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Effective mass of composite fermions: A phenomenological fit to the anomalous propagation of a surface acoustic wave
Yu, Y; Su, ZB; Yu, Y , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
2000
发表期刊PHYSICAL REVIEW B
ISSN1098-0121
卷号61期号:4页码:2855-2862
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.
部门归属Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
关键词Quantum Hall States Filled Landau-level v = 1/2 Field-theory Particles Systems Gauge
学科领域Physics
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收录类别SCI
WOS记录号WOS:000085348300070
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文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/13027
专题理论物理所1978-2010年知识产出
通讯作者Yu, Y , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.
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Yu, Y,Su, ZB,Yu, Y , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China.. 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.
APA Yu, Y,Su, ZB,&Yu, Y , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China..(2000).Effective mass of composite fermions: A phenomenological fit to the anomalous propagation of a surface acoustic wave.PHYSICAL REVIEW B,61(4),2855-2862.
MLA Yu, Y,et al."Effective mass of composite fermions: A phenomenological fit to the anomalous propagation of a surface acoustic wave".PHYSICAL REVIEW B 61.4(2000):2855-2862.
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