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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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./Sr2RuO4_surfaceDFT derived tight binding model for Sr2RuO4 from a surface calculation
./Sr2RuO4_surface/nematic_2SLTight 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
./Sr2RuO4_SRHsimple tight binding model for Sr2RuO4 in units of NN hopping
./Sr2RuO4_CAEAtight binding model for Sr2RuO4 from fit to ARPES data
./Sr2RuO4_3DDFT derived tight binding model for Sr2RuO4 including interlayer hopping terms