Electronic correlations in the Casimir effect
Instituto de Fisica, Universidad Nacional Autónoma de México - Mexico DF 04510, Mexico
Received: 1 May 2015
Accepted: 13 July 2015
We present a theoretical study of the Casimir interaction between heavy Fermi metals that show strong electronic correlations below a critical temperature Tc. Unlike noble metals like Au, these correlations lower the plasma frequency and damping rate due to an increase in the electronic effective mass. Furthermore, the effective mass and damping are frequency dependent and related by causal relations, thus a zero damping or plasma-like description in the dielectric function of these materials is not possible. In this work we consider the heavy metals UPd2Al3 and UNi2Al3 and the compound CePd3, whose dielectric properties are constructed from available experimental data. In all cases, the magnitude of the Casimir force is measurable using current experimental devices.
PACS: 03.70.+k – Theory of quantized fields / 12.20.-m – Quantum electrodynamics / 78.20.Ci – Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity)
© EPLA, 2015