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Opportunity at Air Force Research Laboratory (AFRL)

Topological Surface Currents

Location

Sensors Directorate, RY/Sensors Division

RO# Location
13.35.01.C0327 Wright-Patterson AFB, OH 454337542

Advisers

Name E-mail Phone
Kiefer, Arnold Melvin arnold.kiefer@us.af.mil 937-713-8989

Description

Research opportunities are currently available for theoretical and experimental investigations of topological materials and structures. Currently, we are interested in exploring circular photogalvanic effects and surface currents in topological insulators, Weyl semimetals, and other topological phases under the influence of electrical gating and applied magnetic fields.  Understanding the control of spin-momentum locked currents will enable opto-spintronic devices for various sensing, communications, and computing applications. Facilities for conducting research include materials synthesis systems, device microfabrication tools, and sophisticated instrumentation for the characterization of the optical, electrical and magnetic properties of the materials and devices in varying magnetic fields (0-9T) and temperatures (1.6K - 300K).

References:

Yu Pan, et al.  “Helicity dependent photocurrent in electrically gated (Bi1-xSbx)2Te3 thin films” Nature Communications 8, 1037 (2018) 

J. Besbas, K. Banerjee, J. Son, Y. Wang, Y. Wu, M. Brahlek, N. Koirala, J. Moon, S. Oh and H. Yang, "Helicity-Dependent Photovoltaic Effect in Bi2Se3 Under Normal Incident Light," Advanced Optical Materials, vol. 4, pp. 1642-1650, 2016.

S. Luo, L. He and M. Li, "Spin-momentum locked interaction between guided photons and surface electrons in topological insulators," Nature Communications, vol. 8, p. 2141, 15 Dec 2017.

Keywords:
Topological materials; Topological insulators; Weyl semimetals; Circular photogalvanic effect; Surface currents; Spin-momentum locking; Topological states; Quantum Hall insulators; Spintronics

Eligibility

Citizenship:  Open to U.S. citizens
Level:  Open to Postdoctoral and Senior applicants

Stipend

Base Stipend Travel Allotment Supplementation
$76,542.00 $4,000.00

$3,000 Supplement for Doctorates in Engineering & Computer Science

Experience Supplement:
Postdoctoral and Senior Associates will receive an appropriately higher stipend based on the number of years of experience past their PhD.

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