Programme

P.80 -- Posters, VCTP-50

Date: Thursday, 7 August 2025

Time: 08:30 - 10:00

Effect of polarized light and magnetic field on the transport properties of germanene

Do Muoi

Faculty of Natural Sciences, Pham Van Dong University, Quang Ngai, VietNam

We present a theoretical study of quantum transport in germanene, a topological insulator under the influence of a perpendicular magnetic field and circularly polarized light. The interplay between the magnetic field and polarized light modulates the resulting band structure, while the topological characteristics are governed by low-energy surface state dynamics. Our results reveal the emergence of a novel quantum Hall state, in which the zeroth Landau level undergoes a quantum phase transition from a trivial insulating state with zero Hall conductivity at the charge neutrality point to a Hall insulating state characterized by a quantized Hall conductivity of e^2/h. These findings highlight the promise of germanene in next generation spintronic devices and open new experimental avenues for the exploration of unconventional quantum Hall states.

Presenter: Do Muoi