Heavy surface state in a possible topological Kondo insulator: Magneto-thermoelectric transport on the (011)-plane of SmB${}_6$

Abstract

Motivated by the high sensitivity to Fermi surface topology and scattering mechanisms in magneto-thermoelectric transport, we have measured the thermopower and Nernst effect on the (011)-plane of the proposed topological Kondo insulator SmB${}_6$. These experiments, together with electrical resistivity and Hall effect measurements, demonstrate that the (011)-plane also harbors a metallic surface with the effective mass in the order of 10-10${}^2$ $m_0$. The surface and bulk conductances are well distinguished in these measurements and are categorized into metallic and non-degenerate semiconducting regimes, respectively. Electronic correlations play an important role in enhancing scattering and also contribute to the heavy surface state.

arXiv comment4 figures, 1 table

References in corpus (30)

• Topological insulators and superconductors
• Topological Insulators in Three Dimensions
• Topological Field Theory of Time-Reversal Invariant Insulators
• Topological invariants of time-reversal-invariant band structures
• Topological Kondo Insulators
• Large bulk resistivity and surface quantum oscillations in the topological insulator Bi2Te2Se
• The Nernst effect in high-$T_c$ superconductors
• Surface electronic structure of the topological Kondo insulator candidate correlated electron system SmB6
• Low-temperature surface conduction in the Kondo insulator SmB${}_6$
• Correlated Topological Insulators with Mixed Valence
• Topological surface state in the Kondo Insulator Samarium Hexaboride
• Quantum oscillations in Kondo Insulator SmB${}_6$
• Robust Surface Hall Effect and Nonlocal Transport in SmB6: Indication for an Ideal Topological Insulator
• A theory of Topological Kondo Insulators
• Direct observation of the spin texture in strongly correlated SmB6 as evidence of the topological Kondo insulator
• Surface and Bulk Electronic Structure of the Strongly Correlated System SmB${}_6$ and Implications for a Topological Kondo Insulator
• Cubic Topological Kondo Insulators
• High-Field Shubnikov-de Haas Oscillations in the Topological Insulator Bi${}_2$Te${}_2$Se
• Anomalous-Hall heat current and Nernst effect in the ferromagnet CuCr_2Se_{4-x}Br_x
• Hybridization, Inter-Ion Correlation, and Surface States in the Kondo Insulator SmB6
• Evidence for massive bulk Dirac Fermions in Pb${}_{1-x}$Sn${}_x$Se from Nernst and thermopower experiments
• Ambipolar Nernst effect in NbSe${}_2$
• Emergence of a coherent in-gap state in SmB6 Kondo insulator revealed by scanning tunneling spectroscopy
• Nernst effect and dimensionality in the quantum limit
• Magnetothermoelectric properties of Bi2Se3
• Exotic Kondo crossover in a wide temperature region in the topological Kondo insulator SmB6 revealed by high-resolution ARPES
• Nernst Effect as a Probe of Local Kondo Scattering in Heavy Fermions
• Competing topological and Kondo insulator phases on a honeycomb lattice
• Two-dimensional heavy fermions on the strongly correlated boundaries of Kondo topological insulators
• Resonant Charge Relaxation as a Likely Source of the Enhanced Thermopower in FeSi

Cited by in corpus (33)

• Quantum Oscillations of Electrical Resistivity in an Insulator
• Kondo Breakdown in Topological Kondo Insulators
• Kondo Breakdown and Quantum Oscillations in SmB${}_6$
• The vital role of hole-carriers for superconductivity in pressurized black phosphorus
• Additional energy scale in SmB${}_6$ at low temperature
• Imaging emergent heavy Dirac fermions of a topological Kondo insulator
• Quantum oscillations in flux-grown SmB6 with embedded aluminum
• Topological surface states interacting with bulk excitations in the Kondo insulator SmB${}_6$ revealed via planar tunneling spectroscopy
• Magnetic and defect probes of the SmB${}_6$ surface state
• Bulk Fermi surface of charge-neutral excitations in SmB6 or not: a heat-transport study
• Pressure-induced quantum phase transitions in topological insulator YbB6
• Consistency between ARPES and STM measurements on SmB${}_6$
• Excitonic and Nematic Instabilities on the Surface of Topological Kondo Insulators
• Definitive Surface Magnetotransport Study of SmB${}_6$
• Hall anomaly, Quantum Oscillations and Possible Lifshitz Transitions in Kondo Insulator YbB${}_{12}$: Evidence for Unconventional Charge Transport
• The Effects of Spin-Excitons on the Surface States of SmB6: A Photoemission Study
• Bulk Rotational Symmetry Breaking in Kondo Insulator SmB6
• Non-Dirac topological surface states in (SnTe)${}_{n\ge 2}$(Bi${}_2$Te${}_3$)${}_{m=1}$
• Planar tunneling spectroscopy of the topological Kondo insulator SmB${}_6$
• Chern Kondo Insulator in an Optical Lattice
• Understanding low-temperature bulk transport in samarium hexaboride without relying on in-gap bulk states
• Bulk transport paths through defects in floating zone and Al flux grown SmB${}_6$
• Giant isotropic Nernst effect in an anisotropic Kondo semimetal
• Non-universal weak antilocalization effect in cubic topological Kondo insulators
• Many-body breakdown of indirect gap in topological Kondo insulators
• From bad metal to Kondo insulator: temperature evolution of the optical properties of SmB${}_6$
• An STM perspective on hexaborides: Surface states of the Kondo insulator SmB${}_6$
• Quantum phase transition and destruction of Kondo effect in pressurized SmB6
• Vortexlike excitations in the heavy-fermion superconductor CeIrIn${}_5$
• Universal Signatures of Majorana-like Quasiparticles in Strongly Correlated Landau-Fermi Liquids
• Persistence of correlation-driven surface states in SmB6 under pressure
• Surface Conductivity in Antiferromagnetic Semiconductor CrSb${}_2$
• The role of the short range magnetic correlations on the gap opening of the topological Kondo insulators