2026-06-29T22:50:52Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/88542024-03-21T01:05:21Zcom_10259.4_2527com_10259_5086com_10259_2604col_10259.4_2528

Calixto, Manuel Mayorgas, Alberto Cordero Tejedor, Nicolás A. Romera, Elvira Castaños Garza, Octavio Héctor 2024-03-20T09:28:16Z 2024-03-20T09:28:16Z 2024-03 2542-4653 http://hdl.handle.net/10259/8854 10.21468/SciPostPhys.16.3.077 2542-4653 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. eng http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess Atribución 4.0 Internacional Faraday rotation and transmittance as markers of topological phase transitions in 2D materials info:eu-repo/semantics/article