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Interfaces in the XY Model and Conformal Invariance |
| ZHANG De-gang1;CHEN Zhong-jun1;LI Bo-zang2 |
| 1Institute of Solid State Physics, Sichuan Normal University, Chengdu 610068
2Institute of Physics, Chinese Academy of Sciences, Beijing 100080
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| Cite this article: |
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ZHANG De-gang, CHEN Zhong-jun, LI Bo-zang 1999 Chin. Phys. Lett. 16 44-46 |
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Abstract The one-dimensional XY model with n arbitrarily placed interfaces is investigated. The energy spectrum is shown to have a tower structure only for a commensurate configuration of the critical parameters. The interfacial critical exponents in such cases are determined from conformal invariance theory. The underlying algebra generating the conformal spectrum is the shifted SO(4c) Kac-Moody algebra, the central charge is 2c, which is exactly two times of that in the Ising model with the same structure of interfaces.
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64.60.-i
05.70.Jk
75.70.-i
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Published: 01 January 1999
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| PACS: |
64.60.-i
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(General studies of phase transitions)
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05.70.Jk
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(Critical point phenomena)
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75.70.-i
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(Magnetic properties of thin films, surfaces, and interfaces)
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