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Tight binding models for high temperature superconductors
This page lists a set of tightbinding 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 tightbinding file contains lines with the following format:
r_{x}, r_{y}, r_{z}, a, b, Re(t), Im(t)
Here r_{i} is the ith 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 H_{ab}.

Models
 Directory up   ./Sr2RuO4_surface  DFT derived tight binding model for Sr2RuO4 from a surface calculation   ./Sr2RuO4_surface/nematic_2SL  Tight binding model for Sr2RuO4 from an abinitio calculation of the reconstructed surface including oxygen octahedra rotation, complemented by a surface nematic term and terms from (onsite) spinorbit coupling   ./FeSC_daghofer    ./Sr2RuO4_SRH  simple tight binding model for Sr2RuO4 in units of NN hopping   ./Sr2RuO4_CAEA  tight binding model for Sr2RuO4 from fit to ARPES data   ./Sr2RuO4_3D  DFT derived tight binding model for Sr2RuO4 including interlayer hopping terms 
