Surface-induced positive planar Hall effect in topological Kondo insulator SmB6 microribbons

Abstract

Whether the surface states in SmB6 are topological is still a critical issue in the field of topological Kondo insulators. In the magneto-transport study of single crystalline SmB6 microribbons, we have revealed a positive planar Hall effect (PHE), the amplitude of which increases dramatically with decreasing temperatures but saturates below 5 K. This positive PHE is ascribed to the surface states of SmB6 and expected to arise from the anisotropy in lifting the topological protection from back-scattering by the in-plane magnetic field, thus suggesting the topological nature of surface states in SmB6. On the contrary, a negative PHE is observed for the bulk states at high temperatures, which is almost three orders of magnitudes weaker than the surface-induced positive PHE.

References in corpus (27)

• Topological Insulators
• Topological insulators and superconductors
• Discovery (theoretical prediction and experimental observation) of a large-gap topological-insulator class with spin-polarized single-Dirac-cone on the surface
• Topological Kondo Insulators
• Surface electronic structure of the topological Kondo insulator candidate correlated electron system SmB6
• Low-temperature surface conduction in the Kondo insulator SmB${}_6$
• Chiral anomaly as origin of planar Hall effect in Weyl semimetals
• Topological surface state in the Kondo Insulator Samarium Hexaboride
• Robust Surface Hall Effect and Nonlocal Transport in SmB6: Indication for an Ideal Topological Insulator
• Observation of in-gap surface states in the Kondo insulator SmB6 by photoemission
• Giant Planar Hall Effect in Topological Metals
• Surface and Bulk Electronic Structure of the Strongly Correlated System SmB${}_6$ and Implications for a Topological Kondo Insulator
• Planar Hall effect in the Weyl semimetal GdPtBi
• Anisotropic Magnetoresistance Effects in Fe, Co, Ni, Fe_4N, and Half-Metallic Ferromagnet: A Systematic Analysis
• Planar Hall effect from the surface of topological insulators
• Hybridization, Inter-Ion Correlation, and Surface States in the Kondo Insulator SmB6
• Giant anisotropic magnetoresistance and planar Hall effect in the Dirac semimetal Cd3As2
• Tuning bulk and surface conduction in topological Kondo insulator SmB6
• Kondo Breakdown in Topological Kondo Insulators
• One-dimensional edge state transport in a topological Kondo insulator
• Samarium hexaboride: A trivial surface conductor
• Probing the Chiral Anomaly by Planar Hall Effect in Three-dimensional Dirac Semimetal Cd3As2 Nanoplates
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• Temperature Dependence of Linked Gap and Surface State Evolution in the Mixed Valent Topological Insulator SmB6
• Signature of surface state coupling in thin films of the topological Kondo insulator SmB${}_6$ from anisotropic magnetoresistance

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• Complex field-, temperature-, and angle-dependent Hall effects from intrinsic Fermi surface revealed by first-principles calculations
• Planar Hall Plateau in Magnetic Weyl Semimetals
• Abnormal planar Hall effect and disentanglement of incoherent and coherent transport in a Kondo lattice