Exciton fine structure and spin decoherence in monolayers of transition metal dichalcogenides - INSA Toulouse - Institut National des Sciences Appliquées de Toulouse Access content directly
Journal Articles Physical Review B: Condensed Matter and Materials Physics (1998-2015) Year : 2014

Exciton fine structure and spin decoherence in monolayers of transition metal dichalcogenides

Abstract

We study the neutral exciton energy spectrum fine structure and its spin dephasing in transition metal dichalcogenides such as MoS2. The interaction of the mechanical exciton with its macroscopic longitudinal electric field is taken into account. The splitting between the longitudinal and transverse excitons is calculated by means of the both electrodynamical approach and k⋅p perturbation theory. This long-range exciton exchange interaction can induce valley polarization decay. The estimated exciton spin dephasing time is in the picosecond range, in agreement with available experimental data.
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Dates and versions

hal-02050943 , version 1 (27-02-2019)

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  • HAL Id : hal-02050943 , version 1

Cite

M. Glazov, Thierry Amand, Xavier Marie, David Lagarde, Louis Bouet, et al.. Exciton fine structure and spin decoherence in monolayers of transition metal dichalcogenides. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2014, 89 (20). ⟨hal-02050943⟩
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