Other even-denominator fractions

W. Pan; A. S. Yeh; J. S. Xia; H. L. Stormer; D. C. Tsui; E. D. Adams; L. N. Pfeiffer; K. W. Baldwin; K. W. West

doi:10.1016/S1386-9477(00)00171-5

Other even-denominator fractions

W. Pan, A. S. Yeh, J. S. Xia, H. L. Stormer, D. C. Tsui, E. D. Adams, L. N. Pfeiffer, K. W. Baldwin, K. W. West

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

3 Scopus citations

Abstract

Experimental data on the sequence of fractional quantum Hall effects (FQHE) states around Landau level filling factor v = 1/2 are well explained within the framework of the composite fermion model. Around other even-denominator fractions the situation is less clear, experimentally as well as theoretically. In this paper we report experimental studies at even-denominator fillings at v = 1/4, 3/4, 5/2, etc. We show that the composite fermion picture can be applied successfully to the fractions at v = 1/4 and 3/4. Their effective mass, when normalized to B^1/2 (where B is the magnetic field) and their effective g factor are very similar to the composite fermions at v = 1/2 and 3/2. Our ultra-low-temperature study at v = 5/2 shows that this fraction is a true FQHE state, showing vanishing R_xx and a Hall resistance R_xy precisely quantized to h/(5/2e²).

Original language	English (US)
Pages (from-to)	9-16
Number of pages	8
Journal	Physica E: Low-Dimensional Systems and Nanostructures
Volume	9
Issue number	1
DOIs	https://doi.org/10.1016/S1386-9477(00)00171-5
State	Published - Jan 2001
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Condensed Matter Physics

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10.1016/S1386-9477(00)00171-5

Cite this

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title = "Other even-denominator fractions",

abstract = "Experimental data on the sequence of fractional quantum Hall effects (FQHE) states around Landau level filling factor v = 1/2 are well explained within the framework of the composite fermion model. Around other even-denominator fractions the situation is less clear, experimentally as well as theoretically. In this paper we report experimental studies at even-denominator fillings at v = 1/4, 3/4, 5/2, etc. We show that the composite fermion picture can be applied successfully to the fractions at v = 1/4 and 3/4. Their effective mass, when normalized to B1/2 (where B is the magnetic field) and their effective g factor are very similar to the composite fermions at v = 1/2 and 3/2. Our ultra-low-temperature study at v = 5/2 shows that this fraction is a true FQHE state, showing vanishing Rxx and a Hall resistance Rxy precisely quantized to h/(5/2e2).",

author = "W. Pan and Yeh, {A. S.} and Xia, {J. S.} and Stormer, {H. L.} and Tsui, {D. C.} and Adams, {E. D.} and Pfeiffer, {L. N.} and Baldwin, {K. W.} and West, {K. W.}",

year = "2001",

month = jan,

doi = "10.1016/S1386-9477(00)00171-5",

language = "English (US)",

volume = "9",

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journal = "Physica E: Low-Dimensional Systems and Nanostructures",

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T1 - Other even-denominator fractions

AU - Pan, W.

AU - Yeh, A. S.

AU - Xia, J. S.

AU - Stormer, H. L.

AU - Tsui, D. C.

AU - Adams, E. D.

AU - Pfeiffer, L. N.

AU - Baldwin, K. W.

AU - West, K. W.

PY - 2001/1

Y1 - 2001/1

N2 - Experimental data on the sequence of fractional quantum Hall effects (FQHE) states around Landau level filling factor v = 1/2 are well explained within the framework of the composite fermion model. Around other even-denominator fractions the situation is less clear, experimentally as well as theoretically. In this paper we report experimental studies at even-denominator fillings at v = 1/4, 3/4, 5/2, etc. We show that the composite fermion picture can be applied successfully to the fractions at v = 1/4 and 3/4. Their effective mass, when normalized to B1/2 (where B is the magnetic field) and their effective g factor are very similar to the composite fermions at v = 1/2 and 3/2. Our ultra-low-temperature study at v = 5/2 shows that this fraction is a true FQHE state, showing vanishing Rxx and a Hall resistance Rxy precisely quantized to h/(5/2e2).

AB - Experimental data on the sequence of fractional quantum Hall effects (FQHE) states around Landau level filling factor v = 1/2 are well explained within the framework of the composite fermion model. Around other even-denominator fractions the situation is less clear, experimentally as well as theoretically. In this paper we report experimental studies at even-denominator fillings at v = 1/4, 3/4, 5/2, etc. We show that the composite fermion picture can be applied successfully to the fractions at v = 1/4 and 3/4. Their effective mass, when normalized to B1/2 (where B is the magnetic field) and their effective g factor are very similar to the composite fermions at v = 1/2 and 3/2. Our ultra-low-temperature study at v = 5/2 shows that this fraction is a true FQHE state, showing vanishing Rxx and a Hall resistance Rxy precisely quantized to h/(5/2e2).

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DO - 10.1016/S1386-9477(00)00171-5

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EP - 16

JO - Physica E: Low-Dimensional Systems and Nanostructures

JF - Physica E: Low-Dimensional Systems and Nanostructures

IS - 1

ER -

Other even-denominator fractions

Abstract

All Science Journal Classification (ASJC) codes

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