Josephson Effect and Charge Distribution in Thin Bi<sub>2</sub> Te<sub>3</sub> Topological Insulators.
basic_science · Level V
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- Record sourced from PubMed, PMID 32091158.
- Also identified by DOI 10.1002/adma.201908351.
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Abstract
Thin layers of topological insulator materials are quasi-2D 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, the Josephson effect, magnetotransport, and weak anti-localization are studied in bottom-gated thin Bi<sub>2</sub> Te<sub>3</sub> topological insulator films. The experimental carrier densities are compared to a model based on the solutions of the self-consistent Schrödinger-Poisson equations and they are in 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.