Abstract
We consider the exactly solvable spin-1/2 XX chain with the three-spin interactions of the XZX + YZY and XZY − YZX types in an external (transverse) magnetic field. We calculate the entropy and examine the magnetocaloric effect for the quantum spin system. We discuss a relation between the cooling/heating efficiency and the ground-state phase diagram of the quantum spin model. We also compare ability to cool/heat in the vicinity of the quantum critical and triple points. Moreover, we examine the magnetocaloric effect for the spin-1/2 XX chain with three-spin interactions in a random (Lorentzian) transverse magnetic field.
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Topilko, M., Krokhmalskii, T., Derzhko, O. et al. Magnetocaloric effect in spin-1/2 XX chains with three-spin interactions. Eur. Phys. J. B 85, 278 (2012). https://doi.org/10.1140/epjb/e2012-30359-8
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DOI: https://doi.org/10.1140/epjb/e2012-30359-8