A highly asymmetric nodal semimetal in bulk SmB6

Abstract

We show that novel low temperature properties of bulk SmB6, including the sudden growth of the de Haas-van Alphen amplitude (and heat capacity) originating from the bulk at millikelvin temperatures and a previously unreported linear-in-temperature bulk electrical conductivity at liquid helium temperatures, signal the presence of a highly asymmetric nodal semimetal. We show how the highly asymmetric nodal semimetal can be the result of a topological transformation, of the type recently considered by Shen and Fu, occurring in a Kondo lattice with dispersionless f-electron levels and Sm vacancies or other lattice defects. If supported by further data experimental, the existence of a nodal semimetal would cast considerable doubt over a neutral Fermi surface being required to explain the origin of the dHvA effect SmB6.

arXiv comment4 pages including 4 figures

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Cited by in corpus (18)

• Quantum oscillations in flux-grown SmB6 with embedded aluminum
• Robustness of the Insulating Bulk in the Topological Kondo Insulator SmB${}_6$
• Topology and exceptional points of massive Dirac models with generic non-Hermitian perturbations
• Anomalous Conductance Oscillations in the Hybridization Gap of InAs/GaSb Quantum Wells
• Magnetic field-tuned quantum criticality in a Kondo insulator
• Intrinsic bulk quantum oscillations in a bulk unconventional insulator SmB${}_6$
• Topological surface conduction in Kondo insulator YbB${}_{12}$
• Critical role of magnetic moments in heavy-fermion materials: revisiting mysteries of SmB${}_6$
• Resistivity saturation in Kondo insulators
• Hall anomaly, Quantum Oscillations and Possible Lifshitz Transitions in Kondo Insulator YbB${}_{12}$: Evidence for Unconventional Charge Transport
• Magnetic impurities in Kondo insulators: An application to samarium hexaboride
• Diamagnetic Sm${}^{3+}$ in the topological Kondo insulator SmB${}_6$
• Bulk transport paths through defects in floating zone and Al flux grown SmB${}_6$
• Inversion and magnetic quantum oscillations in symmetric periodic Anderson model
• Magnetoquantum Oscillations in the Specific Heat of a Topological Kondo Insulator
• Tunable non-Lifshitz-Kosevich temperature dependence of Shubnikov-de Haas oscillation amplitudes in SmSb
• Quantum oscillations in the heat capacity of Kondo insulator YbB12
• Correlation Induced Magnetic Topological Phases in Mixed-Valence Compound SmB6