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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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3 band model for Sr2RuO4 fitted to ARPES data, but excluding the spin-orbit coupling effects. Taken from
a Sergio Cobo, Felix Ahn, Ilya Eremin, and Alireza Akbari Phys. Rev. B 94, 224507 (2016)
Anisotropic spin fluctuations in Sr2RuO4: role of spin-orbit coupling and induced strain

Originally discussed in V. B. Zabolotnyy, D. V. Evtushinsky, A. A. Kordyuk, T. K. Kim, E. Carleschi, B. P. Doyle, R. Fittipaldi,M. Cuoco, A. Vecchione, and S. V. Borisenko, J. Electron Spectrosc. Relat. Phenom. 191,48 (2013). Renormalized band structure of Sr2RuO4: A quasiparticle tight-binding approach
If you use the data provided here, please cite the original work that published the tight binding parameters:

Download model and figures: Sr2RuO4_CAEA.tar.gz