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Tight binding models for high temperature superconductors
This page lists a set of tight-binding models that are suitable to describe high temperature superconductors
Some of the models have been compiled from the literature for comparison, others are calculated using first principles calculations or adjusted to match experimental measured quantities.
For each model, the hopping parameters are given in a comma separated file (csv), and basic plots of the band structure and Fermi surface are provided for comparison.
The tight-binding file contains lines with the following format:
rx, ry, rz, a, b, Re(t), Im(t)
Here ri is the i-th component of the real space vector that describes the hopping process, a and b are integer numbers labeling the orbitals and the last two entries are the real and imaginary part of the hopping (usually given in eV).
The corresponding Bloch Hamiltonian (in orbital representation) can be obtained by a Fourier transform and summation over all lines to yield the matrix Hab.
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Models
| Directory up | | ./nematic_2SL | Tight binding model for Sr2RuO4 from an ab-initio calculation of the reconstructed surface including oxygen octahedra rotation, complemented by a surface nematic term and terms from (on-site) spin-orbit coupling |
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Tight binding model for Sr2RuO4 surface without any effect of surface reconstruction, but in a 2 sublattice setting.
Also discussed in
A. Kreisel, C. A. Marques, L. C. Rhodes, X. Kong, T. Berlijn, R. Fittipaldi, V. Granata, A. Vecchione, P. Wahl, P. J. Hirschfeld
arXiv:2103.06188
Unveiling the missing band: Quasiparticle Interference of the γ-band in Sr2RuO4
to contrast the insufficient description of the experimental findings by using this model.
Please cite the reference when using this resources.
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