Studies of non-magnetic impurities in the spin-1/2 Kagome Antiferromagnet

Abstract

Motivated by recent experiments on ZnCu${}_3$(OH)${}_6$Cl${}_2$, we study the inhomogeneous Knight shifts (local susceptibilities) of spin 1/2 Kagome antiferromagnet in the presence of nonmagnetic impurities. Using high temperature series expansion, we calculate the local susceptibility and its histogram down to about T=0.4J. At low temperatures, we explore a Dirac spin liquid proposal and calculate the local susceptibility in the mean field and beyond mean field using Gutzwiller projection, finding the overall picture to be consistent with the NMR experiments.

12 pages, 9 figures

References in corpus (9)

• Spin Dynamics of the Spin-1/2 Kagome Lattice Antiferromagnet ZnCu_3(OH)_6Cl_2
• Projected wavefunction study of Spin-1/2 Heisenberg model on the Kagome lattice
• Quantum magnetism in the paratacamite family: towards an ideal kagome lattice
• Spin Liquid States on the Triangular and Kagome Lattices: A Projective Symmetry Group Analysis of Schwinger Boson States
• Ground State of the Kagome Lattice Heisenberg Antiferromagnet
• Magnetic Susceptibility of the Kagome Antiferromagnet ZnCu3(OH)6Cl2
• D-wave correlated Critical Bose Liquids in two dimensions
• Algebraic vortex liquid theory of a quantum antiferromagnet on the kagome lattice
• Theory of quantum impurities in spin liquids

Cited by in corpus (13)

• Quantum frustration in organic Mott insulators: from spin liquids to unconventional superconductors
• Properties of an algebraic spin liquid on the kagome lattice
• Dzyaloshinsky-Moriya Anisotropy in the Spin-1/2 Kagomé Compound ZnCu${}_3$(OH)${}_6$Cl${}_2$
• Dzyaloshinskii-Moriya anisotropy and non-magnetic impurities in the $s=1/2$ kagome system ZnCu_3(OH)_6Cl_2
• Quantum criticality of the kagome antiferromagnet with Dzyaloshinskii-Moriya interactions
• Gapless Spin Liquid Behavior in A Kagome Heisenberg Antiferromagnet with Randomly Distributed Hexagons of Alternate Bonds
• Monopole Quantum Numbers in the Staggered Flux Spin Liquid
• Impurity-doped Kagome Antiferromagnet: A Quantum Dimer Model Approach
• Dzyaloshinskii-Moriya interactions in valence bond systems
• Specific Heat of the Kagome Antiferromagnet Herbertsmithite in High Magnetic Fields
• Quantum half-orphans in kagome antiferromagnets
• Heat conduction in herbertsmithite: field dependence at the onset of the quantum spin liquid regime
• Strong relevance of Zinc impurity in the spin-$\frac{1}{2}$ Kagome quantum antiferromagnets: a variational study