Very low-frequency excitations in frustrated two-dimensional $S=1/2$ Heisenberg antiferromagnets

N. Papinutto; P. Carretta; P. Millet; R. Melzi

arxiv: cond-mat/0110398 · v1 · submitted 2001-10-19 · ❄️ cond-mat.str-el

Very low-frequency excitations in frustrated two-dimensional S=1/2 Heisenberg antiferromagnets

P. Carretta , R. Melzi , N. Papinutto , P. Millet This is my paper

classification ❄️ cond-mat.str-el

keywords heisenbergantiferromagnetsdynamicsfrustratedtwo-dimensionalassociatedbelowcoexisting

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muSR and 7Li NMR relaxation measurements in frustrated two-dimensional S=1/2 Heisenberg antiferromagnets on a square lattice are presented. It is found that both in Li2VOSiO4 and Li2VOGeO4, spin dynamics at frequencies well below the Heisenberg exchange frequency are present. These dynamics are associated with the motions of walls separating coexisting collinear domains with a magnetic wave vector rotated by 90 degrees.

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Very low-frequency excitations in frustrated two-dimensional S=1/2 Heisenberg antiferromagnets

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