NCTS (South)


DATE2014-03-06

TIME15:30

PLACER203, 2F, NCTS, NCKU

FIELDOther

SPEAKER Prof. Nicolae Atodiresei - Peter Grünberg Institut (PGI-1) and Institute for Advanced Simulation (IAS-1), Germany/ Dept. of Physics, University of Duisburg-Essen, Germany

TITLESpintronics with Organic Materials: A First Principle Perspective

ABSTRACTOrganic materials adsorbed on ferromagnetic surfaces offer the possibility to merge the concepts of organic electronics with spintronics in order to build future nanoscale data storage, sensing and computing multifunctional devices. Therefore, the ability to reliably describe the electronic properties of carbon-based materials adsorbed on magnetic surfaces is essential to understand and assist how to engineer specific functionalities in hybrid spintronic devices. Density functional theory studies can be used to understand how to tailor the magnetic properties of hybrid organic-ferromagnetic interfaces by adsorbing organic materials containing π-electrons onto several magnetic substrates. For such hybrid systems, the magnetic properties like molecular magnetic moments and their spatial orientation, spin-polarization and the magnetic exchange coupling can be specifically tuned by an appropriate choice of the organic material. Ultimately, this allows us to precisely engineer the magnetic properties of the hybrid organic-ferromagnetic interfaces, which can be further exploited to design more efficient spintronic devices based on organic materials. References: [1] Nature 2013, 493 (509), “Interface engineered templates for molecular spin memory and sensor devices”, Raman, K. V.; Kamerbeek, A. M.; Atodiresei, N.; Mukherjee, A.; Sen, T. K.; Lazic, P.; Caciuc, V.; Michel, R.; Stalke, D.; Mandal, S. K.; Blügel, S.; Munzenberg, M.; Moodera, J. S. [2] Nature Communications 2013, 4 (2772), “The mechanism of caesium intercalation of graphene”, Petrovic, M.; Šrut, I.; Runte, S.; Busse, C.; Sadowski, J. T.; Lazic, P.; Pletikosic, I.; Pan, Z.-H.; Milun, M.; Pervan, P.; Atodiresei, N.; Brako, R.; Šokcevic, D.; Valla, T.; Michely, T.; Kralj, M. [3] Nature Communications 2013, 4 (2425), “Hands-on 4f-states via scanning tunneling microscopy”, Fahrendorf, S.; Atodiresei, N.; Besson, C.; Caciuc, V.; Matthes, M.; Blügel, S.; Kögerler, P.; Bürgler, E. D.; Schneider, M. C. [4] Physical Review Letters 2013, 111 (106805), “Magnetic Hardening Induced by Nonmagnetic Organic Molecules”, Callsen, M.; Caciuc, V.; Kiselev, N.; Atodiresei, N.; Blügel, S. [5] Physical Review B 2013, 87 (041403), “Atomic-scale magnetism of cobalt-intercalated graphene”, Decker, R.; Brede, J.; Atodiresei, N.; Caciuc, V.; Blügel, S.; Wiesendanger, R. [6] Physical Review Letters 2011, 107 (036101), “Graphene on Ir(111): physisorption with chemical modulation”, Busse, C.; Lazic, P.; Djemour, R.; Coraux, J.; Gerber, T.; Atodiresei, N; Caciuc, V.; Brako, R.; N'Diaye, Alpha T.; Blügel, S.; Zegenhagen, J.; Michely, T. [7] Physical Review Letters 2010, 105 (066601), “Design of the local spin polarization at the organicferromagnetic interface”, Atodiresei, N.; Brede, J.; Lazic, P.; Caciuc, V.; Hoffmann, G.; Wiesendanger, R.; Blügel, S. [8] Physical Review Letters 2010, 105 (047204), “Spin- and energy-dependent tunneling through a single molecule with intramolecular spatial resolution”, Brede, J.; Atodiresei, N.; Kuck, S.; Lazic, P.; Caciuc, V.; Morikawa, Y.; Hoffmann, G.; Blügel, S.; Wiesendanger R. [9] Physical Review Letters 2009, 102 (136809), “Chemical versus van der Waals Interaction: the role of the heteroatom in the flat adsorption of aromatic molecules as C6H6, C5NH5 and C4N2H4 on the Cu(110) surface”, Atodiresei, N.; Caciuc, V.; Lazic, P.; Blügel, S. [10] Physical Review Letters 2008, 100 (117207), “Controlling the magnetization direction in molecules via their oxidation state”, Atodiresei, N.; Dederichs, P. H.; Mokrousov, Y.; Bergqvist, L.; Bihlmayer, G.; Blügel, S.