Helicity-dependent Ultrafast Photocurrents in Weyl Magnet Mn$_3$Sn
| Title: | Helicity-dependent Ultrafast Photocurrents in Weyl Magnet Mn$_3$Sn |
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| Authors: | Hamara, Dominik, Lange, Gunnar F., Kholid, Farhan Nur, Markou, Anastasios, Felser, Claudia, Slager, Robert-Jan, Ciccarelli, Chiara |
| Source: | Communications Physics 6, 320 (2023) |
| Publication Year: | 2023 |
| Collection: | Condensed Matter Quantum Physics |
| Subject Terms: | Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Materials Science, Condensed Matter - Strongly Correlated Electrons, Quantum Physics |
| More Details: | We present an optical pump-THz emission study on non-collinear antiferromagnet Mn$_3$Sn. We show that Mn$_3$Sn acts as a source of THz radiation when irradiated by femtosecond laser pulses. The polarity and amplitude of the emitted THz fields can be fully controlled by the polarisation of optical excitation. We explain the THz emission with the photocurrents generated via the photon drag effect by combining various experimental measurements as a function of pump polarisation, magnetic field, and sample orientation with thorough symmetry analysis of response tensors. Comment: 10+13 pages; 4+5 figures |
| Document Type: | Working Paper |
| DOI: | 10.1038/s42005-023-01440-5 |
| Access URL: | http://arxiv.org/abs/2302.07286 |
| Accession Number: | edsarx.2302.07286 |
| Database: | arXiv |
| DOI: | 10.1038/s42005-023-01440-5 |
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