Bad metals are characterized by a peculiar electrical resistivity that increases with decreasing temperature, in contrast to the usual metallic behavior where resistivity decreases with decreasing temperature. This anomalous behavior is attributed to the strong interactions between electrons and their tendency to form localized states.
In bad metals, supertransport occurs when the electrons are subjected to a strong electric field. This field induces a rearrangement of the electronic states, leading to the formation of coherent, high-mobility charge carriers. These charge carriers, known as "Cooper pairs," can transport current with minimal resistance.
The mechanism underlying supertransport in bad metals is still not fully understood, but several theoretical models have been proposed to explain this phenomenon. One prominent explanation involves the formation of a charge-density wave (CDW) - a periodic modulation of the electron density. The CDW creates a potential landscape that allows electrons to move with reduced scattering, resulting in enhanced current flow.
Another proposed mechanism for supertransport in bad metals involves the formation of "spin-charge-separated" states. In these states, the spins and charges of electrons become effectively separated, leading to a reduction in scattering and increased current transport.
The observation of supertransport in bad metals has opened up new avenues for research in condensed matter physics and materials science. It challenges conventional theories of electron transport and holds promise for the development of novel electronic devices with enhanced performance.
In summary, supertransport in bad metals is a remarkable phenomenon where electrons exhibit anomalously high current-carrying capacity under specific conditions. This behavior is attributed to the strong interactions between electrons and their tendency to form localized states. The mechanisms underlying supertransport are still being actively studied and understood, and this research area holds great potential for advancing our knowledge of condensed matter physics and its technological applications.
