Measurement of low energy charge correlations in underdoped spin-glass La-based cuprates using impedance spectroscopy

Abstract

We report on the charge kinetics of La_2CuO_4 lightly doped with Li and Sr. Impedance spectroscopy measurements down to 25mK and from 20Hz to 500kHz reveal evidence for low energy charge dynamics, which slow down with decreasing temperature. Both systems are acutely sensitive to stoichiometry. In the case of Sr substitution, which at higher carrier concentration evolves to a high temperature superconductor, the ground state in the pseudogap-doping regime is one of spatially segregated, dynamic charge domains. The charge carriers slow down at substantially lower temperatures than their spin counterparts and the dynamics are particularly sensitive to crystallographic direction. This is contrasted with the case of Li-doping.

arXiv comment4 pages, 4 figures

References in corpus (17)

• How to detect fluctuating order in the high-temperature superconductors
• An Intrinsic Bond-Centered Electronic Glass with Unidirectional Domains in Underdoped Cuprates
• Electrical Resistivity Anisotropy from Self-Organized One-Dimensionality in High-Temperature Superconductors
• Order and quantum phase transitions in the cuprate superconductors
• Electronic phase separation in lightly-doped La${}_{2-x}$Sr${}_x$CuO${}_4$
• (63)Cu NQR Evidence for Spatial Variation of Hole Concentration in La(2-x)Sr(x)CuO(4)
• Evidence for a generic novel quantum transition in high-Tc cuprates
• Charge Segregation, Cluster Spin-Glass and Superconductivity in La1.94Sr0.06CuO4
• Unusual magnetic susceptibility anisotropy in untwinned La_{2-x}Sr_xCuO_4 single crystals in the lightly-doped region
• A Novel Dielectric Anomaly in Cuprates and Nickelates: Signature of an Electronic Glassy State
• c-Axis Transport and Resistivity Anisotropy of Lightly- to Moderately-Doped La_{2-x}Sr_{x}CuO_{4} Single Crystals: Implications on the Charge Transport Mechanism
• Anisotropic Magnetoresistance in Lightly Doped La_{2-x}Sr_{x}CuO_{4}: Impact of Anti-Phase Domain Boundaries on the Electron Transport
• Systematic Study of Short Range Antiferromagnetic Order and The Spin-Glass State in Lightly Doped La2-xSrxCuO4
• Dynamical Properties of Charged Stripes in La_{2-x}Sr_xCuO_4
• Infrared signatures of hole and spin stripes in La{2-x}Sr{x}CuO{4}
• Destruction of Neel order and local spin spirals in insulating La_{2-x}Sr_xCuO_4
• Magnetic Properties and Phase Diagram of Li-doped La(2)CuO(4): Common Magnetic Response of Hole-doped CuO2 Planes

Cited by in corpus (7)

• Lattice symmetry breaking in cuprate superconductors: Stripes, nematics, and superconductivity
• Emergence of superconductivity from the dynamically heterogeneous insulating state in La_{2-x}Sr_{x}CuO_{4}
• 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
• Low-temperature ferroelectric phase and magnetoelectric coupling in the underdoped La_2CuO_(4+x)
• Large Positive Magnetoresistance of the Lightly Doped La_{2}CuO_{4} Mott Insulator
• Ferroelectricity in underdoped La-based cuprates
• History dependent magnetoresistance in lightly doped La_{2-x}Sr_{x}CuO_{4} thin films