Inhomogeneous magnetism in the doped kagome lattice of LaCuO2.66

Abstract

The hole-doped kagome lattice of Cu2+ ions in LaCuO2.66 was investigated by nuclear quadrupole resonance (NQR), electron spin resonance (ESR), electrical resistivity, bulk magnetization and specific heat measurements. For temperatures above ~180 K, the spin and charge properties show an activated behavior suggestive of a narrow-gap semiconductor. At lower temperatures, the results indicate an insulating ground state which may or may not be charge ordered. While the frustrated spins in remaining patches of the original kagome lattice might not be directly detected here, the observation of coexisting non-magnetic sites, free spins and frozen moments reveals an intrinsically inhomogeneous magnetism. Numerical simulations of a 1/3-diluted kagome lattice rationalize this magnetic state in terms of a heterogeneous distribution of cluster sizes and morphologies near the site-percolation threshold.

References in corpus (10)

• Projected wavefunction study of Spin-1/2 Heisenberg model on the Kagome lattice
• Unconventional Fermi surface instabilities in the Kagome Hubbard Model
• Quantum phase transition induced by Dzyaloshinskii-Moriya in the kagome antiferromagnet
• Doped Kagome System as Exotic Superconductor
• Algebraic vortex liquid theory of a quantum antiferromagnet on the kagome lattice
• Similar glassy features in the NMR response of pure and disordered La1.88Sr0.12CuO4
• Dzyaloshinskii-Moriya anisotropy and non-magnetic impurities in the $s=1/2$ kagome system ZnCu_3(OH)_6Cl_2
• Impurity-doped Kagome Antiferromagnet: A Quantum Dimer Model Approach
• Bond order wave instabilities in doped frustrated antiferromagnets: "Valence bond solids" at fractional filling
• Formation of collective spins in frustrated clusters

Cited by in corpus (6)

• s-wave superconductivity in kagome metal CsV${}_3$Sb${}_5$ revealed by ${}^{121/123}$Sb NQR and ${}^{51}$V NMR measurements
• Possible star-of-David pattern charge density wave with additional modulation in the kagome superconductor CsV${}_3$Sb${}_5$
• Spin dynamics and disorder effects in the S=1/2 kagome Heisenberg spin liquid phase of kapellasite
• Holon Wigner Crystal in a Lightly Doped Kagome Quantum Spin Liquid
• Unveiling the physics of the doped phase of the Kagome $t-J$ model
• Magnetic fluctuations near the Van Hove singularity in the kagome-lattice Hubbard model at finite doping