Random crystal field effects for spin-3/2 Blume-Capel model |
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Authors: | Erhan Albayrak |
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Institution: | Erciyes University, Department of Physics, 38039 Kayseri, Turkey |
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Abstract: | The effects of crystal field (Δ) which is randomly turned on with probability p or turned off with probability 1−p on the sites of the Bethe lattice are investigated to study the critical behavior of the spin-3/2 Blume-Capel model. The order-parameters are obtained in terms of the recursion relations and then the possible phase diagrams are calculated at finite temperatures for given system parameters p, Δ and coordination numbers z=3, 4, 5 and 6. It was found that the phase diagrams change drastically for given probability and randomness. The first-order phase transitions are only found for higher p values and the lines of which get shorter and eventually disappear as p decreases. The critical lines do not present any qualitative differences with z, but they are seen at higher temperatures for higher z. |
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Keywords: | Random crystal field Bethe lattice Spin-3/2 |
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