title: Resistively detected nuclear magnetic resonance in n- and p-type GaAs quantum point contacts.
abstract: We present resistively detected NMR measurements in induced and modulation-doped electron quantum point contacts, as well as induced hole quantum point contacts. While the magnitude of the resistance change and associated NMR peaks in n-type devices is in line with other recent measurements using this technique, the effect in p-type devices is too small to measure. This suggests that the hyperfine coupling between holes and nuclei in this type of device is much smaller than the electron hyperfine coupling, which could have implications in quantum information processing.
authors.affiliation: School of Physics, University of New South Wales, Sydney, NSW 2052, Australia. z.keane@unsw.edu.au
authors.forename: Z K
authors.initials: ZK
authors.lastname: Keane
authors.forename: M C
authors.initials: MC
authors.lastname: Godfrey
authors.forename: J C H
authors.initials: JC
authors.lastname: Chen
authors.forename: S
authors.initials: S
authors.lastname: Fricke
authors.forename: O
authors.initials: O
authors.lastname: Klochan
authors.forename: A M
authors.initials: AM
authors.lastname: Burke
authors.forename: A P
authors.initials: AP
authors.lastname: Micolich
authors.forename: H E
authors.initials: HE
authors.lastname: Beere
authors.forename: D A
authors.initials: DA
authors.lastname: Ritchie
authors.forename: K V
authors.initials: KV
authors.lastname: Trunov
authors.forename: D
authors.initials: D
authors.lastname: Reuter
authors.forename: A D
authors.initials: AD
authors.lastname: Wieck
authors.forename: A R
authors.initials: AR
authors.lastname: Hamilton