Absence of Weyl nodes in EuCd2As2 revealed by the carrier density dependence of the anomalous Hall effect
Source abstract
Abstract
EuCd${}2$As${}2$ has been widely considered as a leading candidate for the ideal Weyl semimetal. However, a recent study challenged this view by discovering a substantial band gap in this system. Here, the authors successfully synthesize highly insulating EuCd${}2$As${}2$. It reveals a decrease of the anomalous Hall conductivity (AHC) by orders of magnitude as the carrier density decreases, contradicting the expected behavior of intrinsic AHC generated by the Weyl points. The results suggest that EuCd${}2$As${}2$ is a magnetic semiconductor rather than a Weyl semimetal.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Topological Materials and Phenomena · Graphene research and applications · Quantum and electron transport phenomena
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Physics, University of Washington, Seattle, Washington 98195, USA
Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195, USA
Department of Physics, University of Alabama at Birmingham, Birmingham, Alabama 35294, USA
Department of Electrical and Computer Engineering, University of Washington, Seattle, Washington 98195, USA
Funding
Air Force Office of Scientific Research · U.S. Department of Energy · National Science Foundation
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