UOTe: Kondo-Interacting Topological Antiferromagnet in a Van der Waals Lattice.

Autor: Broyles C; Department of Physics, Washington University in St. Louis, St. Louis, MO, 63130, USA., Mardanya S; Department of Physics and Astronomy, Howard University, Washington, DC, 20059, USA., Liu M; Department of Physics, Harvard University, Cambridge, MA, 02138, USA., Ahn J; Department of Physics, Harvard University, Cambridge, MA, 02138, USA., Dinh T; Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, 02138, USA., Alqasseri G; Department of Physics and Astronomy, Howard University, Washington, DC, 20059, USA., Garner J; Department of Physics and Astronomy, Howard University, Washington, DC, 20059, USA., Rehfuss Z; Department of Physics, Washington University in St. Louis, St. Louis, MO, 63130, USA., Guo K; Department of Physics, Washington University in St. Louis, St. Louis, MO, 63130, USA., Zhu J; Department of Physics, Washington University in St. Louis, St. Louis, MO, 63130, USA., Martinez D; Department of Physics, Washington University in St. Louis, St. Louis, MO, 63130, USA., Li D; Department of Physics, Washington University in St. Louis, St. Louis, MO, 63130, USA., Hao Y; Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA., Cao H; Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA., Boswell M; Department of Chemistry, Michigan State University, East Lansing, MI, 48824, USA., Xie W; Department of Chemistry, Michigan State University, East Lansing, MI, 48824, USA., Philbrick JG; Department of Physics, University of Arizona, Tucson, AZ, 85721, USA., Kong T; Department of Physics, University of Arizona, Tucson, AZ, 85721, USA., Yang L; Department of Physics, Washington University in St. Louis, St. Louis, MO, 63130, USA., Vishwanath A; Department of Physics, Harvard University, Cambridge, MA, 02138, USA., Kim P; Department of Physics, Harvard University, Cambridge, MA, 02138, USA., Xu SY; Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, 02138, USA., Hoffman JE; Department of Physics, Harvard University, Cambridge, MA, 02138, USA., Denlinger JD; Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA., Chowdhury S; Department of Physics and Astronomy, Howard University, Washington, DC, 20059, USA., Ran S; Department of Physics, Washington University in St. Louis, St. Louis, MO, 63130, USA.
Jazyk: angličtina
Zdroj: Advanced materials (Deerfield Beach, Fla.) [Adv Mater] 2024 Nov 26, pp. e2414966. Date of Electronic Publication: 2024 Nov 26.
DOI: 10.1002/adma.202414966
Abstrakt: Since the initial discovery of 2D van der Waals (vdW) materials, significant effort has been made to incorporate the three properties of magnetism, band structure topology, and strong electron correlations-to leverage emergent quantum phenomena and expand their potential applications. However, the discovery of a single vdW material that intrinsically hosts all three ingredients has remained an outstanding challenge. Here, the discovery of a Kondo-interacting topological antiferromagnet is reported in the vdW 5f electron system UOTe. It has a high antiferromagnetic (AFM) transition temperature of 150 K, with a unique AFM configuration that breaks the combined parity and time reversal (PT) symmetry in an even number of layers while maintaining zero net magnetic moment. This angle-resolved photoemission spectroscopy (ARPES) measurements reveal Dirac bands near the Fermi level, which combined with the theoretical calculations demonstrate UOTe as an AFM Dirac semimetal. Within the AFM order, the presence of the Kondo interaction is observed, as evidenced by the emergence of a 5f flat band near the Fermi level below 100 K and hybridization between the Kondo band and the Dirac band. The density functional theory calculations in its bilayer form predict UOTe as a rare example of a fully-compensated AFM Chern insulator.
(© 2024 Wiley‐VCH GmbH.)
Databáze: MEDLINE
Externí odkaz: