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

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

2001-06-08

arxiv.org/abs/cond-mat/0106147v1

Physics

Condensed Matter

Superconductivity

8 pages, 5 figures

Scientific paper

Phonon 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.

Affiliated with

Also associated with

No associations

Rating

Micro-Raman scattering investigation of MgB2 and RB2 (R=Al, Mn, Nb and Ti) does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Micro-Raman scattering investigation of MgB2 and RB2 (R=Al, Mn, Nb and Ti), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Micro-Raman scattering investigation of MgB2 and RB2 (R=Al, Mn, Nb and Ti) will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-419107