Weyl-Kondo semimetal in heavy-fermion systems.
| Autor: | Lai HH; Department of Physics and Astronomy, Rice University, Houston, TX 77005; qmsi@rice.edu hl53@rice.edu.; Rice Center for Quantum Materials, Rice University, Houston, TX 77005., Grefe SE; Department of Physics and Astronomy, Rice University, Houston, TX 77005.; Rice Center for Quantum Materials, Rice University, Houston, TX 77005., Paschen S; Institute of Solid State Physics, Vienna University of Technology, 1040 Vienna, Austria., Si Q; Department of Physics and Astronomy, Rice University, Houston, TX 77005; qmsi@rice.edu hl53@rice.edu.; Rice Center for Quantum Materials, Rice University, Houston, TX 77005. |
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| Jazyk: | angličtina |
| Zdroj: | Proceedings of the National Academy of Sciences of the United States of America [Proc Natl Acad Sci U S A] 2018 Jan 02; Vol. 115 (1), pp. 93-97. Date of Electronic Publication: 2017 Dec 18. |
| DOI: | 10.1073/pnas.1715851115 |
| Abstrakt: | Insulating states can be topologically nontrivial, a well-established notion that is exemplified by the quantum Hall effect and topological insulators. By contrast, topological metals have not been experimentally evidenced until recently. In systems with strong correlations, they have yet to be identified. Heavy-fermion semimetals are a prototype of strongly correlated systems and, given their strong spin-orbit coupling, present a natural setting to make progress. Here, we advance a Weyl-Kondo semimetal phase in a periodic Anderson model on a noncentrosymmetric lattice. The quasiparticles near the Weyl nodes develop out of the Kondo effect, as do the surface states that feature Fermi arcs. We determine the key signatures of this phase, which are realized in the heavy-fermion semimetal Ce Competing Interests: The authors declare no conflict of interest. (Copyright © 2017 the Author(s). Published by PNAS.) |
| Databáze: | MEDLINE |
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