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Topological insulator are materials formed by an insulator bulk and metallic surfaces with topological origin. These materials may be important for developments in Quantum Computing and Spintronics.
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votes
How to derive the spin-orbit term in Kane Mele model?
The spin-orbit interaction can be written:
$$
H=\mathscr{E} \hat{L} \cdot \hat{S},
$$
where $\hat{L}=\hat{r} \times \hat{p}$.
Consider an electron hopping to its next nearest neighbour on the honey …