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

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

2008-02-03

arxiv.org/abs/0802.0299v1

Physics

Condensed Matter

Strongly Correlated Electrons

12 pages, 9 figures

Scientific paper

10.1103/PhysRevB.77.184423

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.

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