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Title: Effects of spin doping and spin injection in the luminescence and vibrational spectrum of C{sub 60}

We have studied the Raman spectrum and photoemission of hybrid magneto-fullerene devices. For C{sub 60} layers on cobalt, the spin polarized electron transfer shifts the photoemission energy, reducing the zero phonon contribution. The total luminescence of hybrid devices can be controlled via spin injection from magnetic electrodes, with changes of the order of 10%–20% at room temperature. Spin polarised currents alter as well the Raman spectrum of the molecules, enhancing some modes by a factor 5 while shifting others by several wavenumbers due to a spin-dependent hopping time and/or enhanced intermolecular interactions. These results can be used to measure spin polarisation in molecules or to fabricate magneto-optic and magneto-vibrational devices.
Authors:
; ; ; ; ; ;  [1] ; ;  [2]
  1. School of Physics and Astronomy, University of Leeds, LS2 9JT W. Yorkshire (United Kingdom)
  2. Department of Physics, University of York, YO10 5DD N. Yorkshire (United Kingdom)
Publication Date:
OSTI Identifier:
22311087
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 2; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ELECTRODES; ELECTRON TRANSFER; FULLERENES; HYBRID SYSTEMS; INJECTION; INTERACTIONS; LAYERS; LUMINESCENCE; MAGNETIC PROPERTIES; MAGNETO-OPTICAL EFFECTS; MOLECULES; OSCILLATIONS; PHOTOEMISSION; POLARIZATION; RAMAN SPECTRA; SPIN; SPIN ORIENTATION; TEMPERATURE RANGE 0273-0400 K