TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.16.3.077
TI  - Faraday rotation and transmittance as markers of topological phase transitions in 2D materials
PY  - 2024/03/18
UR  - https://scipost.org/SciPostPhys.16.3.077
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 16
IS  - 3
SP  - 077
A1  - Calixto, Manuel
AU  - Mayorgas, Alberto
AU  - Cordero, Nicolás A.
AU  - Romera, Elvira
AU  - Castaños Garza, Octavio Héctor
AB  - We analyze the magneto-optical conductivity (and related magnitudes like transmittance and Faraday rotation of the irradiated polarized light) of some elemental two-dimensional Dirac materials of group IV (graphene analogues, buckled honeycomb lattices, like silicene, germanene, stannane, etc.), group V (phosphorene), and zincblende heterostructures (like HgTe/CdTe quantum wells) near the Dirac and gamma points, under out-of-plane magnetic and electric fields, to characterize topological-band insulator phase transitions and their critical points. We provide plots of the Faraday angle and transmittance as a function of the polarized light frequency, for different external electric and magnetic fields, chemical potential, HgTe layer thickness and temperature, to tune the material magneto-optical properties. We have shown that absortance/transmittance acquires extremal values at the critical point, where the Faraday angle changes sign, thus providing fine markers of the topological phase transition. In the case of non-topological materials as phosphorene, a minimum of the transmittance is also observed due to the energy gap closing by an external electric field.
ER  -

@Article{10.21468/SciPostPhys.16.3.077,
	title={{Faraday rotation and transmittance as markers of topological phase transitions in 2D materials}},
	author={Manuel Calixto and Alberto Mayorgas and Nicolás A. Cordero and Elvira Romera and Octavio Héctor Castaños Garza},
	journal={SciPost Phys.},
	volume={16},
	pages={077},
	year={2024},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.16.3.077},
	url={https://scipost.org/10.21468/SciPostPhys.16.3.077},
}