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Spin-valley locking and bulk quantum Hall effect in a noncentrosymmetric Dirac semimetal BaMnSb2.
Liu, J Y; Yu, J; Ning, J L; Yi, H M; Miao, L; Min, L J; Zhao, Y F; Ning, W; Lopez, K A; Zhu, Y L; Pillsbury, T; Zhang, Y B; Wang, Y; Hu, J; Cao, H B; Chakoumakos, B C; Balakirev, F; Weickert, F; Jaime, M; Lai, Y; Yang, Kun; Sun, J W; Alem, N; Gopalan, V; Chang, C Z; Samarth, N; Liu, C X; McDonald, R D; Mao, Z Q.
Afiliación
  • Liu JY; Department of Physics and Engineering Physics, Tulane University, New Orleans, LA, USA.
  • Yu J; Department of Physics and Astronomy, University of California, Irvine, CA, USA.
  • Ning JL; Department of Physics, The Pennsylvania State University, University Park, PA, USA.
  • Yi HM; Condensed Matter Theory Center, Department of Physics, University of Maryland, College Park, MD, USA.
  • Miao L; Department of Physics and Engineering Physics, Tulane University, New Orleans, LA, USA.
  • Min LJ; Department of Physics, The Pennsylvania State University, University Park, PA, USA.
  • Zhao YF; Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA, USA.
  • Ning W; Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA, USA.
  • Lopez KA; Department of Physics, The Pennsylvania State University, University Park, PA, USA.
  • Zhu YL; Department of Physics, The Pennsylvania State University, University Park, PA, USA.
  • Pillsbury T; Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA, USA.
  • Zhang YB; Department of Physics, The Pennsylvania State University, University Park, PA, USA.
  • Wang Y; Department of Physics, The Pennsylvania State University, University Park, PA, USA.
  • Hu J; Department of Physics and Engineering Physics, Tulane University, New Orleans, LA, USA.
  • Cao HB; Department of Physics, The Pennsylvania State University, University Park, PA, USA.
  • Chakoumakos BC; Department of Physics, University of Arkansas, Fayetteville, AR, USA.
  • Balakirev F; Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA.
  • Weickert F; Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA.
  • Jaime M; Los Alamos National Laboratory, Los Alamos, NM, USA.
  • Lai Y; Los Alamos National Laboratory, Los Alamos, NM, USA.
  • Yang K; Los Alamos National Laboratory, Los Alamos, NM, USA.
  • Sun JW; Los Alamos National Laboratory, Los Alamos, NM, USA.
  • Alem N; Physics Department and National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL, USA.
  • Gopalan V; Department of Physics and Engineering Physics, Tulane University, New Orleans, LA, USA.
  • Chang CZ; Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA, USA.
  • Samarth N; Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA, USA.
  • Liu CX; Department of Physics, The Pennsylvania State University, University Park, PA, USA.
  • McDonald RD; Department of Physics, The Pennsylvania State University, University Park, PA, USA.
  • Mao ZQ; Department of Physics, The Pennsylvania State University, University Park, PA, USA. cxl56@psu.edu.
Nat Commun ; 12(1): 4062, 2021 Jul 01.
Article en En | MEDLINE | ID: mdl-34210963
Spin-valley locking in monolayer transition metal dichalcogenides has attracted enormous interest, since it offers potential for valleytronic and optoelectronic applications. Such an exotic electronic state has sparsely been seen in bulk materials. Here, we report spin-valley locking in a Dirac semimetal BaMnSb2. This is revealed by comprehensive studies using first principles calculations, tight-binding and effective model analyses, angle-resolved photoemission spectroscopy measurements. Moreover, this material also exhibits a stacked quantum Hall effect (QHE). The spin-valley degeneracy extracted from the QHE is close to 2. This result, together with the Landau level spin splitting, further confirms the spin-valley locking picture. In the extreme quantum limit, we also observed a plateau in the z-axis resistance, suggestive of a two-dimensional chiral surface state present in the quantum Hall state. These findings establish BaMnSb2 as a rare platform for exploring coupled spin and valley physics in bulk single crystals and accessing 3D interacting topological states.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2021 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Nat Commun Asunto de la revista: BIOLOGIA / CIENCIA Año: 2021 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido