AC Hopping Magnetotransport Across the Spin Flop Transition in Lightly Doped La_2CuO_4

Abstract

The weak ferromagnetism present in insulating La_{2}CuO_4 at low doping leads to a spin flop transition, and to transverse (interplane) hopping of holes in a strong external magnetic field. This results in a dimensional crossover 2D $\to$ 3D for the in-plane transport, which in turn leads to an increase of the hole's localization length and increased conduction. We demonstrate theoretically that as a consequence of this mechanism, a frequency-dependent jump of the in-plane ac hopping conductivity occurs at the spin flop transition. We predict the value and the frequency dependence of the jump. Experimental studies of this effect would provide important confirmation of the emerging understanding of lightly doped insulating La_{2-x}Sr_xCuO_4.

arXiv comment4 pages, 1 figure

References in corpus (24)

• Static magnetic correlations near the insulating-superconducting phase boundary in La${}_{2-x}$Sr${}_x$CuO${}_4$
• Observation of New Incommensurate Magnetic Correlations at the Lower Critical Concentration for Superconductivity (x=0.05) in La(2-x)Sr(x)CuO4
• Static and dynamic spin correlations in the spin-glass phase of slightly-doped La_{2-x}Sr_xCuO_4
• Electronic phase separation in lightly-doped La${}_{2-x}$Sr${}_x$CuO${}_4$
• Anisotropic Magnetoresistance in Lightly Doped La_{2-x}Sr_{x}CuO_{4}: Impact of Anti-Phase Domain Boundaries on the Electron Transport
• Crystal structure and high-field magnetism of La2CuO4
• Spin-glass phase of cuprates
• Theory of incommensurate magnetic correlations across the insulator-superconductor transition in underdoped La_{2-x}Sr_xCuO_4
• Magnetic order in lightly doped La_{2-x}Sr_{x}CuO_{4}
• Destruction of Neel order and local spin spirals in insulating La_{2-x}Sr_xCuO_4
• Field dependence of the magnetic spectrum in anisotropic and Dzyaloshinskii-Moriya antiferromagnets: I. Theory
• Low-frequency spin dynamics in the orthorombic phase of La_2CuO_4
• Spin reorientation and in-plane magnetoresistance of lightly doped La_{2-x}Sr_{x}CuO_{4} in magnetic fields up to 55 T
• Lightly doped La(2-x)Sr(x)CuO(4) as a Lifshitz helimagnet
• Local spin spirals in the Neel phase of La_{2-x}Sr_xCuO_4
• Dynamics of topological defects in a spiral: a scenario for the spin-glass phase of cuprates
• Field dependence of the magnetic spectrum in anisotropic and Dzyaloshinskii-Moriya antiferromagnets: II. Raman spectroscopy
• Theory of Anisotropic Hopping Transport due to Spiral Correlations in the Spin-Glass Phase of Underdoped Cuprates
• Negative Hopping Magnetoresistance and Dimensional Crossover in Lightly Doped Cuprate Superconductors
• Slow spin-glass and fast spin-liquid components in quasi-two-dimensional La2(Cu,Li)O4
• Commensurate dynamic magnetic correlations in La2(Cu,Li)O4
• Partial spin freezing in the quasi-two-dimensional La2(Cu,Li)O4
• Spin-flop transitions and spin-wave gaps in La_2CuO_4
• Impurity susceptibility and the fate of spin-flop transitions in lightly-doped La(2)CuO(4)