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arxiv 1407.5190 v1 pith:E4ZCAUAE submitted 2014-07-19 cond-mat.str-el

Development of spin correlations in the geometrically frustrated triangular-lattice Heisenberg antiferromagnet CuCrO2

classification cond-mat.str-el
keywords spinantiferromagnetclusterscucro2heisenbergmagneticobservedordering
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Magnetic excitations in the triangular-lattice Heisenberg antiferromagnet (TLHA) CuCrO2 were studied using single-crystal inelastic neutron scattering. A diffusive quasielastic component that persisted without developing a correlation length over a wide temperature range both below and above the ordering temperature was observed. Furthermore, characteristic momentum dependence was observed that was reproduced using minimum spin clusters. The robust spin clusters contrast with conventional magnetic ordering and may be universal in TLHAs.

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