Effect of molecular ordering on spin and charge injection in rubrene
Name
Raman-2009-Effect of molecular ordering on spin and charge injection in rubrene.pdf
Size
1.12 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Moodera, Jagadeesh
Shim, J. H.
Raman, K. V.
Chang, Joonyeon
Borchers, J. A.
Watson, S. M.
Date Issued
November 2009
Journal
Physical Review B
Publisher
American Physical Society
Citation
Raman, K. V. et al. “Effect of molecular ordering on spin and charge injection in rubrene.” Physical Review B 80.19 (2009): 195212. © 2009 The American Physical Society
Version
Final published version
Abstract
Studies have shown that interfaces play a crucial role for efficient spin injection and transport. Here, we address the complex role of interface in spin and charge injection into organic materials by various interface-sensitive characterization tools. Inelastic tunneling spectroscopy and polarized neutron reflectometry were mainly adopted to explore the interfaces of high mobility organic semiconductor rubrene sandwiched by two ferromagnetic electrodes. The dramatic difference in the reported magnetotransport properties and charge injection characteristics in trilayer magnetic junctions has been attributed to the different growth morphology of rubrene molecules at the interface dictated by the presence or absence of a 0.6 nm alumina seed layer. The magnetic contribution of the top ferromagnetic electrode is also influenced by the morphology of the rubrene layer underneath, directly affecting the spin injection efficiency. This work highlights the importance of interface engineering in the development of organic-based spintronics devices.
MIT Department
Francis Bitter Magnet Laboratory (Massachusetts Institute of Technology)
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
http://dx.doi.org/10.1103/PhysRevB.80.195212
