Hysteretic Magnetotransport in SmB6 at Low Magnetic Fields

Abstract

Utilizing Corbino disc structures, we have examined the magnetic field response of resistivity for the surface states of SmB6 on different crystalline surfaces at low temperatures. Our results reveal a hysteretic behavior whose magnitude depends on the magnetic field sweep rate and temperature. Although this feature becomes smaller when the field sweep is slower, a complete elimination or saturation is not observed in our slowest sweep-rate measurements, which is much slower than a typical magnetotransport trace. These observations cannot be explained by quantum interference corrections such as weak anti-localization. Instead, they are consistent with behaviors of glassy surface magnetic ordering, whose magnetic origin is most likely from samarium oxide (Sm2O3) forming on the surface during exposure to ambient conditions.

References in corpus (11)

• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• Surface quantized anomalous Hall current and magneto-electric effect in magnetically disordered topological insulators
• Surface electronic structure of the topological Kondo insulator candidate correlated electron system SmB6
• Correlated Topological Insulators with Mixed Valence
• Direct observation of the spin texture in strongly correlated SmB6 as evidence of the topological Kondo insulator
• Ordering of magnetic impurities and tunable electronic properties of topological insulators
• Hybridization, Inter-Ion Correlation, and Surface States in the Kondo Insulator SmB6
• Tuning bulk and surface conduction in topological Kondo insulator SmB6
• Emergence of a coherent in-gap state in SmB6 Kondo insulator revealed by scanning tunneling spectroscopy
• Correlation between bulk thermodynamic measurements and the low temperature resistance plateau in SmB6
• Electron coherence at low temperatures: The role of magnetic impurities

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