Large magnetoresistance in nonmagnetic π-conjugated semiconductor thin film devices

Title data

Mermer, Ö. ; Veeraraghavan, G. ; Francis, T. L. ; Sheng, Y. ; Nguyen, D. T. ; Wohlgenannt, M. ; Köhler, Anna ; Al-Suti, Mohammed K. ; Khan, Muhammad S.:
Large magnetoresistance in nonmagnetic π-conjugated semiconductor thin film devices.
In: Physical Review B. Vol. 72 (2005) Issue 20 . - 205202.
ISSN 0163-1829
DOI: https://doi.org/10.1103/PhysRevB.72.205202

Official URL:

Abstract in another language

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.

Further data

Item Type:	Article in a journal
Refereed:	No
Institutions of the University:	Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics II - Optoelectronics of Soft Matter > Chair Experimental Physics II - Optoelectronics of Soft Matter - Univ.-Prof. Dr. Anna Köhler Faculties Faculties > Faculty of Mathematics, Physics und Computer Science Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics II - Optoelectronics of Soft Matter
Result of work at the UBT:	No
DDC Subjects:	500 Science > 530 Physics
Date Deposited:	10 Mar 2015 12:55
Last Modified:	04 Aug 2023 10:29
URI:	https://eref.uni-bayreuth.de/id/eprint/7981