Composite fermions around Landau level filling factor v = 3/2

R. R. Du; A. S. Yeh; H. L. Stormer; D. C. Tsui; L. N. Pfeiffer; K. W. West

doi:10.1016/0039-6028(96)80104-X

Composite fermions around Landau level filling factor v = 3/2

R. R. Du, A. S. Yeh, H. L. Stormer, D. C. Tsui, L. N. Pfeiffer, K. W. West

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

Our magnetotransport experiments on a low-density two-dimensional electron sample detect an alternating strength of the fractional quantum Hall effect (FQHE) states around Landau level filling factor v = 3/2 as the magnetic field is moving away from v = 3/2. This is viewed as a manifestation of spin-split levels of composite fermions around v = 3/2. A cyclotron effective mass m*_cf ≈ 0.4m₀ (where m₀ is the free electron mass) of composite fermions around v = 3/2 is deduced from Shubnikov-de Haas oscillations in a tilted (θ = 73°) magnetic field. This value is found to be in keeping with a mass of m*_cf ≈ 0.7m₀ determined around v = 1/2 in the same sample once the √B-dependence is taken into account.

Original language	English (US)
Pages (from-to)	26-29
Number of pages	4
Journal	Surface Science
Volume	361-362
DOIs	https://doi.org/10.1016/0039-6028(96)80104-X
State	Published - Jul 20 1996
Externally published	Yes

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films
Materials Chemistry

Keywords

Electrical transport
Hall effect
Quantum effects
Semiconductor-semiconductor heterostructures

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10.1016/0039-6028(96)80104-X

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title = "Composite fermions around Landau level filling factor v = 3/2",

abstract = "Our magnetotransport experiments on a low-density two-dimensional electron sample detect an alternating strength of the fractional quantum Hall effect (FQHE) states around Landau level filling factor v = 3/2 as the magnetic field is moving away from v = 3/2. This is viewed as a manifestation of spin-split levels of composite fermions around v = 3/2. A cyclotron effective mass m*cf ≈ 0.4m0 (where m0 is the free electron mass) of composite fermions around v = 3/2 is deduced from Shubnikov-de Haas oscillations in a tilted (θ = 73°) magnetic field. This value is found to be in keeping with a mass of m*cf ≈ 0.7m0 determined around v = 1/2 in the same sample once the √B-dependence is taken into account.",

keywords = "Electrical transport, Hall effect, Quantum effects, Semiconductor-semiconductor heterostructures",

author = "Du, {R. R.} and Yeh, {A. S.} and Stormer, {H. L.} and Tsui, {D. C.} and Pfeiffer, {L. N.} and West, {K. W.}",

year = "1996",

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doi = "10.1016/0039-6028(96)80104-X",

language = "English (US)",

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journal = "Surface Science",

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T1 - Composite fermions around Landau level filling factor v = 3/2

AU - Du, R. R.

AU - Yeh, A. S.

AU - Stormer, H. L.

AU - Tsui, D. C.

AU - Pfeiffer, L. N.

AU - West, K. W.

PY - 1996/7/20

Y1 - 1996/7/20

N2 - Our magnetotransport experiments on a low-density two-dimensional electron sample detect an alternating strength of the fractional quantum Hall effect (FQHE) states around Landau level filling factor v = 3/2 as the magnetic field is moving away from v = 3/2. This is viewed as a manifestation of spin-split levels of composite fermions around v = 3/2. A cyclotron effective mass m*cf ≈ 0.4m0 (where m0 is the free electron mass) of composite fermions around v = 3/2 is deduced from Shubnikov-de Haas oscillations in a tilted (θ = 73°) magnetic field. This value is found to be in keeping with a mass of m*cf ≈ 0.7m0 determined around v = 1/2 in the same sample once the √B-dependence is taken into account.

AB - Our magnetotransport experiments on a low-density two-dimensional electron sample detect an alternating strength of the fractional quantum Hall effect (FQHE) states around Landau level filling factor v = 3/2 as the magnetic field is moving away from v = 3/2. This is viewed as a manifestation of spin-split levels of composite fermions around v = 3/2. A cyclotron effective mass m*cf ≈ 0.4m0 (where m0 is the free electron mass) of composite fermions around v = 3/2 is deduced from Shubnikov-de Haas oscillations in a tilted (θ = 73°) magnetic field. This value is found to be in keeping with a mass of m*cf ≈ 0.7m0 determined around v = 1/2 in the same sample once the √B-dependence is taken into account.

KW - Electrical transport

KW - Hall effect

KW - Quantum effects

KW - Semiconductor-semiconductor heterostructures

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U2 - 10.1016/0039-6028(96)80104-X

DO - 10.1016/0039-6028(96)80104-X

M3 - Article

AN - SCOPUS:0030193036

SN - 0039-6028

VL - 361-362

SP - 26

EP - 29

JO - Surface Science

JF - Surface Science

ER -

Composite fermions around Landau level filling factor v = 3/2

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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