(University of California at Santa Cruz)
Resistivity from the extremely correlated Fermi liquid theory
The extremely correlated Fermi liquid theory has recently
provided a set of promising results for the t-J model in 1-2 and
infinite dimensions. I will present the results for the resistivity in
infinite dimensions and in the experimentally relevant 2 dimensional
case, where one finds an astonishingly small Fermi liquid
temperature. The resistivity versus T above this scale can be convex or
concave depending on band parameters.
Results for the the cotangent Hall angle are displayed. At lowest
T it shows a T^2 behavior. Upon warming it displays a
downward bend (or kink), signifying a crossover from a Fermi
liquid regime to a strange metal regime. This feature has been
experimentally seen in many correlated systems, but has
apparently evaded comment or discussion so far.