Villain Transformation for Ferrimagnetic Spin Chain

doi:10.1088/0256-307X/31/6/060506

Chin. Phys. Lett.

2014, Vol. 31

Issue (06): 060506 DOI: 10.1088/0256-307X/31/6/060506

GENERAL

Villain Transformation for Ferrimagnetic Spin Chain

YANG Ge¹, CHEN Bin^1,2**

¹Department of Physics, University of Shanghai for Science and Technology, Shanghai 200093
²Department of Physics, Hangzhou Normal University, Hangzhou 310018

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YANG Ge, CHEN Bin 2014 Chin. Phys. Lett. 31 060506

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Abstract

By using the Villain transformation, the Heisenberg ferrimagnetic spin chain is calculated. Two branches of the low-lying excitation in both the absence and presence of magnetic field are obtained. The thermodynamic quantities (such as free energy, magnetization, specific heat and static magnetic susceptibility) are also evaluated at finite temperature. This is the first time to calculate the Ferrimagnetic spin chain by using Villain's method, and we find that the results at a low temperature are quite similar to the previous calculation. The results of free energy and magnetization in zero temperature suggest that the Villain transformation has a good efficiency.

Published: 26 May 2014

PACS:	05.30.-d	(Quantum statistical mechanics)
	75.10.Jm	(Quantized spin models, including quantum spin frustration)
	75.50.Gg	(Ferrimagnetics)
	75.40.Cx	(Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.))

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https://cpl.iphy.ac.cn/10.1088/0256-307X/31/6/060506 OR https://cpl.iphy.ac.cn/Y2014/V31/I06/060506

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	YANG Ge
	CHEN Bin

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