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THE Q-DEFORMED SU(2) QUANTUM FERROMAGNETIC MODEL
LU, ZY; YAN, H; LU, ZY , ACAD SINICA,INST THEORET PHYS,BEIJING 100080,PEOPLES R CHINA.
1993
发表期刊COMMUNICATIONS IN THEORETICAL PHYSICS
ISSN0253-6102
卷号19期号:2页码:169-178
摘要A q-deformed SU(2) Heisenberg (3-dimensional) spin model is set up, and the q-deformed spin-wave solution is obtained through the q-analogous Holstein-Primakoff transformation. The result is given for small gamma = ln q, which is the quantity characterizing the nonlinearity of the Hamiltonian. A mean-field treatment is arranged to preserve (at least some of) the nonlinearity, and the ordinary ferromagnet ground state is shown as the exact ground state of the new system. Interesting results are obtained for this nonlinear model: (i) There is an energy gap between the ground state and the first excited one, thus the ground state is stable under small perturbation of the background; (ii) the specific heat per volume is modified by a small term proportional to the (112)-th power of temperature and the square of gamma, which is qualitatively different from the conventional model, and (iii) the magnetization M(T) is modified by a factor that depends on gamma.
关键词Yang-baxter Equation Suq Differential-calculus H->0(2) Harmonic-oscillator Diatomic-molecules Q-deformations Lie-algebra Q-analogs Representations Systems
学科领域Physics
收录类别SCI
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/12101
专题理论物理所1978-2010年知识产出
通讯作者LU, ZY , ACAD SINICA,INST THEORET PHYS,BEIJING 100080,PEOPLES R CHINA.
推荐引用方式
GB/T 7714
LU, ZY,YAN, H,LU, ZY , ACAD SINICA,INST THEORET PHYS,BEIJING 100080,PEOPLES R CHINA.. THE Q-DEFORMED SU(2) QUANTUM FERROMAGNETIC MODEL[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,1993,19(2):169-178.
APA LU, ZY,YAN, H,&LU, ZY , ACAD SINICA,INST THEORET PHYS,BEIJING 100080,PEOPLES R CHINA..(1993).THE Q-DEFORMED SU(2) QUANTUM FERROMAGNETIC MODEL.COMMUNICATIONS IN THEORETICAL PHYSICS,19(2),169-178.
MLA LU, ZY,et al."THE Q-DEFORMED SU(2) QUANTUM FERROMAGNETIC MODEL".COMMUNICATIONS IN THEORETICAL PHYSICS 19.2(1993):169-178.
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