Journal
PHYSICAL REVIEW LETTERS
Volume 117, Issue 14, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.117.146603
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Funding
- EPiQS initiative of the Gordon and Betty Moore Foundation
- JSPS from MEXT, Japan [24224009, 26103006]
- ImPACT Program of Council for Science, Technology and Innovation (Cabinet office, Government of Japan)
- Grants-in-Aid for Scientific Research [26103006] Funding Source: KAKEN
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We theoretically propose that giant magnetochiral anisotropy is achieved in Weyl semimetals in noncentrosymmetric crystals as a consequence of the chiral anomaly. The magnetochiral anisotropy is the nonlinearity of the resistivity rho that depends on the current I and the magnetic field B as rho=rho(0)(1+gamma I . B), and can be applied to rectifier devices controlled by B. We derive the formula for the coefficient. in noncentrosymmetric Weyl semimetals. The obtained formula for gamma shows that the magnetochiral anisotropy is strongly enhanced when the chemical potential is tuned to Weyl points, and that noncentrosymmetric Weyl semimetals such as TaAs can exhibit much larger magnetochiral anisotropy than that observed in other materials so far.
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