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19 March 2024
 
  » arxiv » 1409.1763

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Quantum spin chain as a potential realization of the Nersesyan-Tsvelik model
C. Balz ; B. Lake ; H. Luetkens ; C. Baines ; T. Guidi ; M. Abdel-Hafiez ; A.U.B. Wolter ; B. Büchner ; I.V. Morozov ; E.B. Deeva ; O.S. Volkova ; A.N. Vasiliev ;
Date 5 Sep 2014
AbstractIt is well established that long-range magnetic order is suppressed in magnetic systems whose interactions are low-dimensional. The prototypical example is the S-1/2 Heisenberg antiferromagnetic chain (S-1/2 HAFC) whose ground state is quantum critical. In real S-1/2 HAFC compounds interchain coupling induces long-range magnetic order although with a suppressed ordered moment and reduced N’eel temperature compared to the Curie-Weiss temperature. Recently, it was suggested that order can also be suppressed if the interchain interactions are frustrated, as for the Nersesyan-Tsvelik model. Here, we study the new S-1/2 HAFC, (NO)[Cu(NO3)3]. This material shows extreme suppression of order which furthermore is incommensurate revealing the presence of frustration consistent with the Nersesyan-Tsvelik model.
Source arXiv, 1409.1763
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