• Zhigang Jiang Research Group, Boggs Building, 770 State Street, Atlanta, Georgia 30332 U.S.A. (Laboratory Phone): 404-385-8642

Research Areas

The current ongoing projects include: (1) infrared magneto-spectroscopy of graphene, (2) spin transport in side-wall epitaxial graphene nanoribbons, and (3) point-contact Andreev reflection spectroscopy of topological materials

Area 1:

Infrared magneto-spectroscopy of graphene

Infrared spectroscopy is a powerful tool in exploring the physics of novel materials. It covers a range of techniques dealing with the infrared region of electromagnetic spectrum. In this program, we apply these techniques to study graphene and related materials in high magnetic fields up to 35 T, with emphasis on interaction induced effects such as magneto-excitons, magneto-plasmons, and magento-phonon resonance. Our expertise is in investigating mesoscopic sized metallic/semiconducting devices in the quantum limit.

Area 2:

Spin transport in side-wall epitaxial graphene nanoribbons

We are interested in tunnel magnetoresistance (TMR) measurements of magnetic tunnel junctions consisting of ferromagnetic material cobalt, aluminum oxide barrier, and side-wall epitaxial graphene nanoribbons. The goals of this program are to demonstrate side-wall graphene nanoribbons are magnetic with a spin component either parallel or antiparallel to the magnetization direction of the cobalt, and to understand the underlying mechanism that polarizes the electron spins in the ribbon.

Area 3:

Point-contact Andreev reflection spectroscopy of topological materials

Topological materials have drawn substantial attention lately, owing to the recent research interest in topological order and its possible application to quantum computing. Theory predicts that it hosts a rich variety of intriguing phenomena ranging from anomalous Hall effect, magnetic monopole, magnetoelectric effects, to Majorana fermions. In this program, we apply the point-contact Andreev reflection spectroscopy technique to investigate the unconventional superconductivity of topological superconductors and the proximity-induced superconductivity on the surface/edge of topological insulators.