Electronic correlations and Fermi liquid behavior of intermediate-band states in titanium-doped silicon

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.

6 pages, 4 figures

References in corpus (5)

• Half-metallic ferromagnets: From band structure to many-body effects
• Non-Drude universal scaling laws for the optical response of local Fermi liquids
• One particle spectral function and analytic continuation for many-body implementation in the EMTO method
• Analytic continuation-free Green's function approach to correlated electronic structure calculations
• Ab initio typical medium theory of substitutional disorder