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Title: Strain-induced chiral magnetic effect in Weyl semimetals

Here, we argue that strain applied to a time-reversal and inversion breaking Weyl semimetal in a magnetic field can induce an electric current via the chiral magnetic effect. A tight-binding model is used to show that strain generically changes the locations in the Brillouin zone but also the energies of the band touching points (tips of the Weyl cones). Since axial charge in a Weyl semimetal can relax via intervalley scattering processes, the induced current will decay with a time scale given by the lifetime of a chiral quasiparticle. Lastly, we estimate the strength and lifetime of the current for typical material parameters and find that it should be experimentally observable.
Authors:
 [1] ;  [2] ;  [3] ;  [1]
  1. Institute of Materials Science of Madrid (Spain)
  2. Stony Brook Univ., NY (United States). Dept. of Physics and Astronomy; Brookhaven National Lab. (BNL), Upton, NY (United States). Department of Physics and RIKEN-BNL Research Center
  3. Institute of Theoretical Physics UAM/CSIC, Madrid (Spain)
Publication Date:
Report Number(s):
BNL-113962-2017-JA
Journal ID: ISSN 2469-9950; KB0301020; TRN: US1702677
Grant/Contract Number:
SC0012704; FG02-88ER40388; AC02-98CH10886; FG- 88ER40388
Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 94; Journal Issue: 24; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE
OSTI Identifier:
1376105
Alternate Identifier(s):
OSTI ID: 1336859