Magnetotransport in overdoped La2-xSrxCuO4: Fermi liquid approach

Recently, several experiments on La2-xSrxCuO4 (LSCO) challenged the Fermi liquid picture for overdoped cuprates and stimulated intensive debates. In this work, we study the magnetotransport phenomena in such systems based on the Fermi liquid assumption. The Hall coefficient R-H and magnetoresistivity rho(xx) are investigated near the Van Hove singularity (VHS) x(VHS) approximate to 0.2 across which the Fermi surface topology changes from hole-to electronlike. The main results are (1) R-H drops from positive to negative values with increasing B in the doping regime x(VHS) < x less than or similar to 0.3 and (2) rho(xx) grows as B-2 at small B and saturates at large B, while a nearly linear dependence shows up in the transition regime, which is significantly enlarged near the VHS. These results can be tested by future magnetotransport experiments in overdoped LSCO to check whether the Fermi liquid picture applies or not.

Automated summary

This study investigates the magnetotransport phenomena in overdoped La2-xSrxCuO4 (LSCO) systems based on the Fermi liquid assumption. The results show that near the Van Hove singularity, the Hall coefficient RH and magnetoresistivity ρ(xx) exhibit distinct behaviors as the doping concentration changes, providing insights into the Fermi liquid picture in these systems.