Raman Scattering from a Superconductivity-Induced Bound State in MgB2
R. Zeyher
DOI 10.1103/PhysRevLett.90.107002 · Physical Review Letters
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Abstract
It is shown that the sharp peak in the E2g Raman spectrum of superconducting MgB2 is due to a bound state caused by the electron-phonon coupling. Our theory explains why this peak appears only in the spectra with E2g symmetry and only in the σ but not the π bands. The properties of the bound state and the Raman spectrum are investigated, also in the presence of impurity scattering.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| MgB2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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