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

K. Ishizaka, Ritsuko Eguchi, S. Tsuda, Takayoshi 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

Research output: Contribution to journalArticle

36 Citations (Scopus)

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.

Original languageEnglish
Article number047003
JournalPhysical Review Letters
Volume98
Issue number4
DOIs
Publication statusPublished - 2007

Fingerprint

boron
photoelectric emission
diamonds
leading edges
spectroscopy
lasers
superconductivity
disorders
electronic structure
shift
thin films
temperature
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Observation of a superconducting gap in boron-doped diamond by laser-excited photoemission spectroscopy. / Ishizaka, K.; Eguchi, Ritsuko; Tsuda, S.; Yokoya, Takayoshi; 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.

In: Physical Review Letters, Vol. 98, No. 4, 047003, 2007.

Research output: Contribution to journalArticle

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
Ishizaka, K. ; Eguchi, Ritsuko ; Tsuda, S. ; Yokoya, Takayoshi ; 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. / Observation of a superconducting gap in boron-doped diamond by laser-excited photoemission spectroscopy. In: Physical Review Letters. 2007 ; Vol. 98, No. 4.
@article{02c882d53be04cceaa7bd1cf2a1b8a62,
title = "Observation of a superconducting gap in boron-doped diamond by laser-excited photoemission spectroscopy",
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.",
author = "K. Ishizaka and Ritsuko Eguchi and S. Tsuda and Takayoshi Yokoya and A. Chainani and T. Kiss and T. Shimojima and T. Togashi and S. Watanabe and Chen, {C. T.} and Zhang, {C. Q.} and Y. Takano and M. Nagao and I. Sakaguchi and T. Takenouchi and H. Kawarada and S. Shin",
year = "2007",
doi = "10.1103/PhysRevLett.98.047003",
language = "English",
volume = "98",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "4",

}

TY - JOUR

T1 - Observation of a superconducting gap in boron-doped diamond by laser-excited photoemission spectroscopy

AU - Ishizaka, K.

AU - Eguchi, Ritsuko

AU - Tsuda, S.

AU - Yokoya, Takayoshi

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.

UR - http://www.scopus.com/inward/record.url?scp=33846527942&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33846527942&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.98.047003

DO - 10.1103/PhysRevLett.98.047003

M3 - Article

AN - SCOPUS:33846527942

VL - 98

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 4

M1 - 047003

ER -