Large magnetoresistance in nonmagnetic π-conjugated semiconductor thin film devices

Ö Mermer, G. Veeraraghavan, T. L. Francis, Y. Sheng, D. T. Nguyen, M. Wohlgenannt*, A. Köhler, M. K. Al-Suti, M. S. Khan

*المؤلف المقابل لهذا العمل

نتاج البحث: المساهمة في مجلةArticleمراجعة النظراء

374 اقتباسات (Scopus)


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.

اللغة الأصليةEnglish
رقم المقال205202
دوريةPhysical Review B - Condensed Matter and Materials Physics
مستوى الصوت72
رقم الإصدار20
المعرِّفات الرقمية للأشياء
حالة النشرPublished - نوفمبر 15 2005

ASJC Scopus subject areas

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