Topological superconductivity in semiconductor–superconductor–magnetic-insulator heterostructures

Topological Superconductivity in Artificial Heterostructures

Vortex lines in topological insulator-superconductor heterostructures

Ching-Kai Chiu,1 Matthew J. Gilbert,2,3 and Taylor L. Hughes1 1Department of Physics, University of Illinois, 1110 West Green Street, Urbana, Illinois 61801, USA 2Department of Electrical and Computer Engineering, University of Illinois, 1406 West Green Street, Urbana, Illinois 61801, USA 3Micro and Nanotechnology Laboratory, University of Illinois, 208 North Wright Street, Urbana, Illinois 618...

Proximity effect in graphene-topological-insulator heterostructures.

We formulate a continuum model to study the low-energy electronic structure of heterostructures formed by graphene on a strong three-dimensional topological insulator (TI) for the cases of both commensurate and incommensurate stacking. The incommensurability can be due to a twist angle between graphene and the TI surface or a lattice mismatch between the two systems. We find that the proximity ...

Large anomalous Hall effect in ferromagnetic insulator-topological insulator heterostructures

heterostructures L. D. Alegria, H. Ji, N. Yao, J. J. Clarke, R. J. Cava, and J. R. Petta Department of Physics, Princeton University, Princeton, New Jersey 08544, USA Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA Princeton Institute for the Science and Technology of Materials, Princeton University, Princeton, New Jersey 08544, USA Hitachi High Technologies Amer...

Unconventional superconductivity on a topological insulator.

We study proximity-induced superconductivity on the surface of a topological insulator (TI), focusing on unconventional pairing. We find that the excitation spectrum becomes gapless for any spin-triplet pairing, such that both subgap bound states and Andreev reflection is strongly suppressed. For spin-singlet pairing, the zero-energy surface state in the d(xy)-wave case becomes a Majorana fermi...