TY - JOUR
T1 - Tuning Spin Current Injection at Ferromagnet-Nonmagnet Interfaces by Molecular Design
AU - Wittmann, Angela
AU - Schweicher, Guillaume
AU - Broch, Katharina
AU - Novak, Jiri
AU - Lami, Vincent
AU - Cornil, David
AU - McNellis, Erik R.
AU - Zadvorna, Olga
AU - Venkateshvaran, Deepak
AU - Takimiya, Kazuo
AU - Geerts, Yves H.
AU - Cornil, Jérôme
AU - Vaynzof, Yana
AU - Sinova, Jairo
AU - Watanabe, Shun
AU - Sirringhaus, Henning
N1 - Funding Information:
The authors would like to thank S. Schott and K. Kang for fruitful discussions. The small molecules Ph-DNTT-Ph and -DNTT- were supplied by Nippon Kayaku. Funding from the Alexander von Humboldt Foundation, the European Research Council (ERC Synergy Grant SC2 No. 610115 and ERC Grant Agreement No. 714067, ENERGYMAPS) and MEYS of Czech Republic Projects No. LQ1601 and No. LM2015041 is acknowledged. V. L. and Y. V. thank the Junior Professor Program of the Baden-Wuerttemberg Ministry of Science, Research and Art for funding. G. S. acknowledges postdoctoral fellowship support from the Wiener-Anspach Foundation and The Leverhulme Trust (Early Career Fellowship supported by the Isaac Newton Trust). The work in Mons was supported by the Consortium des Équipements de Calcul Intensif (CÉCI), funded by the Fonds National de la Recherche Scientifique (F. R. S.-FNRS) under Grant No. 2.5020.11.
Publisher Copyright:
© 2020 American Physical Society.
PY - 2020/1/16
Y1 - 2020/1/16
N2 - There is a growing interest in utilizing the distinctive material properties of organic semiconductors for spintronic applications. Here, we explore the injection of pure spin current from Permalloy into a small molecule system based on dinaphtho[2,3-b:2,3-f]thieno[3,2-b]thiophene (DNTT) at ferromagnetic resonance. The unique tunability of organic materials by molecular design allows us to study the impact of interfacial properties on the spin injection efficiency systematically. We show that both the spin injection efficiency at the interface and the spin diffusion length can be tuned sensitively by the interfacial molecular structure and side chain substitution of the molecule.
AB - There is a growing interest in utilizing the distinctive material properties of organic semiconductors for spintronic applications. Here, we explore the injection of pure spin current from Permalloy into a small molecule system based on dinaphtho[2,3-b:2,3-f]thieno[3,2-b]thiophene (DNTT) at ferromagnetic resonance. The unique tunability of organic materials by molecular design allows us to study the impact of interfacial properties on the spin injection efficiency systematically. We show that both the spin injection efficiency at the interface and the spin diffusion length can be tuned sensitively by the interfacial molecular structure and side chain substitution of the molecule.
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U2 - 10.1103/PhysRevLett.124.027204
DO - 10.1103/PhysRevLett.124.027204
M3 - Article
C2 - 32004034
AN - SCOPUS:85078828493
SN - 0031-9007
VL - 124
JO - Physical Review Letters
JF - Physical Review Letters
IS - 2
M1 - 027204
ER -