Observation of Leggett's collective mode in a multiband MgB2 superconductor

被引：116

作者：

Blumberg, G.

Mialitsin, A.

Dennis, B. S.

Klein, M. V.

Zhigadlo, N. D.

Karpinski, J.

机构：

[1] Alcatel Lucent, Bell Labs, Murray Hill, NJ 07974 USA

[2] Univ Illinois, Dept Phys, Urbana, IL 61801 USA

[3] Univ Illinois, Mat Res Lab, Urbana, IL 61801 USA

[4] ETH, Solid State Phys Lab, CH-8093 Zurich, Switzerland

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 22期

关键词：

D O I：

10.1103/PhysRevLett.99.227002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report observation of Leggett's collective mode in a multiband MgB2 superconductor with T-c=39 K arising from the fluctuations in the relative phase between two superconducting condensates. The novel mode is observed by Raman spectroscopy at 9.4 meV in the fully symmetric scattering channel. The observed mode frequency is consistent with theoretical considerations based on first-principles computations.

引用

页数：4

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