title: Nuclear double resonance between statistical spin polarizations.
abstract: We demonstrate nuclear double resonance for nanometer-scale volumes of spins where random fluctuations rather than Boltzmann polarization dominate. When the Hartmann-Hahn condition is met in a cross-polarization experiment, flip-flops occur between two species of spins and their fluctuations become coupled. We use magnetic resonance force microscopy to measure this effect between 1H and 13C spins in 13C-enriched stearic acid. The development of a cross-polarization technique for statistical ensembles adds an important tool for generating chemical contrast in nanometer-scale magnetic resonance.
authors.affiliation: IBM Research Division, Almaden Research Center, 650 Harry Road, San Jose, California 95120, USA.
authors.forename: M
authors.initials: M
authors.lastname: Poggio
authors.forename: H J
authors.initials: HJ
authors.lastname: Mamin
authors.forename: C L
authors.initials: CL
authors.lastname: Degen
authors.forename: M H
authors.initials: MH
authors.lastname: Sherwood
authors.forename: D
authors.initials: D
authors.lastname: Rugar