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We consider isotropic quantum antiferromagnets under applied magnetic field, pressure and temperature. The combination of these three tuning handles leads to an extended phase diagram which has not been explored… Click to show full abstract
We consider isotropic quantum antiferromagnets under applied magnetic field, pressure and temperature. The combination of these three tuning handles leads to an extended phase diagram which has not been explored within a single approach. Employing a quantum field theoretic approach that allows us to consider the entire extended phase diagram, we predict the emergence of multiple (three) universalities under combined pressure and field tuning. Changes of universality are signalled by changes of the critical exponent \(\phi \). Explicitly, we predict the existence of two new exponents \(\phi =1\) and 1/2 as well as recovering the known exponent \(\phi =3/2\). We also predict logarithmic corrections to the power law scaling.
Journal Title: Physical Review B
Year Published: 2017
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