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Kerr/Faraday rotation in quantum materials

Grant number: 18/06142-5
Support type:Regular Research Grants
Duration: July 01, 2019 - June 30, 2021
Field of knowledge:Physical Sciences and Mathematics - 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


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)