Optical response of the chiral topological semimetal RhSi

Zhi Li, Toshiaki Iitaka, Haibo Zeng, and Haibin Su
Phys. Rev. B 100, 155201 – Published 1 October 2019

Abstract

Motivated by the emergent fermions in the chiral topological semimetal RhSi, which has bulk higher-spin chiral fermions with a topological charge of ±2, respectively, we studied the shift vector induced nonlinear optical conductivity σzxy(2)(0;ω,ω) of bulk RhSi by first-principles calculation. Our calculation demonstrates that the maximal σzxy(2)(0;ω,ω) is about 180μA/V2 under an optical field with a photon energy of 20 meV. With a photon energy large than 450 meV, σzxy(2)(0;ω,ω) is relatively small. Especially, the calculated σzxy(2)(0;ω,ω) is almost vanishing within a photon energy range of 450–500 meV. Below 300 meV, our calculation also reveals that the dielectric function and reflectivity decreases with an increase of photon energy, while the absorption coefficient increases with an increase of photon energy. Therefore, RhSi has a potential application for optoelectronic detection in the terahertz range.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 25 July 2019
  • Revised 18 September 2019

DOI:https://doi.org/10.1103/PhysRevB.100.155201

©2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Zhi Li1, Toshiaki Iitaka2, Haibo Zeng1,*, and Haibin Su3,†

  • 1MIIT Key Laboratory of Advanced Display Materials and Devices, Ministry of Industry and Information Technology, Institute of Optoelectronics & Nanomaterials, Nanjing University of Science and Technology, Nanjing 210094, China
  • 2Computational Engineering Applications Unit, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
  • 3Department of Chemistry, The Hong Kong University of Science and Technology, Hong Kong, China

  • *haibo@njust.edu.cn
  • haibinsu@ust.hk

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 100, Iss. 15 — 15 October 2019

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×