3 years ago

Quantum criticality in a three dimensional spin system at zero field and pressure.

A. Zheludev, J. Ollivier, K. Yu. Povarov, G. Perren, A. Mannig, J. S. Möller, E. Wulf

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.

Publisher URL: http://arxiv.org/abs/1708.02776

DOI: arXiv:1708.02776v2

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