Neutron inelastic scattering measurements have been performed on superconducting MgB2 above and below T,. The temperature dependence of the generalized phonon density-of-states showed clear anomalous behaviour near 24 meV in the acoustic phonon region, which may be interpreted as evidence of a substantial contribution to the total electron-phonon coupling strength deriving from these phonons. Weaker evidence for a corresponding response in the high-energy B bond stretching phonons was also encountered.
Vibrational spectroscopy of superconducting MgB2 by neutron inelastic scattering
Colognesi D;
2001
Abstract
Neutron inelastic scattering measurements have been performed on superconducting MgB2 above and below T,. The temperature dependence of the generalized phonon density-of-states showed clear anomalous behaviour near 24 meV in the acoustic phonon region, which may be interpreted as evidence of a substantial contribution to the total electron-phonon coupling strength deriving from these phonons. Weaker evidence for a corresponding response in the high-energy B bond stretching phonons was also encountered.File in questo prodotto:
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