Negative hopping magnetoresistance and dimensional crossover in lightly doped cuprate superconductors
Valeri N. Kotov, Oleg P. Sushkov, M. B. Silva Neto, L. Benfatto, A. H. Castro Neto
DOI 10.1103/PhysRevB.76.224512 · Physical Review B
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Abstract
We show that, due to the weak ferromagnetism of La2−xSrxCuO4, 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 Néel phase of La2−xSrxCuO4.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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