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PGI Colloquium:

Prof. Dr. Mirko Cinchetti,
TU Dortmund University, Germany
 

PGI Lecture Hall, Building 04.8, 2nd Floor, Room 365

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02 Feb 2018 11:00

Towards the Coherent Control of Nano-Scale Hybrid Units

CincettiCopyright: Prof. Dr. Cinchetti

The miniaturization trend in the semiconductor industry has led to the understanding that interfacial properties are crucial for device behaviour. Spintronics has not been alien to this trend, and phenomena such as preferential spin tunnelling, the spin-to- charge conversion due to the Rashba–Edelstein effect and the spin–momentum locking at the surface of topological insulators have arisen mainly from emergent interfacial properties, rather than the bulk of the constituent materials.

In this talk I will describe inorganic/molecular interfaces by looking closely at both sides of the interface. I will discuss recent developments in the field and underline how molecular materials have arisen as an ideal platform for creating interfacial spin effects [1].

As an example, I will show that the extreme multi-functionality of organic molecules can be used to functionalize the spin properties of surfaces with a spin-texture induced by strong spin-orbit coupling. I will present our results on the following two-dimensional electronic systems: the surface states of the topological insulator Bi2Se3 [2], and the Rashba-split surface states of a Pb-Ag surface alloy [3].

Finally, I will discuss the key role that molecular interfaces may play in the development of a new generation of spin-based technologies, thanks to their unique capability of being actively tuned to reach as-yet unexplored functionalities. For example, I will show how the nano-scale object that naturally forms when an organic molecule is hybridized on a metallic surface (a nano-scale hybrid unit) could be used to achieve coherent control — at the molecular scale — of technologically important parameters, such as magnetization, plasmonic resonances, and spin texture.

[1] M. Cinchetti, A. Dediu, L. Hueso. Nature Materials 16, 507-515 (2017)

[2] S. Jakobs, A. Narayan, B. Stadtmüller, A. Droghetti, I. Rungger, Y. S. Hor, S. Klyatskaya, D. Jungkenn, J. Stöckl,    M. Laux, O. L. A. Monti, M. Aeschlimann, R. J. Cava, M. Ruben, S. Mathias, S. Sanvito and M. Cinchetti. Nano Letters 15, 6022 (2015);

[3] B. Stadmüller, J. Seidel, N. Haag, L. Grad, C. Tusche, G. van Straaten, M. Franke, J. Kirschner, C. Kumpf, M. Cinchetti and M. Aeschlimann. Physical Review Letters 117, 096805 (2016);


Contact

Jun.-Prof. Dr. Martina Müller
Phone: +49 2461 61-4831
Fax: +49 2461 61-2620
email: mart.mueller@fz-juelich.de

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