Drude weight and superconducting weight

Journal of Physics. Condensed Matter : an Institute of Physics Journal
R Resta

Abstract

The Drude weight D (also called charge stiffness) measures the effective electron density contributing to dc conductivity; it vanishes in insulators. It is a general concept, which applies to any metal, including cases with disorder and electron-electron interaction. We provide a thorough analysis of D and of its meaning, both in the general case and in the special case of band metals, where we also show that D has a close relationship to orbital magnetization. The superconducting weight D s measures instead the superfluid density accounting for the Meissner effect. The two quantities D and D s are the main criteria to discriminate between insulators, metals, and superconductors.

References

Nov 2, 1984·JAMA : the Journal of the American Medical Association·R L Landau, J M Gustafson
Apr 1, 1993·Physical Review. B, Condensed Matter·D J ScalapinoS Zhang
Oct 4, 2005·Physical Review Letters·Di XiaoQian Niu
Oct 4, 2005·Physical Review Letters·T ThonhauserR Resta
Apr 2, 2017·American Journal of Physiology. Heart and Circulatory Physiology·Bojun ZhangThomas C Resta

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Citations

Oct 11, 2019·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Fabio BernardiniAntonio Sanna

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