Separating hyperfine from spin-orbit interactions in organic semiconductors by multi-octave magnetic resonance using coplanar waveguide microresonators
- Univ. of Utah, Salt Lake City, UT (United States). Dept. of Physics and Astronomy
- Univ. of Utah, Salt Lake City, UT (United States). Dept. of Electrical and Computer Engineering
- Univ. of Utah, Salt Lake City, UT (United States). Dept. of Physics and Astronomy; Univ. of Regensburg (Germany). Inst. of Experimental and Applied Physics
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. For this, 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.
- Research Organization:
- Univ. of Utah, Salt Lake City, UT (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
- Grant/Contract Number:
- SC0000909; 1121252
- OSTI ID:
- 1467861
- Alternate ID(s):
- OSTI ID: 1321033
- Journal Information:
- Applied Physics Letters, Vol. 109, Issue 10; ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Similar Records
Multi-frequency spin manipulation using rapidly tunable superconducting coplanar waveguide microresonators
Observing electron spin resonance between 0.1 and 67 GHz at temperatures between 50 mK and 300 K using broadband metallic coplanar waveguides