Paper detail

Hall helps Ohm: some corrections to negative-U centers approach to transport properties of YBa$_2$Cu$_3$O$_x$ and La$_{2-x}$Sr$_x$CuO$_4$

For broad oxygen and strontium doping ranges, temperature dependences (T-dependences) of the normal state resistivity ρ(T) of YBa_2Cu_3O_x (YBCO) and La_(2-x)Sr_xCuO_4 (LSCO) are calculated and compared to experiments. Holes transport was taken in the τ-approximation, where τ(T,ε) is due to acoustic phonons. Besides, T-dependence of the chemical potential μ(T) and effective carrier mass m* ~10-100 free electron masses, obtained by negative-U centers modelling the T-dependence of the Hall coefficient, were used to calculate ρ(T). In addition, it is demonstrated that anisotropy of the cuprates does not affect the calculated T-variation of neither Hall coefficient nor ρ, but only rescale their magnitudes by factors depending on combinations of m_ab and m_c.