Negative Hopping Magnetoresistance and Dimensional Crossover in Lightly Doped Cuprate Superconductors

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 2D $\to$ 3D 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 La${}_{2-x}$Sr${}_x$CuO${}_4$.

6 pages, 3 figures; published version

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Cited by in corpus (7)

• Skyrmions in a Doped Antiferromagnet
• Gate-tuned Superconductor-Insulator transition in (Li,Fe)OHFeSe
• Non-Gaussian Noise in the In-Plane Transport of Lightly Doped La_{2-x}Sr_{x}CuO_4: Evidence for a Collective State of Charge Clusters
• Large Positive Magnetoresistance of the Lightly Doped La_{2}CuO_{4} Mott Insulator
• History dependent magnetoresistance in lightly doped La_{2-x}Sr_{x}CuO_{4} thin films
• Electronic interlayer coupling in the LTT phase of La1.79Eu0.2Sr0.01CuO4
• AC Hopping Magnetotransport Across the Spin Flop Transition in Lightly Doped La_2CuO_4