Helicity-dependent Ultrafast Photocurrents in Weyl Magnet Mn$_3$Sn

Dominik Hamara; Gunnar F. Lange; Farhan Nur Kholid; Anastasios Markou; Claudia Felser; Robert-Jan Slager; Chiara Ciccarelli

doi:10.1038/s42005-023-01440-5

Helicity-dependent Ultrafast Photocurrents in Weyl Magnet Mn$_3$Sn

Mesoscale and Nanoscale Physics 2023-11-09 v1 Materials Science Strongly Correlated Electrons Quantum Physics

Authors: Dominik Hamara , Gunnar F. Lange , Farhan Nur Kholid , Anastasios Markou , Claudia Felser , Robert-Jan Slager , Chiara Ciccarelli

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Abstract

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.

Keywords

weyl magnet thz emission non-collinear antiferromagnet photocurrent photon drag effect symmetry analysis

Cite

@article{arxiv.2302.07286,
  title  = {Helicity-dependent Ultrafast Photocurrents in Weyl Magnet Mn$_3$Sn},
  author = {Dominik Hamara and Gunnar F. Lange and Farhan Nur Kholid and Anastasios Markou and Claudia Felser and Robert-Jan Slager and Chiara Ciccarelli},
  journal= {arXiv preprint arXiv:2302.07286},
  year   = {2023}
}

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10+13 pages; 4+5 figures

Helicity-dependent Ultrafast Photocurrents in Weyl Magnet Mn$_3$Sn

Abstract

Keywords

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