2019/05/08 by M. Tanaka, Miuko Tanaka, Yuya Shimazaki +6
Materials Science · Physics and Astronomy · #Antiferromagnetism #Bilayer graphene #Charge (physics) #Condensed matter physics #Electron #Graphene #Graphene research and applications #Physics #Point reflection #Quantum Hall effect #Quantum and electron transport phenomena #Quantum mechanics #Quantum spin Hall effect #Spin Hall effect #Spin polarization #Topological Materials and Phenomena #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevlett.126.016801
published as Phys. Rev. Lett. 126, 016801 (2021)
arxiv created 2019/05/08 · openalex publication_date 2021/01/06 · arxiv updated 2021/01/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
The intrinsic Hall effect allows for the generation of a nondissipative charge neutral current, such as a pure spin current generated via the spin Hall effect. Breaking of the spatial inversion or time reversal symmetries, or the spin-orbit interaction is generally considered necessary for the generation of such a charge neutral current. Here, we challenge this general concept and present generation and detection of a charge neutral current in a centrosymmetric material with little spin-orbit interaction. We employ bilayer graphene, and find enhanced nonlocal transport in the quantum Hall antiferromagnetic state, where spontaneous symmetry breaking occurs due to the electronic correlation.