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题名: Effective mass of composite fermions: A phenomenological fit to the anomalous propagation of a surface acoustic wave
作者: Yu, Y ;  Su, ZB
刊名: PHYSICAL REVIEW B
出版日期: 2000
卷号: 61, 期号:4, 页码:2855-2862
关键词: QUANTUM HALL STATES ;  FILLED LANDAU-LEVEL ;  V = 1/2 ;  FIELD-THEORY ;  PARTICLES ;  SYSTEMS ;  GAUGE
学科分类: Physics
通讯作者: Yu, Y , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
部门归属: Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
英文摘要: We calculate the conductivity associated with the anomalous propagation of a surface acoustic wave above a two-dimensional electron gas at nu=1/2. Murthy-Shankar's middle representation is adopted, and a contribution to the response functions beyond the random-phase approximation is taken into account. We give a phenomenological fit for the effective mass of a composite fermion, with experimental data for the anomalous propagation of surface acoustic wave at nu=1/2, and find that the phenomenological value of the effective mass is several times larger than the theoretical value m(th)*=6 epsilon/e(2)l(1/2) derived from the Hartree-Fock approximation. We compare the phenomenological value of the composite fermion effective mass with that measured in experiments for the activation energy and the Shubnikov-de Haas oscillations. It is found that the comparison is fairly good.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000085348300070
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/13027
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Yu, Y,Su, ZB. Effective mass of composite fermions: A phenomenological fit to the anomalous propagation of a surface acoustic wave[J]. PHYSICAL REVIEW B,2000,61(4):2855-2862.
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