Analytical Study of the Layered XY Model with VCE Method |
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| Authors: | LIU ShiAn WANG Qing LI Hong CHEN TianLun |
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| Institution: | 1. Department of Physics, Nankai University, Tianjin 300071, China;
2. state Key Laboratory of Optoelectronic .Integration, Institute of Semiconductor, Academia Sinica, Beijing 100083, China |
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| Abstract: | Motivated by experiments on liquid-crystal films, we study the development of specific heat anomaly of finite layer system. With the VCE method, we introduce the strong surface interaction into the layered XY model and get the results of the forth-order analytical expansion. The results show that when the strong surface interaction becomes strong enough, the order trend defeats the quantum noise and the specific heat peak moves abnormally to the high temperature with the number of layers decreasing. |
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| Keywords: | variational cumulant expansion the layered XY model |
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