Famous non-Fermi liquid-like behaviors of the transport phenomena in high-Tc
cuprates (Hall coefficient, magnetoresistance, thermoelectric power, Nernst
coefficient, etc) are caused by the current vertex corrections in neary
antiferromagnetic (AF) Fermi liquid, which was called the backflow by Landau.
We present a simple explaination why the backflow is prominent in strongly
correlated systems. In nearly AF Fermi liquid, R_H is enhanced by the backflow
because it changes the effective curvature of the Fermi surfaces. Therefore,
the relaxation time approximation is not appricalbe to a system near a magnetic
quantum critical point (QCP).Comment: 2 pages, submitted to proceedings of LT24, Figure 1 has been change
