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Tunable strong photo-mixing in Weyl semimetals

Journal Article


Abstract


  • We study both the temperature and band-gap dependence of the first-and third-order intraband conductivities of a Weyl semimetal (WSM) as well as the resultant critical field. By a semiclassical model we further explore how different chemical potentials, cone separations, field geometries, and finite relaxation times affect photoresponse. We determine that the band-gap variation is characterized by the Weyl cone separation and observe significant thermal enhancement of the nonlinear response. Universal behaviors of both the linear and nonlinear response have also been observed under certain conditions. Coupled with experimentally accessible critical field values of 104-105 V m-1, our results give strong impetus for the use of WSMs as tunable photo-mixers.

Authors


  •   Zuber, Jack (external author)
  •   Zhao, T (external author)
  •   Gong, S (external author)
  •   Hu, M (external author)
  •   Zhong, R (external author)
  •   Chao Zhang
  •   Liu, S (external author)

Publication Date


  • 2020

Citation


  • Zuber, J. W., Zhao, T., Gong, S., Hu, M., Zhong, R. B., Zhang, C. & Liu, S. G. (2020). Tunable strong photo-mixing in Weyl semimetals. Physical Review B, 101 (8), 085307-1-085307-11.

Scopus Eid


  • 2-s2.0-85082797905

Start Page


  • 085307-1

End Page


  • 085307-11

Volume


  • 101

Issue


  • 8

Place Of Publication


  • United States

Abstract


  • We study both the temperature and band-gap dependence of the first-and third-order intraband conductivities of a Weyl semimetal (WSM) as well as the resultant critical field. By a semiclassical model we further explore how different chemical potentials, cone separations, field geometries, and finite relaxation times affect photoresponse. We determine that the band-gap variation is characterized by the Weyl cone separation and observe significant thermal enhancement of the nonlinear response. Universal behaviors of both the linear and nonlinear response have also been observed under certain conditions. Coupled with experimentally accessible critical field values of 104-105 V m-1, our results give strong impetus for the use of WSMs as tunable photo-mixers.

Authors


  •   Zuber, Jack (external author)
  •   Zhao, T (external author)
  •   Gong, S (external author)
  •   Hu, M (external author)
  •   Zhong, R (external author)
  •   Chao Zhang
  •   Liu, S (external author)

Publication Date


  • 2020

Citation


  • Zuber, J. W., Zhao, T., Gong, S., Hu, M., Zhong, R. B., Zhang, C. & Liu, S. G. (2020). Tunable strong photo-mixing in Weyl semimetals. Physical Review B, 101 (8), 085307-1-085307-11.

Scopus Eid


  • 2-s2.0-85082797905

Start Page


  • 085307-1

End Page


  • 085307-11

Volume


  • 101

Issue


  • 8

Place Of Publication


  • United States