Journal
PHYSICAL REVIEW B
Volume 98, Issue 16, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.98.161110
Keywords
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Funding
- National Key Research and Development Program of China [2016YFA0401003]
- Natural Science Foundation of China [11774353, 11574320, 11374302, U1432251, U1732274]
- CAS/SAFEA international partnership program for creative research teams of China
- Innovative Program of Development Foundation of Hefei Center for Physical Science and Technology [2018CXFX002]
- 100 Talents Program of Chinese Academy of Sciences (CAS)
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Searching for exotic transport properties in new topological states of matter is an active topic. One of the most fascinating transport phenomena in recently discovered Weyl semimetals (WSMs) is the negative longitudinal magnetoresistivity (nLMR) in the presence of a magnetic field B parallel to an electric field E, which is arguably attributed to the chiral anomaly. Another predicted key effect closely related to the chiral anomaly and the nonzero Berry curvatures in WSMs is the planar Hall effect (PHE), which has not been identified so far. Here we carry out the planar Hall measurements on Cd3As2 nanoplates, and find that, accompanied by the large nLMR, a PHE with nonzero transverse voltage can be developed while tilting the in-plane magnetic field B away from the electric field E. Further experiments reveal that both the PHE and the nLMR can be suppressed synchronously by increasing the temperature, but still visible at room temperature, indicating the same origin of these two effects. Our experiments indicate that PHE may provide another key transport evidence for topologically nontrivial electronic structures in topological materials.
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