Chiral Magnetic Effect in Condensed Matter
ORAL
Abstract
The chiral magnetic effect (CME) is the generation of electric current induced by chirality imbalance in the presence of magnetic field - a macroscopic manifestation of the quantum anomaly in relativistic field theory of chiral fermions. The recent discovery of Dirac and Weyl semimetals opened a fascinating possibility to study this phenomenon in condensed matter experiments. Magneto-transport in ZrTe$_5$ shows a strong evidence for CME. Our ARPES experiments show that this material's electronic structure is consistent with a highly anisotropic 3D Dirac semimetal. We observe a large negative magnetoresistance in parallel magnetic field, with the quadratic field dependence of the magneto-conductance - a clear indication of the CME.
*This work is supported by the US Department of Energy and ARO
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