Josephson Effect and Charge Distribution in Thin Bi${}_2$Te${}_3$ Topological Insulators

Abstract

Thin layers of topological insulator materials are quasi-two-dimensional systems featuring a complex interplay between quantum confinement and topological band structure. To understand the role of the spatial distribution of carriers in electrical transport, we study the Josephson effect, magnetotransport, and weak anti-localization in bottom-gated thin Bi${}_2$Te${}_3$ topological insulator films.We compare the experimental carrier densities to a model based on the solutions of the self-consistent Schrödinger-Poisson equations and find excellent agreement. The modeling allows for a quantitative interpretation of the weak antilocalization correction to the conduction and of the critical current of Josephson junctions with weak links made from such films without any ad hoc assumptions.

arXiv comment18 pages, 6 figures

References in corpus (30)

• Non-Abelian Anyons and Topological Quantum Computation
• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• Topological Insulators with Inversion Symmetry
• Oscillatory crossover from two dimensional to three dimensional topological insulators
• Manipulation of Majorana fermion, Andreev reflection and Josephson current on topological insulators
• Coexistence of the topological state and a two-dimensional electron gas on the surface of Bi2Se3
• Large tuneable Rashba spin splitting of a two-dimensional electron gas in Bi2Se3
• $4\pi$-periodic Josephson supercurrent in HgTe-based topological Josephson junctions
• Thickness-independent transport channels in topological insulator Bi2Se3 thin films
• The Josephson critical current in a long mesoscopic S-N-S junction
• Gapless Andreev bound states in the quantum spin Hall insulator HgTe
• Emergent quantum confinement at topological insulator surfaces
• Engineering a p+ip Superconductor: Comparison of Topological Insulator and Rashba Spin-Orbit Coupled Materials
• Persistence of Topological Order and Formation of Quantum Well States in Topological Insulators Bi2(Se,Te)3 under Ambient Conditions
• Weak Localization and Antilocalization in Topological Insulator Thin Films with Coherent Bulk-Surface Coupling
• Transport Properties of Topological Insulators: Band Bending, Bulk Metal-to-Insulator Transition, and Weak Anti-Localization
• Intrinsic conduction through topological surface states of insulating Bi${}_2$Te${}_3$ epitaxial thin films
• Coherent low-energy charge transport in a diffusive S-N-S junction
• Induced unconventional superconductivity on the surface states of Bi${}_2$Te${}_3$ topological insulator
• Quantum interference of edge supercurrents in a two-dimensional topological insulator
• Supercurrent in a mesoscopic proximity wire
• In-situ spectroscopy of intrinsic Bi2Te3 topological insulator thin films and impact of extrinsic defects
• Signature of a topological phase transition in the Josephson supercurrent through a topological insulator
• Gate-tunable transport properties of in-situ capped Bi${}_2$Te${}_3$ topological insulator thin films
• Full range of proximity effect probed with Superconductor/Graphene/Superconductor junctions
• Critical current scaling in long diffusive graphene-based Josephson junctions
• Dirac cone shift of a passivated topological Bi2Se3 interface state
• Bulk contribution to magnetotransport properties of low defect-density Bi${}_2$Te${}_3$ topological insulator thin films
• Quantum decay of the supercurrent and intrinsic capacitance of Josephson junctions beyond the tunnel limit
• Determination of the Anisotropy of Permittivity of Quantum Paraelectric Strontium Titanate

Cited by in corpus (6)

• Field-Effect Josephson Diode via Asymmetric Spin-Momentum-Locking States
• Topological insulator nanoribbon Josephson junctions: evidence for size effect in transport properties
• Quantum Transport and Potential of Topological States for Thermoelectricity in Bi${}_2$Te${}_3$ Thin Films
• Gate-induced decoupling of surface and bulk state properties in selectively-deposited Bi${}_2$Te${}_3$ nanoribbons
• Gate Tunable Supercurrent in Josephson Junctions Based on Bi2Te3 Topological Insulator Thin Films
• Gate-Tunable Ambipolar Josephson Current in a Topological Insulator