Weak-link Josephson Junctions Made from Topological Crystalline Insulators

Topological crystalline insulators.

The recent discovery of topological insulators has revived interest in the band topology of insulators. In this Letter, we extend the topological classification of band structures to include certain crystal point group symmetry. We find a class of three-dimensional "topological crystalline insulators" which have metallic surface states with quadratic band degeneracy on high symmetry crystal sur...

Layered Topological Crystalline Insulators.

Topological crystalline insulators (TCIs) are insulating materials whose topological property relies on generic crystalline symmetries. Based on first-principles calculations, we study a three-dimensional (3D) crystal constructed by stacking two-dimensional TCI layers. Depending on the interlayer interaction, the layered crystal can realize diverse 3D topological phases characterized by two mir...

Topological Josephson φ0 junctions

Topological Crystalline Insulators and Topological Superconductors: From Concepts to Materials

In this review, we discuss recent progress in the explorations of topological materials beyond topological insulators; specifically, we focus on topological crystalline insulators and bulk topological superconductors. The basic concepts, model Hamiltonians, and novel electronic properties of these new topological materials are explained. The key role of symmetries that underlie their topologica...

Signatures of topological Josephson junctions

Yang Peng,1 Falko Pientka,1,2 Erez Berg,3 Yuval Oreg,3 and Felix von Oppen1 1Dahlem Center for Complex Quantum Systems and Fachbereich Physik, Freie Universität Berlin, 14195 Berlin, Germany 2Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA 3Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot, Israel (Received 3 May 2016; revised manuscri...