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.
I n that case, m∗ e should be replaced with the effective mass of a hole m∗ h, which can be negative according to the band theory of solids
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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.