Combined ARPES and DFT+eDMFT investigation on the effects of strain & doping in Fe(Se,Te) systems.*

Recently, the effect of doping in the Fe(Se,Te) systems has been a point of interest in the literature as Fe(Se,Te) system can potentially exhibit topological superconductivity at relatively high temperatures. We use a combination of molecular beam epitaxial (MBE) growth, time and angle-resolved-photoemission-spectroscopy (trARPES), and ab initio embedded dynamical mean-field theory (eDMFT) to understand the correlated electronic and vibrational properties of Fe(Se,Te) systems under the applied in-plane strain. Using eDMFT, we compute structural parameters for various FeSe_xTe_{1-x} systems including the chalcogen heights and important phonon frequencies. eDMFT computed orbital-resolved spectral functions are found to be in excellent agreement with the ARPES data.