Electronic correlations and Fermi liquid behavior of intermediate-band states in titanium-doped silicon
arXiv:2111.03387 · doi:10.1103/PhysRevB.104.L201201
Abstract
We study the nature of the electronic states in the intermediate band formed by interstitial titanium in silicon. Our single-site description combines effects of electronic correlations, captured by dynamical mean-field theory, and disorder, modeled using the coherent potential approximation and the typical medium mean-field theory. For all studied concentrations an extended metallic state with a strongly depleted density of states at the Fermi level is obtained. The self-energy is characteristic to Fermi-liquids and for certain temperatures reveals the existence of coherent quasi-particles.
arXiv comment6 pages, 4 figures
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