Questions tagged [exciton]
Questions about excitions.
6 questions
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Calculating excitonic optical properties with BSE level in VASP
I have been working on 2D material systems and their heterostructures. While calculating BSE excitonic optical properties in VASP, I encountered that the 2D material property is well matched with ...
3
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How is exciton binding energy calculated?
I am having some difficulties understanding values of exciton binding energies for $\ce{MoS2}$ monolayer. In various papers:
Interlayer and intralayer excitons in MoS2/WS2 and MoSe2/WSe2 ...
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8
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3
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Why can't we change the spin angular momentum of electrons with an external optical field?
I have read this paper many times: Coupled Spin and Valley Physics in Monolayers of MoS2 and Other Group-VI Dichalcogenides. Interestingly, this paper is also discussed many times in this community, ...
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How to evaluate the exciton velocity?
I have calculated the exciton wave functions using the GW-BSE method:
$$\tag{1}|S\rangle = \sum_{cv\mathbf{k}} A_{cv\mathbf{k}} |cv\mathbf{k}\rangle$$
where $c$ for conduction and $v$ for valence ...
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How to understand the spin of exciton?
In very recent years, exciton physics has been intensively explored as the emergence of 2D materials. Exciton is a bound electron-hole pair and is bosonic, namely hosting an integer spin.
My first ...
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How can I find the binding energy for exciton (optical gap) with VASP?
What is the best way to find the binding energy for exciton using VASP?
I have heard about the method of calculating it through the dielectric tensor with local ...
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