ICTS:29161

Video URL

Optical probing and control of 2D Materials

Optical probing and control of 2D Materials

(2024). Optical probing and control of 2D Materials. SciVideos. https://youtube.com/live/2gE9YBfbx1k

Optical probing and control of 2D Materials. SciVideos, Jul. 23, 2024, https://youtube.com/live/2gE9YBfbx1k 

          @misc{ scivideos_ICTS:29161,
            doi = {},
            url = {https://youtube.com/live/2gE9YBfbx1k},
            author = {},
            keywords = {},
            language = {en},
            title = {Optical probing and control of 2D Materials},
            publisher = {},
            year = {2024},
            month = {jul},
            note = {ICTS:29161 see, \url{https://scivideos.org/icts-tifr/29161}}
          }
Gregory A Fiete
Talk numberICTS:29161
Source RepositoryICTS-TIFR
Source EventEngineered 2D Quantum Materials
Collection

Abstract

Illuminating a material with light can reveal both interesting aspects of electronic and lattice degrees of freedom, as well as drive phase and topological transitions in the material itself. In this talk, I will focus on three distinct responses of a material to light: (1) Nonlinear phononic control of magnetism in bilayer CrI3, MnBi2Te4, and MnSb2Te4. (2) The non-linear photogalvanic response of Weyl semimetals with tilted cones and chiral charge up to 4 (the largest allowed in a lattice model), as well as the topological superconductor candidate 4Hb-TaS2, and (3) The coupling of phonons to electronic degrees of freedom to produce chiral phonons with large g-factors of order 1, which can be measured with Raman scattering. For nonlinear phononic control of magnetism, I will show how intense THz light can be used to transiently modify magnetic exchange constants, including their sign. In the case of the non-linear current response of Weyl systems, I will review how the quantum geometry...