Localization and Interaction Effects in Strongly Underdoped La2-xSrxCuO4

Abstract

The in-plane magnetoresistance (MR) in La2-xSrxCuO4 films with 0.03 < x < 0.05 has been studied in the temperature range 1.6 K to 100 K, and in magnetic fields up to 14 T, parallel and perpendicular to the CuO2 planes. The behavior of the MR is consistent with a predominant influence of interaction effects at high temperatures, switching gradually to a regime dominated by spin scattering at low T. Weak localization effects are absent. A positive orbital MR appears close to the boundary between the antiferromagnetic and the spin-glass phase, suggesting the onset of Maki-Thompson superconducting fluctuations deep inside the insulating phase.

4 pages, 3 figures, to appear in Phys. Rev. Letters

References in corpus (8)

• Angle-resolved photoemission spectroscopy of the cuprate superconductors
• Nodal metallic behavior of lightly-doped La${}_{2-x}$Sr${}_x$CuO${}_4$
• Mobility of the Doped Holes and the Antiferromagnetic Correlations in Underdoped High-T_c Cuprates
• Observation of New Incommensurate Magnetic Correlations at the Lower Critical Concentration for Superconductivity (x=0.05) in La(2-x)Sr(x)CuO4
• Distribution of spectral weight in a system with disordered stripes
• Magnetotransport in the Normal State of La1.85Sr0.15Cu(1-y)Zn(y)O4 Films
• Orbital Magnetoresistance in the LaSrCuO System
• Impurity and strain effects on the magnetotransport of La1.85Sr0.15Cu(1-y)Zn(y)O4 films

Cited by in corpus (4)

• Origin of the anomalous low temperature upturn in resistivity in the electron-doped cuprates
• Two-dimensional superconductor-insulator quantum phase transitions in an electron-doped cuprate
• Transport anomalies and quantum criticality in electron-doped cuprate superconductors
• Large Positive Magnetoresistance of the Lightly Doped La_{2}CuO_{4} Mott Insulator