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  Population inversion and ultrafast terahertz nonlinearity of transient Dirac fermions in Cd3As2

Zhu, C., Pilch, P., Dantas, R. M. A., Reinold, A., Yang, Y., Xiu, F., et al. (2024). Population inversion and ultrafast terahertz nonlinearity of transient Dirac fermions in Cd3As2. Physical Review B, 109(20): L201111. doi:10.1103/PhysRevB.109.L201111.

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Item Permalink: https://hdl.handle.net/21.11116/0000-000F-638F-1 Version Permalink: https://hdl.handle.net/21.11116/0000-000F-6390-E
Genre: Journal Article

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PhysRevB.109.L201111.pdf (Publisher version), 774KB
 
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https://doi.org/10.1103/PhysRevB.109.L201111 (Publisher version)
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 Creators:
Zhu, Changqing1, Author
Pilch, Patrick1, Author
Dantas, Renato M. A.1, Author
Reinold, Anneke1, Author
Yang, Yunkun1, Author
Xiu, Faxian1, Author
Bedoya-Pinto, Amilcar2, Author                 
Parkin, Stuart S. P.2, Author                 
Moessner, Roderich1, Author
Wang, Zhe1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Nano-Systems from Ions, Spins and Electrons, Max Planck Institute of Microstructure Physics, Max Planck Society, ou_3287476              

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 Abstract: Harmonic generation provides an efficient tool for the study of ultrafast nonlinear dynamics. We report on time-resolved optical-pump terahertz harmonic generation spectroscopic investigation of ultrafast nonlinearity in a prototypical three-dimensional Dirac semimetal, Cd3⁢As2. A transient population inversion characterized by excessive nonthermal Dirac electrons and holes is found to be very sensitive and responsive to a periodic terahertz drive, leading to very efficient terahertz third-harmonic generation. Based on the Boltzmann transport theory, we analyze the terahertz field-driven kinetics of the transient Dirac fermions that is responsible for the observed strong terahertz nonlinearity.

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 Dates: 2024-05-102024-05-15
 Publication Status: Issued
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 Identifiers: DOI: 10.1103/PhysRevB.109.L201111
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 109 (20) Sequence Number: L201111 Start / End Page: - Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008