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

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

We report observation of Leggett's collective mode in a multiband MgB2 superconductor with Tc=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....

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Veröffentlicht in:Physical review letters 2007-11, Vol.99 (22), p.227002-227002
Hauptverfasser: Blumberg, G, Mialitsin, A, Dennis, B S, Klein, M V, Zhigadlo, N D, Karpinski, J
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Sprache:eng
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Zusammenfassung:We report observation of Leggett's collective mode in a multiband MgB2 superconductor with Tc=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.
ISSN:0031-9007
DOI:10.1103/PhysRevLett.99.227002