Journal article
Large magnetoresistance in nonmagnetic π-conjugated semiconductor thin film devices
Physical review. B, Condensed matter and materials physics, Vol.72(20), pp.205202.1-205202.12
11/01/2005
DOI: 10.1103/PhysRevB.72.205202
Abstract
Following the recent observation of large magnetoresistance at room temperature in polyfluorene sandwich devices, we have performed a comprehensive magnetoresistance study on a set of organic semiconductor sandwich devices made from different π-conjugated polymers and small molecules. The study includes a range of materials that show greatly different chemical structure, mobility, and spin-orbit coupling strength. We study both hole and electron transporters at temperatures ranging from 10 K to 300 K. We observe large negative or positive magnetoresistance (up to 10% at 300 K and 10 mT) depending on material and device operating conditions. We discuss our results in the framework of known magnetoresistance mechanisms and find that none of the existing models can explain our results. © 2005 The American Physical Society.
Details
- Title: Subtitle
- Large magnetoresistance in nonmagnetic π-conjugated semiconductor thin film devices
- Creators
- Ö Mermer - University of IowaG Veeraraghavan - University of IowaT. L Francis - University of IowaY Sheng - Department of Physics and Astronomy, The University of Iowa, Iowa City, Iowa 52242-1479, United StatesD. T Nguyen - University of IowaM Wohlgenannt - University of IowaA Köhler - University of PotsdamM. K AL-SUTI - Sultan Qaboos UniversityM. S Khan - Sultan Qaboos University
- Resource Type
- Journal article
- Publication Details
- Physical review. B, Condensed matter and materials physics, Vol.72(20), pp.205202.1-205202.12
- DOI
- 10.1103/PhysRevB.72.205202
- ISSN
- 1098-0121
- eISSN
- 1550-235X
- Publisher
- American Physical Society
- Language
- English
- Date published
- 11/01/2005
- Academic Unit
- IIHR--Hydroscience and Engineering; Physics and Astronomy
- Record Identifier
- 9984428806502771
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