Trapping of Interlayer Excitons in MoSe2-WSe2 Heterostructures
ORAL
Abstract
MoSe2-WSe2 heterostructures are known to host long lived spatially indirect interlayer excitons composed of bound electron and hole pairs that are located in different layers. Recently there has been significant interest in spatially controlling interlayer excitons via externally applied electric fields to demonstrate excitonic currents and trapping interlayer excitons via moiré superlattices. In this presentation, I will discuss how to use patterned graphene gates in close proximity to the heterostructure to create a spatially varying electric field within the vicinity of the interlayer exciton. The interaction between permanent dipole moment of the interlayer exciton and the electric field creates a spatial potential energy trap for the excitons, which is controlled by the geometry of the patterned graphene gate as well as the externally applied voltage. I will show that these trapped interlayer excitons can be identified through spatially resolved photoluminescence imaging and gate-dependent spectroscopy. Finally, I will discuss potential applications of the trapped interlayer excitons to quantum information science applications.
*Plasmatherm reactive ion etcher: NSF MRI grant, award no. ECCS1725571
Funding from NSF Grants: ECCS-1708562, DMR-1838378, and DMR-2003583.
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Presenters
Daniel N. Shanks
Department of Physics, University of Arizona
Authors
Daniel N. Shanks
Department of Physics, University of Arizona
Michael R Koehler
JIAM Diffraction Facility, Joint Institue for Advanced Materials, University of Tennessee
Joint Institute for Advanced Materials Diffraction Facility, University of Tennessee
The University of Tennessee
David George Mandrus
Materials Science and Technology Division, Oak Ridge National Labratory
Materials Science and Engineering, University of Tennessee
Department of Materials Science and Engineering, University of Tennessee
University of Tennessee
Department of Materials Science and Engineering, University of Tennessee Knoxville
Department of Materials Science & Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA
Oakridge National Laboratory
Materials Science and Engineering, University of Tennessee, Knoxville
Oak Ridge National Laboratory
University of Tennessee - Knoxville
Materials Science and Technology Division, Oak Ridge National Laboratory
Department of Physics, University of Tennessee Knoxville
Materials Science and Technology, Oak Ridge National Laboratory
Oak Ridge National Laboratory, Materials Science and Technology Division
Department of Materials Science, The University of Tennessee
University of Tennessee, Knoxville
Takashi Taniguchi
National Institute for Materials Science, Japan
National Institute for Materials Science
Department of Chemical Engineering, Kyoto University
National Institute for Materials Science, Tsukuba, Ibaraki, Japan
International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
Materials, NIMS
International Center for Materials Anorthite, National Institute for Materials Science, Ibaraki, Japan
Kyoto University
Kenji Watanabe
National Institute for Materials Science
National Institute for Materials Science, Japan
National Institure for Materials Science
Advanced Materials Laboratory, National Institute for Materials Science
NIMS
National Institute of Materials Science
National Institute for Materials Science (NIMS)
Research Center for Functional Materials, National Institute for Materials Science
National Institute for Materials Science,1-1 Namiki
National Institute of Material Science
National Institute for Materials Science, Tsukuba, Japan
Research Center for Functional Materials, NIMS
National Institute of Materials Science, Tsukuba, Japan
National Institude for Materials Science
National Institute for Materials Science, Tsukuba, Ibaraki, Japan
Research Center for Functional Materials, National Institute for Materials Science, Tsukuba 305-0044, Japan
International Center for Materials Nanoarchitectonics, National Institute for Materials
NIMS - Japan
National Institute for Materials Science ,Japan
National Institute for Materials Science, Tsukuba, 305-0044, Ibaraki, Japan
National Institute for Material Science
National Institute for Material Science, 1-1 Namiki, Tsukuba 305-0044, Japan
National Institute for Material Science Japan
NIMS Tsukuba
National Institute for Materials Science, Research Center for Functional Materials, Japan
Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
National Institute for Materials Science: Namiki, Tsukuba, Ibaraki, JP
National Institue for Material Science
National Institute for Materials Science,1-1 Namiki, Tsukuba, 305-0044, Japan
Materials, NIMS
Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan, Research Center for Functional Materials, National In
Research Center for Functional Materials, Japan
International Center for Materials Nanoarchitectonics, National Institute for Materials Science
International Center for Materials nanoarchtectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba, 305-0044, Japan
NIMS Suguba
NIMS, Tsukuba, Japan
National Institute for Materials Science, Namiki 1-1, Tsukuba, 305-0044, Ibaraki, Japan
National institute of material science
Advanced Materials Laboratory, National Institute for Materials Science, 1-1 Namiki, Tsukuba, 305-0044, Japan
Advanced Materials Laboratory, NIMS
Research Center for Functional Materials, National Institute for Materials Science, Ibaraki, Japan
National Institute for Materials Science, Research Center for Functional Materials
