Synopsis: Odd topological superconductor

Experiments indicate that electrons pair in a spin-triplet state in the superconducting state of the topological insulator CuxBi2Se3.
Synopsis figure
Credit: Carin Cain

Bismuth selenide (Bi2Se3), a typical topological insulator, recently turned superconductor after careful intercalation of copper between the BiSe layers that make up this material. Apart from questions regarding how the material achieves superconductivity, the nature of the latter and its relation to the topological insulator state are attracting much interest.

Now, in an article published as a Rapid Communication in Physical Review B, Pradip Das and collaborators from the University of Tsukuba in Japan study the superconducting version of Bi2Se3 using magnetization measurements. The researchers find differences in the behavior of vortices from what is found in usual type-II superconductors. They conclude that their observations are consistent with odd-parity pairing and that the paired electrons form a spin-triplet state driven by strong spin-orbit interactions in the material, which is in agreement with recent theoretical predictions. – Alex Klironomos


Features

More Features »

Announcements

More Announcements »

Subject Areas

Superconductivity

Previous Synopsis

Atomic and Molecular Physics

Atoms down the tube

Read More »

Next Synopsis

Atomic and Molecular Physics

Repelling atoms reach quantum unison more easily

Read More »

Related Articles

Synopsis: Graphene Helps Catch Light Quanta
Graphene

Synopsis: Graphene Helps Catch Light Quanta

The use of graphene in a single-photon detector makes it dramatically more sensitive to low-frequency light. Read More »

Viewpoint: A Roadmap for a Scalable Topological Quantum Computer
Condensed Matter Physics

Viewpoint: A Roadmap for a Scalable Topological Quantum Computer

A team of experimentalists and theorists proposes a scalable protocol for quantum computation based on topological superconductors. Read More »

Synopsis: Superconductivity Model Misses Its Target
Superconductivity

Synopsis: Superconductivity Model Misses Its Target

Researchers have added dopant atoms to a quantum spin liquid in an effort to make it superconduct, but the material upended theory by remaining an insulator. Read More »

More Articles