# Signature of a topological phase transition in the Josephson supercurrent through a topological insulator

@article{Orlyanchik2016SignatureOA, title={Signature of a topological phase transition in the Josephson supercurrent through a topological insulator}, author={Vladimir Orlyanchik and Martin P Stehno and Christopher D. Nugroho and Pouyan Ghaemi and Matthew Brahlek and Nikesh Koirala and Seongshik Oh and Dale J. van Harlingen}, journal={Physical Review B}, year={2016}, volume={93}, pages={035307} }

Topological insulators (TIs) hold great promise for topological quantum computation in solid-state systems. Recently, several groups reported experimental data suggesting that signatures of Majorana modes have been observed in topological insulator Josephson junctions (TIJJs). A prerequisite for the exploration of Majorana physics is to obtain a good understanding of the properties of low-energy Andreev bound states (ABSs) in a material with a topologically nontrivial band structure. Here, we…

## 24 Citations

Unconventional Josephson junctions with topological Kondo insulator weak links

- PhysicsPhysical Review B
- 2019

Proximity-induced superconductivity in three dimensional (3D) topological insulators forms a new quantum phase of matter and accommodates exotic quasiparticles such as Majorana bound states. One of…

Topological supercurrents interaction and fluctuations in the multiterminal Josephson effect

- PhysicsPhysical Review B
- 2019

We study Josephson effect in the multiterminal junction of topological superconductors. We use symmetry-constrained scattering matrix approach to derive band dispersions of emergent sub-gap Andreev…

Josephson Effect and Charge Distribution in Thin Bi2 Te3 Topological Insulators.

- Materials Science, PhysicsAdvanced materials
- 2020

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 Bi2 Te3 topological insulator films.

Transport in two-dimensional topological materials: recent developments in experiment and theory

- Physics
- 2019

We review theoretical and experimental highlights in transport in two-dimensional materials focussing on key developments over the last five years. Topological insulators are finding applications in…

Evidence for an anomalous current-phase relation in topological insulator Josephson junctions.

- Physics, MedicineNature communications
- 2015

Interferometry studies of Josephson junctions and superconducting quantum interference devices incorporating topological insulator weak links find that the nodes in single-junction diffraction patterns and SQUID oscillations are lifted and independent of chemical potential.

Kinetics of topological phase transitions and topological phases in the Josephson medium of granular high-temperature superconductors under the action of temperature, magnetic field and transport current

- Materials Science
- 2021

Abstract The paper we presented is essentially the logical conclusion of a large-scale work - from developing a strategy for detecting topological BKT phase transitions in a Josephson medium of…

Anomalous Low-Temperature Enhancement of Supercurrent in Topological-Insulator Nanoribbon Josephson Junctions: Evidence for Low-Energy Andreev Bound States.

- Physics, MedicinePhysical review letters
- 2019

We report anomalous enhancement of the critical current at low temperatures in gate-tunable Josephson junctions made from topological insulator BiSbTeSe_{2} nanoribbons with superconducting Nb…

Effect of Impurities on the Josephson Current through Helical Metals: Exploiting a Neutrino Paradigm.

- Medicine, PhysicsPhysical review letters
- 2016

The results, which are a condensed matter realization of a part of the Mikheyev-Smirnov-Wolfenstein effect for neutrinos, show that the relationship between normal state conductance and the critical current of Josephson junctions is significantly modified for Josephsonjunctions on the surface of topological insulators.

Hybrid Symmetry Epitaxy of the Superconducting Fe(Te,Se) Film on a Topological Insulator.

- Medicine, PhysicsNano letters
- 2021

It is demonstrated that Fe(Te,Se) can grow epitaxially on a TI (Bi2Te3) layer due to accidental, uniaxial lattice match, which is dubbed as "hybrid symmetry epitaxy", critical to stabilizing robust superconductivity with TC as high as 13 K.

Modeling Tunneling for the Unconventional Superconducting Proximity Effect

- Physics
- 2016

Recently there has been reinvigorated interest in the superconducting proximity effect, driven by predictions of the emergence of Majorana fermions. To help guide this search, we have developed a…

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