Quantum magnetotransport in monolayer $\mathrm{Pt_{2}HgSe_{3}}$

TL;DR

This paper develops a theoretical model to study quantum magnetotransport in monolayer jacutingaite, showing how external fields induce topological phase transitions and affect electronic transport properties, with implications for future quantum devices.

Contribution

It introduces a comprehensive theoretical framework for understanding and controlling magnetotransport and topological phases in monolayer jacutingaite under various external stimuli.

Findings

External electric and optical fields induce topological phase transitions.

Zeroth Landau level shows spin- and valley-polarized splitting.

Conductivities can be tuned by external fields.

Abstract

We present a theoretical framework to investigate quantum magnetotransport in monolayer jacutingaite, focusing on its response to external electric fields and off-resonant circularly polarized laser irradiation. Our analysis reveals a sequence of topological phase transitions triggered by tuning these external parameters. We find that the zeroth LL exhibits spin- and valley-polarized splitting, leading to four distinct peaks in the DOSs for the $K$ and $K'$ valleys. Using the Kubo formalism, we calculate both longitudinal and Hall magneto-optical conductivities based on the Kane-Mele model. Our results demonstrate that external electric, magnetic, and off-resonant optical fields can control these conductivities. These findings highlight monolayer jacutingaite as a highly tunable platform with strong potential for future applications in photonics, optoelectronics, and topological quantum devices.