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Critical behavior of nuclear-spin diffusion in GaAs/AlGaAs heterostructures near Landau level filling nu = 1.

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Bayot, Vincent [UCL] Grivei, E. Beuken, Jean-Michel [UCL] Melinte, Sorin [UCL] Shayegan, M.

Thermal measurements on a GaAs/AlGaAs heterostructure reveal that the state of the confined two-dimensional electrons profoundly affects the nuclear-spin diffusion near Landau level filling factor v = 1. The experiments provide quantitative evidence that a dramatic enhancement of nuclear-spin diffusion from the GaAs quantum wells into the AlGaAs barriers is responsible for the recently reported sharp peak in the temperature dependence of heat capacity near v = 1. We discuss the physical origin of this behavior in terms of the possible Skyrme solid-liquid phase transition.

Document type Article de périodique (Journal article) – Article de recherche
Publication date 1997
Language Anglais
Journal information "Physical Review Letters" - Vol. 79, no. 9, p. 1718-1721 (1997)
Peer reviewed yes
Publisher American Physical Soc (College Pk)
issn 0031-9007
e-issn 1079-7114
Publication status Publié
Affiliation UCL - Autre
Links
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Bibliographic reference Bayot, Vincent ; Grivei, E. ; Beuken, Jean-Michel ; Melinte, Sorin ; Shayegan, M.. Critical behavior of nuclear-spin diffusion in GaAs/AlGaAs heterostructures near Landau level filling nu = 1.. In: Physical Review Letters, Vol. 79, no. 9, p. 1718-1721 (1997)
Permanent URL http://hdl.handle.net/2078.1/46068