Acoustic Plasmons in MgB2
classification
❄️ cond-mat.supr-con
cond-mat.str-el
keywords
modeacousticmgb2anomalouslychargecollectivecoulombdispersion
read the original abstract
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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