Analytical derivation shows criticality with specific exponents in attenuation constant, group velocity, and dielectric response of high-density Drude metals near plasma frequency, plus a Drude-Sommerfeld quantum correction.
Sommerfeld, Zur Elektronentheorie der Metalle auf Grund der Fermischen Statistik , Z
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Criticality in optical properties of the Drude and Drude-Sommerfeld metals around the plasma frequencies for high carrier concentrations
Analytical derivation shows criticality with specific exponents in attenuation constant, group velocity, and dielectric response of high-density Drude metals near plasma frequency, plus a Drude-Sommerfeld quantum correction.