Collective modes in anisotropic double layer systems

TL;DR

This paper investigates the behavior of collective plasmonic modes in anisotropic double layer systems, deriving a zero-temperature polarization function and analyzing how these modes depend on orientation, doping, and anisotropy.

Contribution

It introduces a new zero-temperature polarization function for anisotropic conductors with paraboloidal dispersion and explores its impact on plasmonic modes in double layer systems.

Findings

Plasmonic modes depend on relative orientation and doping.

Anisotropy significantly influences collective excitations.

Derived polarization function enables analysis of anisotropic systems.

Abstract

We study collective modes in anisotropic double layer systems. To this end, we derive a zero-$T$ dynamic polarization function for a conductor with a paraboloidal dispersion. Following this, we demonstrate the dependence of the plasmonic modes on the relative orientation, doping, and system anisotropy.