We show that, due to the weak ferromagnetism of La(2-x)Sr(x)CuO(4), an external magnetic field leads to a dimensional crossover from two to three dimensions for the in-plane transport. The crossover results in an increase of the hole's localization length and hence in a dramatic negative magnetoresistance in the variable range hopping regime. This mechanism quantitatively explains puzzling experimental data on the negative magnetoresistance in the Neel phase of La(2-x)Sr(x)CuO(4).
Negative hopping magnetoresistance and dimensional crossover in lightly doped cuprate superconductors / Kotov Valeri, N.; Sushkov Oleg, P.; Silva Neto, M. B.; Benfatto, L.; Castro Neto, A. H.. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 76:22(2007). [10.1103/PhysRevB.76.224512]
Negative hopping magnetoresistance and dimensional crossover in lightly doped cuprate superconductors
Benfatto L.;
2007
Abstract
We show that, due to the weak ferromagnetism of La(2-x)Sr(x)CuO(4), an external magnetic field leads to a dimensional crossover from two to three dimensions for the in-plane transport. The crossover results in an increase of the hole's localization length and hence in a dramatic negative magnetoresistance in the variable range hopping regime. This mechanism quantitatively explains puzzling experimental data on the negative magnetoresistance in the Neel phase of La(2-x)Sr(x)CuO(4).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
