Kerr/Faraday rotation in quantum materials

• Grant number: 18/06142-5
• Support type: Regular Research Grants
• Duration: July 01, 2019 - June 30, 2022
• Field of knowledge: Physical Sciences and Mathematics - Physics - Condensed Matter Physics
• Principal Investigator: Felix Guillermo Gonzalez Hernandez
• Grantee: Felix Guillermo Gonzalez Hernandez
• Home Institution: Instituto de Física (IF). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

In recent years there has been a growing interest for materials where quantum effects manifest in a wide range of energies and scales. Such materials are called quantum materials and include superconductors, graphene, topological, semi-metallic Weyl insulation, quantum spin liquids, and spin gels. Many of the properties of these systems derive from their low dimensionality, in particular the confinement of electrons in two-dimensional sheets. In this project, we plan to study the optical response of this type of systems using the polarization rotation of waves transmitted (or reflected) by these materials in Faraday (or Kerr rotation) rotation measurements. Specifically, we will focus the research on spin transport in 2D materials (2DEGs in GaAs) and in the optical response quantization in topological insulators (HgTe). For the first type of system, we will use light in the infrared and, for the second type, radiation in the terahertz region. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

GUSEV, G. M.; OLSHANETSKY, E. B.; HERNANDEZ, F. G. G.; RAICHEV, O. E.; MIKHAILOV, N. N.; DVORETSKY, S. A. Multiple crossings of Landau levels of two-dimensional fermions in double HgTe quantum wells. Physical Review B, v. 103, n. 3 JAN 13 2021. Web of Science Citations: 0.

HERNANDEZ, F. G. G.; FERREIRA, G. J.; LUENGO-KOVAC, M.; SIH, V; KAWAHALA, N. M.; GUSEV, G. M.; BAKAROV, A. K. Electrical control of spin relaxation anisotropy during drift transport in a two-dimensional electron gas. Physical Review B, v. 102, n. 12 SEP 15 2020. Web of Science Citations: 0.

KAWAHALA, N. M.; MORAES, F. C. D.; GUSEV, G. M.; BAKAROV, A. K.; HERNANDEZ, F. G. G. Experimental analysis of the spin-orbit coupling dependence on the drift velocity of a spin packet. AIP ADVANCES, v. 10, n. 6 JUN 1 2020. Web of Science Citations: 0.