CoTe2: A Quantum Critical Dirac Metal with Strong Spin Fluctuations
Source abstract
Abstract
Abstract Quantum critical points separating weak ferromagnetic and paramagnetic phases trigger many novel phenomena. Dynamical spin fluctuations not only suppress the long‐range order, but can also lead to unusual transport and even superconductivity. Combining quantum criticality with topological electronic properties presents a rare and unique opportunity. Here, by means of ab initio calculations and magnetic, thermal, and transport measurements, it is shown that the orthorhombic CoTe2 is close to ferromagnetism, which appears suppressed by spin fluctuations. Calculations and transport measurements reveal nodal Dirac lines, making it a rare combination of proximity to quantum criticality and Dirac topology.
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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 and Astronomy George Mason University Fairfax VA 22030 USA
Quantum Science and Engineering Center George Mason University Fairfax VA 22030 USA
Thomas Jefferson High School Alexandria VA 22312 USA
Central Department of Physics Tribhuvan University Kirtipur Kathmandu 44613 Nepal
Department of Chemistry and Biochemistry George Mason University Fairfax VA 22030 USA
Physics Department Georgetown University Washington DC 20057 USA
Materials Science and Engineering Division National Institute of Standards and Technology (NIST) Gaithersburg Maryland 20899 USA
Theiss Research, Inc. La Jolla CA 92037 USA
Funding
National Science Foundation · U.S. Department of Energy · U.S. Department of Commerce · Alexander von Humboldt-Stiftung
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