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Title: Separating hyperfine from spin-orbit interactions in organic semiconductors by multi-octave magnetic resonance using coplanar waveguide microresonators

Abstract

Separating the influence of hyperfine from spin-orbit interactions in spin-dependent carrier recombination and dissociation processes necessitates magnetic resonance spectroscopy over a wide range of frequencies. We have designed compact and versatile coplanar waveguide resonators for continuous-wave electrically detected magnetic resonance and tested these on organic light-emitting diodes. By exploiting both the fundamental and higher-harmonic modes of the resonators, we cover almost five octaves in resonance frequency within a single setup. The measurements with a common π-conjugated polymer as the active material reveal small but non-negligible effects of spin-orbit interactions, which give rise to a broadening of the magnetic resonance spectrum with increasing frequency.

Authors:
; ; ; ; ; ; ;  [1]; ;  [2];  [1];  [3]
  1. Department of Physics and Astronomy, University of Utah, Salt Lake City, Utah 84112 (United States)
  2. Department of Electrical and Computer Engineering, University of Utah, Salt Lake City, Utah 84112 (United States)
  3. (Germany)
Publication Date:
OSTI Identifier:
22594299
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 109; Journal Issue: 10; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; LIGHT EMITTING DIODES; L-S COUPLING; MAGNETIC RESONANCE; ORGANIC SEMICONDUCTORS; POLYMERS; RECOMBINATION; RESONATORS; SPECTRA; SPECTROSCOPY; WAVEGUIDES

Citation Formats

Joshi, G., Miller, R., Ogden, L., Kavand, M., Jamali, S., Ambal, K., Malissa, H., Boehme, C., E-mail: boehme@physics.utah.edu, Venkatesh, S., Schurig, D., Lupton, J. M., and Institut für Experimentelle und Angewandte Physik, Universität Regensburg, D-93040 Regensburg. Separating hyperfine from spin-orbit interactions in organic semiconductors by multi-octave magnetic resonance using coplanar waveguide microresonators. United States: N. p., 2016. Web. doi:10.1063/1.4960158.
Joshi, G., Miller, R., Ogden, L., Kavand, M., Jamali, S., Ambal, K., Malissa, H., Boehme, C., E-mail: boehme@physics.utah.edu, Venkatesh, S., Schurig, D., Lupton, J. M., & Institut für Experimentelle und Angewandte Physik, Universität Regensburg, D-93040 Regensburg. Separating hyperfine from spin-orbit interactions in organic semiconductors by multi-octave magnetic resonance using coplanar waveguide microresonators. United States. doi:10.1063/1.4960158.
Joshi, G., Miller, R., Ogden, L., Kavand, M., Jamali, S., Ambal, K., Malissa, H., Boehme, C., E-mail: boehme@physics.utah.edu, Venkatesh, S., Schurig, D., Lupton, J. M., and Institut für Experimentelle und Angewandte Physik, Universität Regensburg, D-93040 Regensburg. Mon . "Separating hyperfine from spin-orbit interactions in organic semiconductors by multi-octave magnetic resonance using coplanar waveguide microresonators". United States. doi:10.1063/1.4960158.
@article{osti_22594299,
title = {Separating hyperfine from spin-orbit interactions in organic semiconductors by multi-octave magnetic resonance using coplanar waveguide microresonators},
author = {Joshi, G. and Miller, R. and Ogden, L. and Kavand, M. and Jamali, S. and Ambal, K. and Malissa, H. and Boehme, C., E-mail: boehme@physics.utah.edu and Venkatesh, S. and Schurig, D. and Lupton, J. M. and Institut für Experimentelle und Angewandte Physik, Universität Regensburg, D-93040 Regensburg},
abstractNote = {Separating the influence of hyperfine from spin-orbit interactions in spin-dependent carrier recombination and dissociation processes necessitates magnetic resonance spectroscopy over a wide range of frequencies. We have designed compact and versatile coplanar waveguide resonators for continuous-wave electrically detected magnetic resonance and tested these on organic light-emitting diodes. By exploiting both the fundamental and higher-harmonic modes of the resonators, we cover almost five octaves in resonance frequency within a single setup. The measurements with a common π-conjugated polymer as the active material reveal small but non-negligible effects of spin-orbit interactions, which give rise to a broadening of the magnetic resonance spectrum with increasing frequency.},
doi = {10.1063/1.4960158},
journal = {Applied Physics Letters},
number = 10,
volume = 109,
place = {United States},
year = {Mon Sep 05 00:00:00 EDT 2016},
month = {Mon Sep 05 00:00:00 EDT 2016}
}