Phase diagrams in an ultra-thin spin-1 transverse Ising film with bond or site dilution at surfaces |
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Authors: | T Kaneyoshi |
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Institution: | 1. Nagoya University, 1-510, Kurosawadai, Midoriku, Nagoya, Japankaneyosi@is.nagoya-u.ac.jp |
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Abstract: | The phase diagrams of two nanoscaled thin films with bond and site dilutions at the surfaces, described by the spin-1 transverse Ising model, are investigated by the use of an effective field theory with correlations. A number of characteristic phenomena have been found in them, which are heavily dependent on the ratios (r = J1/J and p = ΩS/Ω, where J is the exchange interaction in the inner layer, J1 is the exchange interaction between the surface and the next inner layer, ΩS is the transverse field at the surfaces and Ω is the transverse field in the inner layer). Some of them have exhibited very similar behaviors found in the two spin-1/2 nanoscaled thin films with bond and site dilutions at the surfaces. |
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Keywords: | nanoscaled thin films phase diagrams transverse Ising model effective field theory |
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