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arxiv 1004.0444 v1 pith:L77T4V3L submitted 2010-04-03 cond-mat.str-el

The incarnation of the Nersesyan-Tsvelik model in (NO)[Cu(NO3)3]

O. Volkova , I. Morozov , V. Shutov , E. Lapsheva , P. Sindzingre , O. Cepas , M. Yehia , V. Kataev
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R. Klingeler B. B\"uchner A. Vasiliev
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classification cond-mat.str-el
keywords bondmagneticmodelnersesyan-tsvelikstatevalencearguedbehavior
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The topology of the magnetic interactions of the copper spins in the nitrosonium nitratocuprate (NO)[Cu(NO3)3] suggests that it could be a realization of the Nersesyan-Tsvelik model, whose ground state was argued to be either a resonating valence bond (RVB) state or a valence bond crystal (VBC). The measurement of thermodynamic and resonant properties reveals a behavior inherent to low dimensional spin S = 1/2 systems and provides indeed no evidence for the formation of long-range magnetic order down to 1.8 K.

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