16 votes
Accepted

Berry's curvature and magnetic moment in TMDCs

The Berry curvature is defined as: $$ \Omega_{\mu\nu}(\mathbf{k})=\partial_{\mu}A_{\nu}(\mathbf{k})-\partial_{\nu}A_{\mu}(\mathbf{k}), \tag{1} $$ where $A_{\mu}(\mathbf{k})=\langle u_{\mathbf{k}}|i\...
ProfM's user avatar
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12 votes

Berry's curvature and magnetic moment in TMDCs

Resolution for the time reversal symmetry: I need to demonstrate: $\Omega(-\mathbf{k})=-\Omega(\mathbf{k})$ (Berry's curvature is a odd function under time reversal symmetry) Berry's curvature: $$\...
Carmen González's user avatar
7 votes
Accepted

Separation of valence bands in transition metal dichalcogenides (TMDs)

I should start by saying that I am no expert in MoS$_2$, so this answer is my guess from looking at the reference you provide, and would be happy if someone corrects me. The general things to keep in ...
ProfM's user avatar
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4 votes
Accepted

Tools for Valleytronic Research

Whenever I hear spintronics, valleytronics, twistronics or anything that really breaks down to the study of quantum transport, I always think of the people who taught me Quantum Mechanics and work in ...
epalos's user avatar
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3 votes

Valleys and time reversal symmetry (Zeeman effect)

First of all, H-phase TMDC monolayers like $\ce{WSe_2}$ are non-magnetic semiconducting materials, which means the time-reversal symmetry (TRS) is preserved. Therefore, you can say the energy states ...
Jack's user avatar
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2 votes

Separation of valence bands in transition metal dichalcogenides (TMDs)

ProfM's argument is absolutely right. Here I support a more detailed explanation based on first-principles calculations. The spin-resolved band structure of monolayer MoS$_2$ with the consideration of ...
Jack's user avatar
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