title: Dynamic nuclear polarization and nuclear magnetic resonance in the vicinity of edge states of a 2DES in GaAs quantum wells.
abstract: Nuclear magnetic resonance is detected via the in-plane conductivity of a two-dimensional electron system at unity Landau level filling factor in the regime of the quantum Hall effect in narrow and wide quantum wells. The NMR is spatially selective to nuclei with a coupling to electrons in the current carrying edge states at the perimeter of the 2DES. Interpretation of the electron-nuclear double resonance signals is facilitated by numerical simulations. A new RF swept method for conductivity-detected NMR is introduced which offers more efficient signal averaging. The method is applied to the study of electric quadrupole interactions, weakly allowed overtone transitions, and evaluation of the extent of electron wave function delocalization in the wide quantum well.
authors.affiliation: Department of Chemistry, National High Magnetic Field Laboratory, University of Florida, Gainesville, Florida 32611-7200, USA. cliff.bowers@gmail.com
authors.forename: Clifford R
authors.initials: CR
authors.lastname: Bowers
authors.forename: Joshua D
authors.initials: JD
authors.lastname: Caldwell
authors.forename: Guennadi
authors.initials: G
authors.lastname: Gusev
authors.forename: Alexey E
authors.initials: AE
authors.lastname: Kovalev
authors.forename: Eugene
authors.initials: E
authors.lastname: Olshanetsky
authors.forename: John L
authors.initials: JL
authors.lastname: Reno
authors.forename: Jerry A
authors.initials: JA
authors.lastname: Simmons
authors.forename: Sergey A
authors.initials: SA
authors.lastname: Vitkalov
mesh_terms: D000465:Algorithms; D001152:Arsenicals / Q000032:analysis* / Q000737:chemistry*; D003198:Computer Simulation; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005708:Gallium / Q000032:analysis* / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000295:instrumentation* / Q000379:methods*; D008956:Models, Chemical; D011789:Quantum Theory; D012666:Semiconductors
chemical_list: D001152:Arsenicals; C043055:gallium arsenide; D005708:Gallium