Recognition: unknown
Quantum criticality in a three dimensional spin system at zero field and pressure
classification
❄️ cond-mat.str-el
keywords
criticalquantummagneticantiferromagneticappearancebrominecdotchange
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We report spontaneous appearance of antiferromagnetic order in a model gapped quantum paramagnet Ni(Cl$_{1-x}$Br$_x$)$_2$$\cdot$4SC(NH$_2$)$_2$ induced by a change in bromine concentration x. This transition is qualitatively similar to a z = 1 magnetic quantum critical point. However, the observed critical scaling of thermodynamic and magnetic properties has rather unusual critical exponents.
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