Chiral magnetic photocurrent in Dirac and Weyl materials
Abstract
Circularly polarized light (CPL) can induce an asymmetry between the number of left- and right-handed chiral quasiparticles in Dirac and Weyl semimetals. Here, we show that if the photoresponse of the material is dominated by chiral quasiparticles, the total chiral charge induced in the material by CPL can be evaluated in a model-independent way through the chiral anomaly. In the presence of an external magnetic field perpendicular to the incident CPL, this allows us to predict the linear density of the induced photocurrent resulting from the chiral magnetic effect. The predicted effect should exist in any kind of Dirac or Weyl materials, with both symmetric and asymmetric band structure. An estimate of the resulting chiral magnetic photocurrent in a typical Dirac semimetal irradiated by an infrared laser of intensity ≃5×106W/m2 and a wavelength of λ≃10μm in an external magnetic field B≃2T yields a current J≃50nA in the laser spot of size ≃50μm. Here, this current scales linearly with the magnetic field and wavelength, opening up possibilities for applications in photonics, optoelectronics, and THz sensing.
- Authors:
-
[2];
[1]
- Stony Brook Univ., NY (United States)
- Stony Brook Univ., NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
- Publication Date:
- Research Org.:
- Stony Brook Univ., NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1496878
- Alternate Identifier(s):
- OSTI ID: 1503518; OSTI ID: 1546162; OSTI ID: 1806562
- Report Number(s):
- BNL-211462-2019-JAAM
Journal ID: ISSN 2469-9950; PRBMDO
- Grant/Contract Number:
- SC0017662; SC0012704; SC-0017662; FG-88ER40388; AC02-98CH10886
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 99; Journal Issue: 7; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Dirac semimetal; Weyl semimetal; Dirac fermion; Weyl fermion
Citation Formats
Kaushik, Sahal, Kharzeev, Dmitri E., and Philip, Evan John. Chiral magnetic photocurrent in Dirac and Weyl materials. United States: N. p., 2019.
Web. doi:10.1103/PhysRevB.99.075150.
Kaushik, Sahal, Kharzeev, Dmitri E., & Philip, Evan John. Chiral magnetic photocurrent in Dirac and Weyl materials. United States. https://doi.org/10.1103/PhysRevB.99.075150
Kaushik, Sahal, Kharzeev, Dmitri E., and Philip, Evan John. Mon .
"Chiral magnetic photocurrent in Dirac and Weyl materials". United States. https://doi.org/10.1103/PhysRevB.99.075150. https://www.osti.gov/servlets/purl/1496878.
@article{osti_1496878,
title = {Chiral magnetic photocurrent in Dirac and Weyl materials},
author = {Kaushik, Sahal and Kharzeev, Dmitri E. and Philip, Evan John},
abstractNote = {Circularly polarized light (CPL) can induce an asymmetry between the number of left- and right-handed chiral quasiparticles in Dirac and Weyl semimetals. Here, we show that if the photoresponse of the material is dominated by chiral quasiparticles, the total chiral charge induced in the material by CPL can be evaluated in a model-independent way through the chiral anomaly. In the presence of an external magnetic field perpendicular to the incident CPL, this allows us to predict the linear density of the induced photocurrent resulting from the chiral magnetic effect. The predicted effect should exist in any kind of Dirac or Weyl materials, with both symmetric and asymmetric band structure. An estimate of the resulting chiral magnetic photocurrent in a typical Dirac semimetal irradiated by an infrared laser of intensity ≃5×106W/m2 and a wavelength of λ≃10μm in an external magnetic field B≃2T yields a current J≃50nA in the laser spot of size ≃50μm. Here, this current scales linearly with the magnetic field and wavelength, opening up possibilities for applications in photonics, optoelectronics, and THz sensing.},
doi = {10.1103/PhysRevB.99.075150},
journal = {Physical Review B},
number = 7,
volume = 99,
place = {United States},
year = {Mon Feb 25 00:00:00 EST 2019},
month = {Mon Feb 25 00:00:00 EST 2019}
}
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