Dynamic modulation of phonon-assisted transitions in quantum defects in monolayer transition-metal dichalcogenide semiconductors

• URL: http://arxiv.org/abs/2007.14399v1
• Date: Tue, 28 Jul 2020 18:00:00 GMT
• Title: Dynamic modulation of phonon-assisted transitions in quantum defects in monolayer transition-metal dichalcogenide semiconductors
• Authors: Chitraleema Chakraborty, Christopher J. Ciccarino and Prineha Narang
• Abstract summary: We study the effect of spin-orbit coupling on the electron-phonon interaction in a single chalcogen vacancy defect. We find that spin-orbit tune the magnitude of the electron-phonon coupling in both optical and charge-state transitions of the defect.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Quantum localization via atomic point defects in semiconductors is of significant fundamental and technological importance. Quantum defects in monolayer transition-metal dichalcogenide semiconductors have been proposed as stable and scalable optically-addressable spin qubits. Yet, the impact of strong spin-orbit coupling on their dynamical response, for example under optical excitation, has remained elusive. In this context, we study the effect of spin-orbit coupling on the electron-phonon interaction in a single chalcogen vacancy defect in monolayer transition metal dichalcogenides, molybdenum disulfide (MoS$_2$) and tungsten disulfide (WS$_2$). From ab initio electronic structure theory calculations, we find that spin-orbit interactions tune the magnitude of the electron-phonon coupling in both optical and charge-state transitions of the defect, modulating their respective efficiencies. This observation opens up a promising scheme of dynamically modulating material properties to tune the local behavior of a quantum defect.

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