title: Organic electronics. Room-temperature coupling between electrical current and nuclear spins in OLEDs.
abstract: The effects of external magnetic fields on the electrical conductivity of organic semiconductors have been attributed to hyperfine coupling of the spins of the charge carriers and hydrogen nuclei. We studied this coupling directly by implementation of pulsed electrically detected nuclear magnetic resonance spectroscopy in organic light-emitting diodes (OLEDs). The data revealed a fingerprint of the isotope (protium or deuterium) involved in the coherent spin precession observed in spin-echo envelope modulation. Furthermore, resonant control of the electric current by nuclear spin orientation was achieved with radiofrequency pulses in a double-resonance scheme, implying current control on energy scales one-millionth the magnitude of the thermal energy.
authors.affiliation: Department of Physics and Astronomy, University of Utah, Salt Lake City, UT 84112, USA. hmalissa@physics.utah.edu john.lupton@ur.de boehme@physics.utah.edu.
authors.forename: H
authors.initials: H
authors.lastname: Malissa
authors.affiliation: Department of Physics and Astronomy, University of Utah, Salt Lake City, UT 84112, USA.
authors.forename: M
authors.initials: M
authors.lastname: Kavand
authors.affiliation: Department of Physics and Astronomy, University of Utah, Salt Lake City, UT 84112, USA.
authors.forename: D P
authors.initials: DP
authors.lastname: Waters
authors.affiliation: Department of Physics and Astronomy, University of Utah, Salt Lake City, UT 84112, USA.
authors.forename: K J
authors.initials: KJ
authors.lastname: van Schooten
authors.affiliation: Centre for Organic Photonics & Electronics, School of Chemistry and Molecular Biosciences, The University of Queensland, Queensland 4072, Australia.
authors.forename: P L
authors.initials: PL
authors.lastname: Burn
authors.affiliation: Department of Physics and Astronomy, University of Utah, Salt Lake City, UT 84112, USA.
authors.forename: Z V
authors.initials: ZV
authors.lastname: Vardeny
authors.affiliation: Department of Physics and Astronomy, University of Utah, Salt Lake City, UT 84112, USA.
authors.forename: B
authors.initials: B
authors.lastname: Saam
authors.affiliation: Department of Physics and Astronomy, University of Utah, Salt Lake City, UT 84112, USA. Institut für Experimentelle und Angewandte Physik, Universität Regensburg, 93053 Regensburg, Germany. hmalissa@physics.utah.edu john.lupton@ur.de boehme@physics.utah.edu.
authors.forename: J M
authors.initials: JM
authors.lastname: Lupton
authors.affiliation: Department of Physics and Astronomy, University of Utah, Salt Lake City, UT 84112, USA. hmalissa@physics.utah.edu john.lupton@ur.de boehme@physics.utah.edu.
authors.forename: C
authors.initials: C
authors.lastname: Boehme