2026-05-12T13:59:25Zhttps://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

Faraday rotation and transmittance as markers of topological phase transitions in 2D materials Calixto, Manuel Mayorgas, Alberto Cordero Tejedor, Nicolás A. Romera, Elvira Castaños Garza, Octavio Héctor Física Physics 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. Funding information We thank the support of Grant PID2022-138144NB-I00 funded by Spanish MICIU and Junta de Andalucía through the projects FEDER/UJA-1381026 and FQM381. AM thanks the Spanish MIU for the FPU19/06376 predoctoral fellowship. OC is on sabbatical leave at Granada University, Spain, since the 1st of September 2023. OC thanks support from the program PASPA from DGAPA-UNAM. 2024-03-20T09:28:16Z 2024-03-20T09:28:16Z 2024-03 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2542-4653 http://hdl.handle.net/10259/8854 10.21468/SciPostPhys.16.3.077 2542-4653 eng SciPost Physics. 2024, V. 16, n. 3, 077 https://doi.org/10.21468/SciPostPhys.16.3.077 info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2022-138144NB-I00/ES/SIMETRIA Y COHERENCIA EN SISTEMAS CRITICOS CUANTICOS/ info:eu-repo/grantAgreement/Junta de Andalucía//1381026//Nuevas metodologías en análisis armónico no conmutativo y aplicaciones en física cuántica e ingeniería/ info:eu-repo/grantAgreement/MIU//FPU2019%2F06376/ Atribución 4.0 Internacional http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess application/pdf SciPost