Anomalous Conductance Oscillations in the Hybridization Gap of InAs/GaSb Quantum Wells

Abstract

We observe the magnetic oscillation of electric conductance in the two-dimensional InAs/GaSb quantum spin Hall insulator. Its insulating bulk origin is unambiguously demonstrated by the antiphase oscillations of the conductance and the resistance. Characteristically, the in-gap oscillation frequency is higher than the Shubnikov-de Haas oscillation close to the conduction band edge in the metallic regime. The temperature dependence shows both thermal activation and smearing effects, which cannot be described by the Lifshitz-Kosevich theory. A two-band Bernevig-Hughes-Zhang model with a large quasiparticle self-energy in the insulating regime is proposed to capture the main properties of the in-gap oscillations.

arXiv comment26 pages, 11 figures

References in corpus (31)

• Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
• Evidence for Helical Edge Modes in Inverted InAs/GaSb Quantum Wells
• Quantum Spin Hall Effect in Inverted Type II Semiconductors
• Observation of Quantum Spin Hall States in InAs/GaSb Bilayers under Broken Time-Reversal Symmetry
• Quantum oscillations in Kondo Insulator SmB${}_6$
• Unconventional Fermi surface in an insulating state
• Quantum Oscillation from In-gap States and non-Hermitian Landau Level Problem
• Gate-Tuned Spontaneous Exciton Insulator in Double-Quantum Wells
• Quantum Oscillations of Electrical Resistivity in an Insulator
• Quantum oscillations without a Fermi surface and the anomalous de Haas-van Alphen effect
• Fermi surface in the absence of a Fermi liquid in the Kondo insulator SmB${}_6$
• Quantum oscillation in narrow-gap topological insulators
• Kondo Breakdown and Quantum Oscillations in SmB${}_6$
• Excitons in topological Kondo insulators - theory of thermodynamic and transport anomalies in SmB${}_6$
• Interplay of exciton condensation and quantum spin Hall effect in InAs/GaSb bilayers
• Mixed-valence insulators with neutral Fermi surfaces
• Excitonic instability and electric-field-induced phase transition towards a two dimensional exciton condensate
• Skyrme insulators: insulators at the brink of superconductivity
• Quantum oscillations in insulators with neutral Fermi surfaces
• Tuning Edge States in Strained-Layer InAs/GaInSb Quantum Spin Hall Insulators
• Insulating state and giant non-local response in an InAs/GaSb quantum well in the quantum Hall regime
• Fermi surfaces in Kondo insulators
• Chemical potential asymmetry and quantum oscillations in insulators
• The Anomalous de Haas-van Alphen Effect in InAs/GaSb quantum wells
• Bulk Fermi surface of charge-neutral excitations in SmB6 or not: a heat-transport study
• Anomalous Quantum Oscillations of Interacting Electron-hole Gases in Inverted Type-II InAs/GaSb Quantum Wells
• Metal-Insulator oscillations in a Two-dimensional Electron-Hole system
• Low-Temperature Conductivity of Weakly Interacting Quantum Spin Hall Edges in Strained-Layer InAs/GaInSb
• Field-dependent heat transport in the Kondo insulator SmB6 : phonons scattered by magnetic impurities
• A highly asymmetric nodal semimetal in bulk SmB6
• Effective g-factors of carriers in inverted InAs/GaSb bilayers

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