Optical properties, plasmons, and orbital Skyrme textures in twisted TMDs

TL;DR

This paper demonstrates that bulk plasmons in twisted TMDs can reveal real-space topological textures, specifically orbital Skyrme textures, through detailed optical and plasmon spectrum analysis.

Contribution

It introduces the concept that bulk plasmons serve as probes of real-space topology in twisted TMDs, with detailed calculations for orbital Skyrme textures in MoTe2.

Findings

Bulk plasmons can detect real-space topological textures.

Optical conductivity and plasmon spectra are calculated for twisted MoTe2.

Orbital Skyrme textures influence plasmon behavior.

Abstract

In the long-wavelength limit, Bloch-band Berry curvature has no effect on the bulk plasmons of a two-dimensional electron system. In this Letter we show instead that bulk plasmons are a probe of real-space topology. In particular, we focus on orbital Skyrme textures in twisted transition metal dichalcogenides, presenting detailed semiclassical and quantum mechanical calculations of the optical conductivity and plasmon spectrum of twisted ${\rm MoTe}_2$.