[Wannier] Interpretation of wannier90.up_hr.dat

[Alexandra Shuman]

Dear all,

I understand that you one obtain tight binding parameters from wannier90 by
inspecting the elements of the Hamiltonian in the wannier basis. I am
getting positive and negative values for these elements.

Is there a physical interpretation for positive and negative values for the
hopping parameters?

Thanks,
Lexa
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