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We investigate magnetic properties of lightly doped antiferromagnetic Mottinsulators in the presence of non-magnetic impurities. Within the framework ofthe t-J model we calculate the doping dependence of the antiferromagnetic orderparameter using the self-consistent diagrammatic techniques. We show that inthe presence of non-magnetic impurities the antiferromagnetic order is morerobust against hole doping in comparison with the impurity-free host, implyingthat magnetic order can re-appear upon Zn doping into lightly hole-dopedcuprates. We argue that this is primarily due to the loss of coherence andreduced mobility of the hole quasiparticles caused by impurity scattering.These results are consistent with experimental data on Zn-doped LaSrCuO.Comment: 11 pages, 7 figs, (v2) final version as publishe

Magnetic order in lightly doped cuprates: Coherent versus incoherent hole quasiparticles and nonmagnetic impurities