Signature of the chiral anomaly in a Dirac semimetal: a current plume steered by a magnetic field
arXiv:1503.08179
Abstract
In this talk, we describe recent experimental progress in detecting the chiral anomaly in the Dirac semimetal NaBi in the presence of a magnetic field. The chiral anomaly, which plays a fundamental role in chiral gauge theories, was predicted to be observable in crystals by Nielsen and Ninomiya in 1983 [1]. Theoretical progress in identifying and investigating Dirac and Weyl semimetals has revived strong interest in this issue [2-6]. In the Dirac semimetal, the breaking of time-reversal symmetry by a magnetic field splits each Dirac node into two chiral Weyl nodes. If an electric field is applied parallel to , charge is predicted to flow between the Weyl nodes. We report the observation in the Dirac semimetal NaBi of a novel, negative and highly anisotropic magnetoresistance (MR). We show that the enhanced conductivity has the form of a narrowly defined plume that can be steered by the applied field. The novel MR is acutely sensitive to deviations of from , a feature incompatible with conventional transport. The locking of the current plume to the field appears to be a defining signature of the chiral anomaly.
arXiv comment8 pages, 8 figures, based on a talk by NPO at APS March Meeting, San Antonio, 2015
References in corpus (10)
- Discovery of a Three-dimensional Topological Dirac Semimetal, Na3Bi
- Dirac semimetal and topological phase transitions in A3Bi (A=Na, K, Rb)
- Ultrahigh mobility and giant magnetoresistance in the Dirac semimetal CdAs
- Observation of a topological 3D Dirac semimetal phase in high-mobility Cd3As2
- Chiral Anomaly and Classical Negative Magnetoresistance of Weyl Metals
- Experimental Realization of a Three-Dimensional Dirac Semimetal
- Quantum Hall effects in a Weyl Semi-Metal: possible application in pyrochlore Iridates
- Recent developments in transport phenomena in Weyl semimetals
- Landau Quantization and Quasiparticle Interference in the Three-Dimensional Dirac Semimetal Cd3As2
- Universal phase diagrams for the quantum spin Hall systems
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