idw – Informationsdienst Wissenschaft
Nachrichten, Termine, Experten
Nachrichten, Termine, Experten
idw - Informationsdienst
Wissenschaft
01/23/2014 - 01/23/2014 | Greifswald
Abstract: Spinelectronics is exploiting the spin degree of freedom for novel information technology or devices. In my talk I will present future directions. These new ideas pave the way for low energy consumption, nanometer-scale building blocks for spin-based computing, bridging timescales towards a THz spintronics. I will focus on two recent aspects of our research on organic materials and ultrafast excitation: (i) Delocalized carbon based radical species, formed by the fusion of three benzene rings, belong to the class of open-shell systems and carry a spin. A spin-filter device is formed at the interface to a ferromagnet with 20% magnetoresistance effect near room temperature, demonstrating the use of such molecules as templates to engineer organic spin-filter barriers and quantum registers storing a single spin. (ii) New techniques for the detection of ultrafast spin-currents have to be developed to bring spin-based information technology to ultrafast time scales. The spin-current bunches launched from a ferromagnet can be converted to picosecond charge currents. They can be quantitatively determined via THz emission. The pulses can be shaped and manipulated in frequency.
[1] T. Kampfrath, M. Battiato, P. Maldonado, G. Eilers, J. Nötzold, S. Mährlein, V. Zbarskyy, F. Freimuth, Y. Mokrousov, S. Blügel, M. Wolf, I. Radu, P. M. Oppeneer, M. Münzenberg, Terahertz spin current pulses controlled by magnetic heterostructures, Nature Nanotechnology 8, 256 (2013). [2] K. V. Raman, A. M. Kamerbeek, A. Mukherjee, N. Atodiresei, T. K. Sen, P. Lazić, V. Caciuc, R. Michel, D. Stalke, S. K. Mandal, S. Blügel, M. Münzenberg, J. S. Moodera, Interface-engineered templates for molecular spin memory devices, Nature 493, 509 (2013)
Information on participating / attending:
Organisation: Prof. H. Fehske, Prof. L. Schweikhard
Kontakt: Institut für Physik, Felix-Hausdorff-Straße 6,
Tel. 03834 86-4700, info@physik.uni-greifswald.de
Date:
01/23/2014 17:00 - 01/23/2014 18:00
Event venue:
Hörsaal, Institut für Physik
Felix-Hausdorff-Straße 6
17489 Greifswald
Mecklenburg-Vorpommern
Germany
Target group:
Scientists and scholars, Students
Relevance:
regional
Subject areas:
Physics / astronomy
Types of events:
Presentation / colloquium / lecture
Entry:
12/02/2013
Sender/author:
Sabine Köditz
Department:
Presse- und Informationsstelle
Event is free:
no
Language of the text:
German
URL of this event: http://idw-online.de/en/event45723
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