A Raman scattering study of superconductivity in MgB2

James W. Quilty; Sergey Lee; Ayako Yamamoto; Setsuko Tajima; Akio Yamanaka

doi:10.1016/S0921-4534(02)02680-1

A Raman scattering study of superconductivity in MgB₂

James W. Quilty, Sergey Lee, Ayako Yamamoto, Setsuko Tajima, Akio Yamanaka

Research output: Contribution to journal › Conference article › peer-review

7 Citations (Scopus)

Abstract

Measurements of the in-plane and out-of-plane electronic Raman continuum in MgB₂ single crystals show markedly different behaviour below T_c, indicative of a complex gap structure. In xx and xy polarisation configurations, a sharp pair-breaking peak is seen near 100 cm^-1 but no scattering threshold forms directly below the peak. In zz and zx polarisations, a threshold is seen at 30 cm^-1 but no pair-breaking peak appears. This behaviour can be understood in terms of band-dependent impurity scattering effects on two separate gaps.

Original language	English
Pages (from-to)	131-132
Number of pages	2
Journal	Physica C: Superconductivity and its applications
Volume	388-389
DOIs	https://doi.org/10.1016/S0921-4534(02)02680-1
Publication status	Published - 2003 May
Externally published	Yes
Event	proceedings of the 23rd international conference on low temper - Hiroshima, Japan Duration: 2002 Aug 20 → 2002 Aug 27

Keywords

MgB
Raman spectroscopy
Superconducting gap

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

Access to Document

10.1016/S0921-4534(02)02680-1

Cite this

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title = "A Raman scattering study of superconductivity in MgB2",

abstract = "Measurements of the in-plane and out-of-plane electronic Raman continuum in MgB2 single crystals show markedly different behaviour below Tc, indicative of a complex gap structure. In xx and xy polarisation configurations, a sharp pair-breaking peak is seen near 100 cm-1 but no scattering threshold forms directly below the peak. In zz and zx polarisations, a threshold is seen at 30 cm-1 but no pair-breaking peak appears. This behaviour can be understood in terms of band-dependent impurity scattering effects on two separate gaps.",

keywords = "MgB, Raman spectroscopy, Superconducting gap",

author = "Quilty, {James W.} and Sergey Lee and Ayako Yamamoto and Setsuko Tajima and Akio Yamanaka",

note = "Funding Information: This work was supported by the New Energy and Industrial Technology Development Organization (NEDO) as collaborative research and development of fundamental technologies for superconductivity applications.; proceedings of the 23rd international conference on low temper ; Conference date: 20-08-2002 Through 27-08-2002",

year = "2003",

month = may,

doi = "10.1016/S0921-4534(02)02680-1",

language = "English",

volume = "388-389",

pages = "131--132",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

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TY - JOUR

T1 - A Raman scattering study of superconductivity in MgB2

AU - Quilty, James W.

AU - Lee, Sergey

AU - Yamamoto, Ayako

AU - Tajima, Setsuko

AU - Yamanaka, Akio

N1 - Funding Information: This work was supported by the New Energy and Industrial Technology Development Organization (NEDO) as collaborative research and development of fundamental technologies for superconductivity applications.

PY - 2003/5

Y1 - 2003/5

N2 - Measurements of the in-plane and out-of-plane electronic Raman continuum in MgB2 single crystals show markedly different behaviour below Tc, indicative of a complex gap structure. In xx and xy polarisation configurations, a sharp pair-breaking peak is seen near 100 cm-1 but no scattering threshold forms directly below the peak. In zz and zx polarisations, a threshold is seen at 30 cm-1 but no pair-breaking peak appears. This behaviour can be understood in terms of band-dependent impurity scattering effects on two separate gaps.

AB - Measurements of the in-plane and out-of-plane electronic Raman continuum in MgB2 single crystals show markedly different behaviour below Tc, indicative of a complex gap structure. In xx and xy polarisation configurations, a sharp pair-breaking peak is seen near 100 cm-1 but no scattering threshold forms directly below the peak. In zz and zx polarisations, a threshold is seen at 30 cm-1 but no pair-breaking peak appears. This behaviour can be understood in terms of band-dependent impurity scattering effects on two separate gaps.

KW - MgB

KW - Raman spectroscopy

KW - Superconducting gap

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U2 - 10.1016/S0921-4534(02)02680-1

DO - 10.1016/S0921-4534(02)02680-1

M3 - Conference article

AN - SCOPUS:0038188608

VL - 388-389

SP - 131

EP - 132

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

SN - 0921-4534

T2 - proceedings of the 23rd international conference on low temper

Y2 - 20 August 2002 through 27 August 2002

ER -