Micro-Raman scattering investigation of MgB2 and RB2 (R=Al, Mn, Nb and Ti)

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dc.creatorOgita, N.
dc.creatorKariya, T.
dc.creatorHiraoka, K.
dc.creatorNagamatsu, J.
dc.creatorMuranaka, T.
dc.creatorTakagiwa, H.
dc.creatorAkimitsu, J.
dc.creatorUdagawa, M.
dc.date2001-06-08
dc.date.accessioned2026-07-07T02:41:41Z
dc.date.available2026-07-07T02:41:41Z
dc.descriptionPhonon spectra have been investigated by micro-Raman scattering from 290 to 20K. New peaks at 500 and 674 cm-1 appear below 250K in MgB2. These peaks are explained by the Fermi resonance, where Raman-active E2g intereacts with the overtone of E1u due to anhamonicity. Raman spectra of the isostructural RB2 (R=Al, Mn, Nb and Ti) have been also measured at 290K. The line width of E2g phonon of the superconductor MgB2 and NbB2 shows the broader than that of the non-superconductors. It is found that the anharmonicity of phonons is important for the superconductivity for MgB2.
dc.description8 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0106147
dc.identifierhttp://arxiv.org/abs/cond-mat/0106147
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/17840
dc.subjectSuperconductivity
dc.titleMicro-Raman scattering investigation of MgB2 and RB2 (R=Al, Mn, Nb and Ti)
dc.typetext

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