Trions in buckled two-dimensional materials
ORAL
Abstract
We predict the formation of intravalley and intervalley controllable trions in buckled two- dimensional (2D) materials such a silicene,germanene,and stanene monolayers in an external electric field [1,2]. A study is performed within the framework of a nonrelativistic potential model using the method of hyperspherical harmonics (HH). We solve the three-body Schrödinger equation with the Rytova-Keldysh potential by expanding the wave functions of a trion in terms of the HH. Tunable by the external electric field binding energies (BE) of intravalley and intervalley trions are presented. The dependencies of the BE of trions in silicene, germanene, and stanene as a function of the electric field are qualitatively similar. BE of trions formed by A and B excitons have a non-negligible difference that increases lightly as the electric field increases. It is demonstrated that trion BE can be tuned by the external electric field, and the dielectric environment has a significant effect on the trion BE. The capability to control the BEs and compactness of trions in buckled 2D materials by an external electric field suggests a possible trions crystallization in Xenes.
- 1. R. Ya. Kezerashvili, S. M. Tsiklauri, A. Spiridonova, Phys. Rev. B 110, 035425, 2024.
2. R. Ya. Kezerashvili, S. M. Tsiklauri, and A. Spiridonova, Inter. J. Phys. Inter. J. Phys.12, 225 (2024).
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Presenters
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Roman Ya Kezerashvili
The Graduate Center, City University of New York, New York City College of Technology, The City University of New York, USA
Authors
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Roman Ya Kezerashvili
The Graduate Center, City University of New York, New York City College of Technology, The City University of New York, USA
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Shalva Tsiklauri
Borough of Manhattan Community College
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Anastasia Spiridonova
New York City College of Technology, CUNY, 1New York City College of Technology, The City University of New York, USA