Effect of Zeeman energy on heat capacity of GaAs/AlGaAs heterostructures near ν = 1

S. Melinte; E. Grivei; J. M. Beuken; G. Mariage; L. Malcorps; C. Gustin; V. Bayot; M. Shayegan

doi:10.1016/S1386-9477(99)00054-5

Effect of Zeeman energy on heat capacity of GaAs/AlGaAs heterostructures near ν = 1

S. Melinte, E. Grivei, J. M. Beuken, G. Mariage, L. Malcorps, C. Gustin, V. Bayot, M. Shayegan

Research output: Contribution to journal › Conference article › peer-review

Abstract

By controlling the ratio η between the Zeeman and Coulomb energies, the heat capacity of a multilayer two-dimensional electron system (2DES) is measured near Landau level filling ν = 1 at 60 mK. The data reveal the disappearance of the nuclear spin contribution of GaAs quantum wells to the heat capacity as η exceeds a critical value η_C≈0.04. This result is interpreted as the effect of the transition from Skyrmions to single electron spin flips at large Zeeman energy.

Original language	English (US)
Pages (from-to)	52-55
Number of pages	4
Journal	Physica E: Low-Dimensional Systems and Nanostructures
Volume	6
Issue number	1
DOIs	https://doi.org/10.1016/S1386-9477(99)00054-5
State	Published - Feb 2000
Event	13th International Conference on the Electronic Properties of Two-Dimensional Systems (EP2DS-13) - Ottawa, Ont, Can Duration: Aug 1 1999 → Aug 6 1999

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(99)00054-5

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title = "Effect of Zeeman energy on heat capacity of GaAs/AlGaAs heterostructures near ν = 1",

abstract = "By controlling the ratio η between the Zeeman and Coulomb energies, the heat capacity of a multilayer two-dimensional electron system (2DES) is measured near Landau level filling ν = 1 at 60 mK. The data reveal the disappearance of the nuclear spin contribution of GaAs quantum wells to the heat capacity as η exceeds a critical value ηC≈0.04. This result is interpreted as the effect of the transition from Skyrmions to single electron spin flips at large Zeeman energy.",

author = "S. Melinte and E. Grivei and Beuken, {J. M.} and G. Mariage and L. Malcorps and C. Gustin and V. Bayot and M. Shayegan",

note = "Funding Information: The authors are much indebted to N.R. Cooper, T. Jungwirth and S.P. Shukla for numerical calculations. This work has been supported by NATO grant CRG 950328 and the NSF MRSEC grant DMR-9809483. The work performed in Louvain-la-Neuve was carried out under financial support of the programme “PAI” sponsored by the “Communaut{\'e} Fran{\c c}aise de Belgique”.; 13th International Conference on the Electronic Properties of Two-Dimensional Systems (EP2DS-13) ; Conference date: 01-08-1999 Through 06-08-1999",

year = "2000",

month = feb,

doi = "10.1016/S1386-9477(99)00054-5",

language = "English (US)",

volume = "6",

pages = "52--55",

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

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TY - JOUR

T1 - Effect of Zeeman energy on heat capacity of GaAs/AlGaAs heterostructures near ν = 1

AU - Melinte, S.

AU - Grivei, E.

AU - Beuken, J. M.

AU - Mariage, G.

AU - Malcorps, L.

AU - Gustin, C.

AU - Bayot, V.

AU - Shayegan, M.

N1 - Funding Information: The authors are much indebted to N.R. Cooper, T. Jungwirth and S.P. Shukla for numerical calculations. This work has been supported by NATO grant CRG 950328 and the NSF MRSEC grant DMR-9809483. The work performed in Louvain-la-Neuve was carried out under financial support of the programme “PAI” sponsored by the “Communauté Française de Belgique”.

PY - 2000/2

Y1 - 2000/2

N2 - By controlling the ratio η between the Zeeman and Coulomb energies, the heat capacity of a multilayer two-dimensional electron system (2DES) is measured near Landau level filling ν = 1 at 60 mK. The data reveal the disappearance of the nuclear spin contribution of GaAs quantum wells to the heat capacity as η exceeds a critical value ηC≈0.04. This result is interpreted as the effect of the transition from Skyrmions to single electron spin flips at large Zeeman energy.

AB - By controlling the ratio η between the Zeeman and Coulomb energies, the heat capacity of a multilayer two-dimensional electron system (2DES) is measured near Landau level filling ν = 1 at 60 mK. The data reveal the disappearance of the nuclear spin contribution of GaAs quantum wells to the heat capacity as η exceeds a critical value ηC≈0.04. This result is interpreted as the effect of the transition from Skyrmions to single electron spin flips at large Zeeman energy.

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U2 - 10.1016/S1386-9477(99)00054-5

DO - 10.1016/S1386-9477(99)00054-5

M3 - Conference article

AN - SCOPUS:0034138728

SN - 1386-9477

VL - 6

SP - 52

EP - 55

JO - Physica E: Low-Dimensional Systems and Nanostructures

JF - Physica E: Low-Dimensional Systems and Nanostructures

IS - 1

T2 - 13th International Conference on the Electronic Properties of Two-Dimensional Systems (EP2DS-13)

Y2 - 1 August 1999 through 6 August 1999

ER -

Effect of Zeeman energy on heat capacity of GaAs/AlGaAs heterostructures near ν = 1

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