Phonon softening in superconducting diamond

M. Hoesch; T. Fukuda; J. Mizuki; T. Takenouchi; H. Kawarada; J. P. Sutter; S. Tsutsui; A. Q.R. Baron; M. Nagao; Y. Takano

doi:10.1103/PhysRevB.75.140508

Phonon softening in superconducting diamond

M. Hoesch^*, T. Fukuda, J. Mizuki, T. Takenouchi, H. Kawarada, J. P. Sutter, S. Tsutsui, A. Q.R. Baron, M. Nagao, Y. Takano

^*この研究の対応する著者

基幹理工学部

研究成果: Article › 査読

34 被引用数 (Scopus)

抄録

We observe strong softening of optical-phonon modes in superconducting (Tc =4.2 K) boron-doped diamond near the Brillouin-zone center using inelastic x-ray scattering from a chemical vapor deposition grown highly oriented sample. The magnitude of the softening, and our observation that it becomes stronger approaching zone center, supports theoretical models suggesting a phonon-mediated pairing mechanism via coupling of optical-phonon modes to Fermi surfaces around the zone center. The electron-phonon coupling parameter is determined as approximately λ=0.33.

本文言語	English
論文番号	140508
ジャーナル	Physical Review B - Condensed Matter and Materials Physics
巻	75
号	14
DOI	https://doi.org/10.1103/PhysRevB.75.140508
出版ステータス	Published - 2007 4月 18

ASJC Scopus subject areas

電子材料、光学材料、および磁性材料
凝縮系物理学

文献へのアクセス

10.1103/PhysRevB.75.140508

他のファイルとリンク

引用スタイル

@article{084fe2c2e0dd4005b29127a85efab53b,

title = "Phonon softening in superconducting diamond",

abstract = "We observe strong softening of optical-phonon modes in superconducting (Tc =4.2 K) boron-doped diamond near the Brillouin-zone center using inelastic x-ray scattering from a chemical vapor deposition grown highly oriented sample. The magnitude of the softening, and our observation that it becomes stronger approaching zone center, supports theoretical models suggesting a phonon-mediated pairing mechanism via coupling of optical-phonon modes to Fermi surfaces around the zone center. The electron-phonon coupling parameter is determined as approximately λ=0.33.",

author = "M. Hoesch and T. Fukuda and J. Mizuki and T. Takenouchi and H. Kawarada and Sutter, {J. P.} and S. Tsutsui and Baron, {A. Q.R.} and M. Nagao and Y. Takano",

year = "2007",

month = apr,

day = "18",

doi = "10.1103/PhysRevB.75.140508",

language = "English",

volume = "75",

journal = "Physical Review B-Condensed Matter",

issn = "0163-1829",

publisher = "American Institute of Physics Publising LLC",

number = "14",

}

TY - JOUR

T1 - Phonon softening in superconducting diamond

AU - Hoesch, M.

AU - Fukuda, T.

AU - Mizuki, J.

AU - Takenouchi, T.

AU - Kawarada, H.

AU - Sutter, J. P.

AU - Tsutsui, S.

AU - Baron, A. Q.R.

AU - Nagao, M.

AU - Takano, Y.

PY - 2007/4/18

Y1 - 2007/4/18

N2 - We observe strong softening of optical-phonon modes in superconducting (Tc =4.2 K) boron-doped diamond near the Brillouin-zone center using inelastic x-ray scattering from a chemical vapor deposition grown highly oriented sample. The magnitude of the softening, and our observation that it becomes stronger approaching zone center, supports theoretical models suggesting a phonon-mediated pairing mechanism via coupling of optical-phonon modes to Fermi surfaces around the zone center. The electron-phonon coupling parameter is determined as approximately λ=0.33.

AB - We observe strong softening of optical-phonon modes in superconducting (Tc =4.2 K) boron-doped diamond near the Brillouin-zone center using inelastic x-ray scattering from a chemical vapor deposition grown highly oriented sample. The magnitude of the softening, and our observation that it becomes stronger approaching zone center, supports theoretical models suggesting a phonon-mediated pairing mechanism via coupling of optical-phonon modes to Fermi surfaces around the zone center. The electron-phonon coupling parameter is determined as approximately λ=0.33.

UR - http://www.scopus.com/inward/record.url?scp=34247337670&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34247337670&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.75.140508

DO - 10.1103/PhysRevB.75.140508

M3 - Article

AN - SCOPUS:34247337670

SN - 0163-1829

VL - 75

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

IS - 14

M1 - 140508

ER -

Phonon softening in superconducting diamond

抄録

ASJC Scopus subject areas

文献へのアクセス

他のファイルとリンク

フィンガープリント

引用スタイル