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Surface-induced positive planar Hall effect in topological Kondo insulator <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>SmB</mml:mi><mml:mn>6</mml:mn></mml:msub></mml:math> microribbons
Whether the surface states in ${\mathrm{SmB}}_{6}$ are topological is still a critical issue in the field of topological Kondo insulators. In the magneto-transport study of single crystalline ${\mathrm{SmB}}_{6}$ microribbons, we have revealed a positive planar Hall effect (PHE), the amplitude of which increases dramatically with decreasing temperatures but saturates below …