Bulk contributions to the Casimir interaction of Dirac materials
M. Bordag, I. Fialkovsky, N. Khusnutdinov, and D. Vassilevich
TL;DR
This paper calculates the bulk dielectric properties of gapped Dirac materials using Quantum Field Theory and analyzes their impact on Casimir forces, providing insights into material-specific quantum interactions.
Contribution
It introduces a detailed quantum field theoretical approach to compute dielectric functions of Dirac materials with various parameters, advancing understanding of their Casimir interactions.
Findings
Dielectric functions depend on mass gap, chemical potential, and temperature.
Casimir pressure is significantly influenced by the dielectric properties.
Bulk effects dominate when boundary effects are neglected.
Abstract
Exploiting methods of Quantum Field Theory we compute the bulk polarization tensor and bulk dielectric functions for Dirac materials in the presence of a mass gap, chemical potential, and finite temperature. Using these results (and neglecting eventual boundary effects), we study the Casimir interaction of Dirac materials. We describe in detail the characteristic features of the dielectric functions and their influence on the Casimir pressure.
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