Ab initio study of quantized circular photogalvanic effect in chiral multifold semimetals
Le C, Zhang Y, Felser C, Sun Y (2020)
Publication Type: Journal article
Publication year: 2020
Journal
Book Volume: 102
Article Number: 121111
Journal Issue: 12
DOI: 10.1103/PhysRevB.102.121111
Abstract
So far, the circular photogalvanic effect (CPGE) is the only possible quantized signal in Weyl semimetals. With inversion and mirror symmetries broken, Weyl and multifold fermions in band structures with opposite chiralities can stay at different energies and generate a net topological charge. Such a kind of net topological charge can present as a quantized signal in the circular polarized light-induced injection current. According to current theoretical understanding, RhSi and its counterparts are believed to be the most promising candidates for the experimental observation of the quantized CPGE. However, a real quantized signal has yet to be experimentally observed. Since previous theoretical studies for the quantized CPGE were based on an effective model but not realistic band structures, it should lose some crucial details that influence the quantized signal. The current status motivates us to perform a realistic ab initio study for the CPGE. Our result shows that RhSi and PtAl in chiral multifold semimetals are alternative materials for obtaining the quantized CPGE which is very easy to be interfered with by trivial band-related optic transitions, and a fine tuning of the chemical potential by doping is essential for the observation of the quantized CPGE. We perform an ab initio analysis for the quantized CPGE based on a realistic electronic band structure and provide an effective way to solve the current problem for the given materials.
Involved external institutions
Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids
Germany (DE)
Massachusetts Institute of Technology (MIT)
United States (USA) (US)
Germany (DE)
Massachusetts Institute of Technology (MIT)
United States (USA) (US)
How to cite
APA:
Le, C., Zhang, Y., Felser, C., & Sun, Y. (2020). Ab initio study of quantized circular photogalvanic effect in chiral multifold semimetals. Physical Review B, 102(12). https://doi.org/10.1103/PhysRevB.102.121111
MLA:
Le, Congcong, et al. "Ab initio study of quantized circular photogalvanic effect in chiral multifold semimetals." Physical Review B 102.12 (2020).
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