Acoustic Plasmons in MgB2

Details Acoustic Plasmons in MgB2 Acoustic Plasmons in MgB2

2001-03-05

arxiv.org/abs/cond-mat/0103082v1

Physics

Condensed Matter

Superconductivity

To be presented at the APS March meeting post deadline session on MgB2 Monday, March 12, 2001 in Seattle

Scientific paper

We present strong evidence for the existence of an acoustic plasmon mode,
that is, a quadrupolar charge collective mode with linear dispersion, in MgB2.
This mode may be responsible for the anomalously small value of the Coulomb
pseudopotential required to explain the high superconducting transition
temperature of 40K.

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