Critical behavior of the spin-3/2 Blume Capel quantum model with two random transverse single-ion anisotropies

Abstract

Using the approach based on the Bogoliubov inequality for free energy, we have studied the magnetic properties of the spin-3/2 Blume-Capel quantum model in the presence of the random transverse single-ion anisotropy (RTSIA). By analyzis of the phase diagrams in $\tau \times {\phi }_x$, $m\times {\phi }_x$ and $m\times \tau$ plans, we have obtained information about how the presence of anisotropy affects the properties of the system. We have shown that the RTSIA is responsible for changing the topology of the phase diagrams, compared to the pure model, leading to the appearance tricritical point (TCP).

arXiv comment14 pages, 5 figures

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