title: Evidence for skyrmion crystallization from NMR relaxation experiments.
abstract: A resistively detected NMR technique was used to probe the two-dimensional electron gas in a GaAs/AlGaAs quantum well. The spin-lattice relaxation rate (1/T(1)) was extracted at near complete filling of the first Landau level by electrons. The nuclear spin of (75)As is found to relax much more efficiently with T --> 0 and when a well developed quantum Hall state with R(xx) approximately 0 occurs. The data show a remarkable correlation between the nuclear spin relaxation and localization. This suggests that the magnetic ground state near complete filling of the first Landau level may contain a lattice of topological spin texture, i.e., a Skyrmion crystal.
authors.affiliation: Department of Physics, Columbia University, New York, New York 10027 USA.
authors.forename: G
authors.initials: G
authors.lastname: Gervais
authors.forename: H L
authors.initials: HL
authors.lastname: Stormer
authors.forename: D C
authors.initials: DC
authors.lastname: Tsui
authors.forename: P L
authors.initials: PL
authors.lastname: Kuhns
authors.forename: W G
authors.initials: WG
authors.lastname: Moulton
authors.forename: A P
authors.initials: AP
authors.lastname: Reyes
authors.forename: L N
authors.initials: LN
authors.lastname: Pfeiffer
authors.forename: K W
authors.initials: KW
authors.lastname: Baldwin
authors.forename: K W
authors.initials: KW
authors.lastname: West