Naslov
Ubiquity of linear resistivity at intermediate temperature in bad metals

Autori
Boyd, G.R. ; Zlatić, Veljko ; Freericks, J.K.

Izvornik
Physical review. B, Condensed matter and materials physics (1098-0121) 91 (2015); 07518-07523

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
bad metals, linear resistivity

Sažetak
Bad metals display transport behavior that differs from what is commonly seen in ordinary metals. One of the most significant differences is a resistivity that is linear in temperature and rises to well above the Ioffe-Regel limit (where the mean-free path is equal to the lattice spacing). Using an exact Kubo formula, we show that a linear resistivity naturally occurs for many systems when they are in an incoherent intermediate-temperature state. First, we provide a simple analytic model to give intuition for this phenomenology. Then, we verify the analytic arguments with numerical calculations for a simplified version of the Hubbard model which is solved with dynamical mean-field theory. Similar features have also been seen in Hubbard models, where they can begin at even lower temperatures due to the formation of resilient quasiparticles.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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