RT info:eu-repo/semantics/article
T1 Faraday rotation and transmittance as markers of topological phase transitions in 2D materials
A1 Calixto, Manuel
A1 Mayorgas, Alberto
A1 Cordero Tejedor, Nicolás A.
A1 Romera, Elvira
A1 Castaños Garza, Octavio Héctor
K1 Física
K1 Physics
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.
PB SciPost
SN 2542-4653
YR 2024
FD 2024-03
LK http://hdl.handle.net/10259/8854
UL http://hdl.handle.net/10259/8854
LA eng
NO 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.
DS Repositorio Institucional de la Universidad de Burgos
RD 23-nov-2024