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

被引：28

作者：

Joshi, G. ^{[1
]}

Miller, R. ^{[1
]}

Ogden, L. ^{[1
]}

Kavand, M. ^{[1
]}

Jamali, S. ^{[1
]}

Ambal, K. ^{[1
]}

Venkatesh, S. ^{[2
]}

Schurig, D. ^{[2
]}

Malissa, H. ^{[1
]}

Lupton, J. M. ^{[1
,3
]}

Boehme, C. ^{[1
]}

机构：

[1] Univ Utah, Dept Phys & Astron, Salt Lake City, UT 84112 USA

[2] Univ Utah, Dept Elect & Comp Engn, Salt Lake City, UT 84112 USA

[3] Univ Regensburg, Inst Experimentelle & Angew Phys, D-93040 Regensburg, Germany

来源：

APPLIED PHYSICS LETTERS | 2016年 / 109卷 / 10期

关键词：

MAGNETORESISTANCE; RECOMBINATION;

D O I：

10.1063/1.4960158

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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 p-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. Published by AIP Publishing.

引用

页码：191 / 195

页数：5

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