Tennahewa, Taniya H. and Hosseinzadeh, S. and Atwood, S. I. and Popli, H. and Malissa, H. and Lupton, J. M. and Boehme, C. (2024) Coherent and incoherent spin-relaxation dynamics of electron-hole pairs in a π-conjugated polymer at low magnetic fields. PHYSICAL REVIEW B, 109 (7): 075303. ISSN 2469-9950, 2469-9969
Full text not available from this repository.Abstract
We report room -temperature measurements of the spin -relaxation times T1 and T2 of electron -hole chargecarrier spins in an organic light -emitting diode based on the pi -conjugated polymer SY-PPV at low (1 mT <= B0 <= 10 mT) static magnetic fields, using electrically detected-through spin-Rabi oscillation -controlled recombination currents-magnetic resonant Hahn -echo and inversion -recovery pulse sequences. When random local hyperfine fields and external magnetic fields compete in magnitude, charge carrier spin -quantization axes are no longer well defined, and striking magnetic -field dependencies of spin -lattice relaxation times are found, while spin coherence times remain mostly field -independent. These results corroborate the magnetic -field sensitivities of observables governed by radical -pair physics.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | MAGNETORECEPTION; BIRDS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Lupton > Group John Lupton |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Oct 2025 06:30 |
| Last Modified: | 14 Oct 2025 06:30 |
| URI: | https://pred.uni-regensburg.de/id/eprint/64561 |
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