New results of ultra-flow temperature experiments in the second Landau level in a two-dimensional electron system

Jian Sheng Xia; W. Pan; Carlos L. Vicente; E. Dwight Adams; N. S. Sullivan; H. L. Stormer; D. C. Tsui; L. N. Pfeiffer; K. W. Baldwin; K. W. West

doi:10.1023/b:jolt.0000012612.06765.d5

New results of ultra-flow temperature experiments in the second Landau level in a two-dimensional electron system

Jian Sheng Xia, W. Pan, Carlos L. Vicente, E. Dwight Adams, N. S. Sullivan, H. L. Stormer, D. C. Tsui, L. N. Pfeiffer, K. W. Baldwin, K. W. West

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3 Scopus citations

Abstract

In the second Landau level around v = 5/2 filling of an extremely high quality 2D electron system and at temperatures T down to 9 mK we observe a very strong even-denominator fractional quantum Hall effect at Landau level filling v = 5/2 and its energy gap is large and △ ∼ 0.45K. A clear FQHE state is seen at v = 2 + 2/5, with well-quantized R_xy. A novel, even-denominator FQHE state at v = 2 + 3/8 seems to develop, as deduced from the T-dependence of dR_xy/dB. In addition, four fully developed re-entrant integral quantum Hall effect (RIQHE) states are also observed. At low temperatures, the wide RIQHE plateau around at v = 2 + 2/7 is interrupted by a dip, indicating an additional reentrance. Finally, the tilted magnetic field experiment at an ultra-low temperature of 10 mK was carried out to examine the spin-polarization of the v = 5/2 FQHE state.

Original language	English (US)
Pages (from-to)	579-584
Number of pages	6
Journal	Journal of Low Temperature Physics
Volume	134
Issue number	1-2
DOIs	https://doi.org/10.1023/b:jolt.0000012612.06765.d5
State	Published - Jan 2004
Externally published	Yes

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics
General Materials Science
Condensed Matter Physics

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10.1023/b:jolt.0000012612.06765.d5

Cite this

Xia, J. S., Pan, W., Vicente, C. L., Adams, E. D., Sullivan, N. S., Stormer, H. L., Tsui, D. C., Pfeiffer, L. N., Baldwin, K. W., & West, K. W. (2004). New results of ultra-flow temperature experiments in the second Landau level in a two-dimensional electron system. Journal of Low Temperature Physics, 134(1-2), 579-584. https://doi.org/10.1023/b:jolt.0000012612.06765.d5

@article{d86fe625360e4360a6f04ead757c606a,

title = "New results of ultra-flow temperature experiments in the second Landau level in a two-dimensional electron system",

abstract = "In the second Landau level around v = 5/2 filling of an extremely high quality 2D electron system and at temperatures T down to 9 mK we observe a very strong even-denominator fractional quantum Hall effect at Landau level filling v = 5/2 and its energy gap is large and △ ∼ 0.45K. A clear FQHE state is seen at v = 2 + 2/5, with well-quantized Rxy. A novel, even-denominator FQHE state at v = 2 + 3/8 seems to develop, as deduced from the T-dependence of dRxy/dB. In addition, four fully developed re-entrant integral quantum Hall effect (RIQHE) states are also observed. At low temperatures, the wide RIQHE plateau around at v = 2 + 2/7 is interrupted by a dip, indicating an additional reentrance. Finally, the tilted magnetic field experiment at an ultra-low temperature of 10 mK was carried out to examine the spin-polarization of the v = 5/2 FQHE state.",

author = "Xia, {Jian Sheng} and W. Pan and Vicente, {Carlos L.} and Adams, {E. Dwight} and Sullivan, {N. S.} and Stormer, {H. L.} and Tsui, {D. C.} and Pfeiffer, {L. N.} and Baldwin, {K. W.} and West, {K. W.}",

year = "2004",

month = jan,

doi = "10.1023/b:jolt.0000012612.06765.d5",

language = "English (US)",

volume = "134",

pages = "579--584",

journal = "Journal of Low Temperature Physics",

issn = "0022-2291",

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T1 - New results of ultra-flow temperature experiments in the second Landau level in a two-dimensional electron system

AU - Xia, Jian Sheng

AU - Pan, W.

AU - Vicente, Carlos L.

AU - Adams, E. Dwight

AU - Sullivan, N. S.

AU - Stormer, H. L.

AU - Tsui, D. C.

AU - Pfeiffer, L. N.

AU - Baldwin, K. W.

AU - West, K. W.

PY - 2004/1

Y1 - 2004/1

N2 - In the second Landau level around v = 5/2 filling of an extremely high quality 2D electron system and at temperatures T down to 9 mK we observe a very strong even-denominator fractional quantum Hall effect at Landau level filling v = 5/2 and its energy gap is large and △ ∼ 0.45K. A clear FQHE state is seen at v = 2 + 2/5, with well-quantized Rxy. A novel, even-denominator FQHE state at v = 2 + 3/8 seems to develop, as deduced from the T-dependence of dRxy/dB. In addition, four fully developed re-entrant integral quantum Hall effect (RIQHE) states are also observed. At low temperatures, the wide RIQHE plateau around at v = 2 + 2/7 is interrupted by a dip, indicating an additional reentrance. Finally, the tilted magnetic field experiment at an ultra-low temperature of 10 mK was carried out to examine the spin-polarization of the v = 5/2 FQHE state.

AB - In the second Landau level around v = 5/2 filling of an extremely high quality 2D electron system and at temperatures T down to 9 mK we observe a very strong even-denominator fractional quantum Hall effect at Landau level filling v = 5/2 and its energy gap is large and △ ∼ 0.45K. A clear FQHE state is seen at v = 2 + 2/5, with well-quantized Rxy. A novel, even-denominator FQHE state at v = 2 + 3/8 seems to develop, as deduced from the T-dependence of dRxy/dB. In addition, four fully developed re-entrant integral quantum Hall effect (RIQHE) states are also observed. At low temperatures, the wide RIQHE plateau around at v = 2 + 2/7 is interrupted by a dip, indicating an additional reentrance. Finally, the tilted magnetic field experiment at an ultra-low temperature of 10 mK was carried out to examine the spin-polarization of the v = 5/2 FQHE state.

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New results of ultra-flow temperature experiments in the second Landau level in a two-dimensional electron system

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