Effectiveness of organic molecules for spin filtering in an organic spin valve: Reaction-induced spin polarization for Co atop Alq3

Tu Ngoc Lam, Yu Ling Lai, Chih Han Chen, Po Hung Chen, Yuet Loy Chan, Der Hsin Wei, Hong Ji Lin, C. T. Chen, Jeng Han Wang, Jeng Tzong Sheu, Yao Jane Hsu

研究成果: 雜誌貢獻文章

15 引文 斯高帕斯(Scopus)

摘要

The spin polarization of organic-ferromagnetic interfaces in an organic spin valve critically affects the efficiency of spin injection or detection. We examined the chemical and electronic properties of ferromagnetic Co deposited on organic Alq3 and the interfacial spin-polarized capability of the electronic states. Our x-ray photoemission spectra and calculations with density-functional theory indicate a sequential and unequal distribution of charge from Co clusters to N and then to O atoms in Alq3. The preferential orbital hybridization at specific functional sites produces efficient spin polarization of organic molecules. Element-specific measurements of x-ray magnetic circular dichroism demonstrate the preferential spin polarization in the lowest unoccupied molecular orbital state of N atoms at the complex interface for Co atop Alq3, which agrees satisfactorily with calculation. Our results indicate that an induced interfacial spin polarization on engineering the dominant reaction of Co with mainly N and O atoms in Alq3 might pave a way for effective spin filtering in organic spintronics.

原文英語
文章編號041204
期刊Physical Review B - Condensed Matter and Materials Physics
91
發行號4
DOIs
出版狀態已發佈 - 2015 一月 21

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

指紋 深入研究「Effectiveness of organic molecules for spin filtering in an organic spin valve: Reaction-induced spin polarization for Co atop Alq3」主題。共同形成了獨特的指紋。

  • 引用此