Questions tagged [exciton]

Questions about excitions.

Filter by
Sorted by
Tagged with
11
votes
1answer
460 views

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 ...
8
votes
3answers
528 views

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, ...
8
votes
1answer
172 views

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 ...
8
votes
1answer
84 views

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 ...