Biexcitons in monolayer transition metal dichalcogenides tuned by magnetic fields

Christopher. E. Stevens, Jagannath Paul, Timothy Cox, Prasana K. Sahoo, Humberto R. Gutiérrez, Volodymyr Turkowski, Dimitry Semenov, Steven A. McGill, Myron D. Kapetanakis, Ilias E. Perakis, David J. Hilton and Denis Karaiskaj ()
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Christopher. E. Stevens: University of South Florida
Jagannath Paul: University of South Florida
Timothy Cox: University of South Florida
Prasana K. Sahoo: University of South Florida
Humberto R. Gutiérrez: University of South Florida
Volodymyr Turkowski: University of Central Florida
Dimitry Semenov: Florida State University
Steven A. McGill: Florida State University
Myron D. Kapetanakis: University of Alabama at Birmingham
Ilias E. Perakis: University of Alabama at Birmingham
David J. Hilton: University of Alabama at Birmingham
Denis Karaiskaj: University of South Florida

Nature Communications, 2018, vol. 9, issue 1, 1-7

Abstract: Abstract We present time-integrated four-wave mixing measurements on monolayer MoSe2 in magnetic fields up to 25 T. The experimental data together with time-dependent density function theory calculations provide interesting insights into the biexciton formation and dynamics. In the presence of magnetic fields the coherence at negative and positive time delays is dominated by intervalley biexcitons. We demonstrate that magnetic fields can serve as a control to enhance the biexciton formation and help search for more exotic states of matter, including the creation of multiple exciton complexes and excitonic condensates.

Date: 2018
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DOI: 10.1038/s41467-018-05643-1

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