Second Tech code package This code package accompanies blog posts published on second-tech.com. Folder Blog post 2018_10_23 Using TBTK to calculate the density of states (DOS) of a 1D, 2D, and 3D square lattice 2018_10_27 Direct access to wave function amplitudes and eigenvalues in TBTK 2018_11_01 Creating Models with complex geometries using an IndexFilter in TBTK 2018_11_04 Retrieving the Hamiltonian from the Model in TBTK 2018_11_07 Dynamically adjustable HoppingAmplitudes using callback functions in TBTK 2019_07_05 The graphene band structure Contact: kristofer.bjornson@second-tech.com