, S 2007, 'Observation of a superconducting gap in boron-doped diamond by laser-excited photoemission spectroscopy', Physical Review Letters, vol. 98, no. 4, 047003. https://doi.org/10.1103/PhysRevLett.98.047003

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abstract = "We investigate the temperature (T)-dependent low-energy electronic structure of a boron-doped diamond thin film using ultrahigh resolution laser-excited photoemission spectroscopy. We observe a clear shift of the leading edge below T=11K, indicative of a superconducting gap opening (Δ∼0.78meV at T=4.5K). The gap feature is significantly broad and a well-defined quasiparticle peak is lacking even at the lowest temperature of measurement (=4.5K). We discuss our results in terms of disorder effects on the normal state transport and superconductivity in this system.",

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AU - Ishizaka, K.

AU - Eguchi, R.

AU - Tsuda, S.

AU - Yokoya, T.

AU - Chainani, A.

AU - Kiss, T.

AU - Shimojima, T.

AU - Togashi, T.

AU - Watanabe, S.

AU - Chen, C. T.

AU - Zhang, C. Q.

AU - Takano, Y.

AU - Nagao, M.

AU - Sakaguchi, I.

AU - Takenouchi, T.

AU - Kawarada, H.

AU - Shin, S.

PY - 2007

Y1 - 2007

N2 - We investigate the temperature (T)-dependent low-energy electronic structure of a boron-doped diamond thin film using ultrahigh resolution laser-excited photoemission spectroscopy. We observe a clear shift of the leading edge below T=11K, indicative of a superconducting gap opening (Δ∼0.78meV at T=4.5K). The gap feature is significantly broad and a well-defined quasiparticle peak is lacking even at the lowest temperature of measurement (=4.5K). We discuss our results in terms of disorder effects on the normal state transport and superconductivity in this system.

AB - We investigate the temperature (T)-dependent low-energy electronic structure of a boron-doped diamond thin film using ultrahigh resolution laser-excited photoemission spectroscopy. We observe a clear shift of the leading edge below T=11K, indicative of a superconducting gap opening (Δ∼0.78meV at T=4.5K). The gap feature is significantly broad and a well-defined quasiparticle peak is lacking even at the lowest temperature of measurement (=4.5K). We discuss our results in terms of disorder effects on the normal state transport and superconductivity in this system.

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Observation of a superconducting gap in boron-doped diamond by laser-excited photoemission spectroscopy

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