Regensburg 2019 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

MM: Fachverband Metall- und Materialphysik

MM 25: Transport (Diffusion, conductivity, heat)

MM 25.4: Vortrag

Mittwoch, 3. April 2019, 11:00–11:15, H46

Spectral and transport properties of disordered Mott systems — •Himadri Barman — Department of Physics, Zhejiang University, 38 Zheda Road, Hangzhou, Zhejiang 230027, China — Institute of Mathematical Sciences, 4th Cross, CIT Campus, Taramani, Chennai, Tamil Nadu 600113, India

We study the disordered Hubbard model within the dynamical mean-field theory (DMFT) framework using the coherent potential approximation (CPA). Despite similar studies have been performed in the earlier literature, for the first time, we looked at the finite temperature longitudinal and transverse (Hall) conductivity and discovered two different scattering rates: one following the Fermi-liquid's quadratic temperature (T) dependence and the other showing a non-Fermi-liquid like power-law behavior. Thus our theoretical results show that the interplay of disorder and Coulomb interaction may possess the answers to the long-standing unresolved problem of the two-scattering rates discovered in the cuprates, and subsequently in the bulk correlated oxide materials.