Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Computing with molecules: a big step in molecular spintronics

30.12.2019

International research team lead by Kiel University developed more stable spin states

Spintronics or spin electronics in contrast to conventional electronics uses the spin of electrons for sensing, information storage, transport, and processing. Potential advantages are nonvolatility, increased data processing speed, decreased electric power consumption, and higher integration densities compared to conventional semiconductor devices.


Each molecule can be separately addressed with a scanning tunneling microscope and switched between the states by applying a positive or negative voltage.

© Jan-Simon von Glasenapp and Rainer Herges


The new molecule has three properties. Only two combinations of these properties are stable. Switched between the different states is achieved by applying tiny tunneling currents.

© Rainer Herges

Molecular spintronics aims for the ultimate step towards miniaturization of spintronics by striving to actively control the spin states of individual molecules. Chemists and physicists at Kiel University joined forces with colleagues from France, and Switzerland to design, deposit and operate single molecular spin switches on surfaces.

The newly developed molecules feature stable spin states and do not lose their functionality upon adsorption on surfaces. They present their results in the current issue of the renowned journal Nature Nanotechnology.

The spin states of the new compounds are stable for at least several days. "This is achieved by a design trick that resembles the fundamental electronic circuits in computers, the so-called flip-flops. Bistability or switching between 0 and 1 is realized by looping the output signal back to the input", says experimental physicist Dr. Manuel Gruber from Kiel University.

The new molecules have three properties that are coupled with each other in such a feedback loop: their shape (planar or flat), the proximity of two subunits, called coordination (yes or no), and the spin state (high-spin or low-spin). Thus, the molecules are locked either in one or the other state. Upon sublimation and deposition on a silver surface, the switches self-assemble into highly ordered arrays. Each molecule in such an array can be separately addressed with a scanning tunneling microscope and switched between the states by applying a positive or negative voltage.

„Our new spin switch realizes in just one molecule what takes several components like transistors and resistors in conventional electronics. That’s a big step towards further miniaturisation", Dr. Manuel Gruber und organic chemist Prof. Dr. Rainer Herges explain. The next step will be to increase the complexity of the compounds to implement more sophisticated operations.

Molecules are the smallest constructions that can be designed and built with atomic precision and predictable properties. Their response to electrical or optical stimuli and their custom-designed chemical and physical functionality make them unique candidates to develop new classes of devices such as controllable surface catalysts or optical devices.

Original publication:
Alexander Köbke, Florian Gutzeit, Fynn Röhricht, Alexander Schlimm, Jan Grunwald, Felix Tuczek, Michal Studniarek, Danilo Longo, Fadi Choueikani, Edwige Otero, Philippe Ohresser, Sebastian Rohlf, Sven Johannsen, Florian Diekmann, Kai Rossnagel, Alexander Weismann, Torben Jasper-Toennies, Christian Näther, Rainer Herges, Richard Berndt, Manuel Gruber, Reversible coordination-induced spin-state switching in complexes on metal surfaces, Nature Nanotechnology (2019), DOI: 10.1038/s41565-019-0594-8
https://www.nature.com/articles/s41565-019-0594-8

Pictures for Download:
https://www.uni-kiel.de/de/pressemitteilungen/2019/414-spintronik-1.jpg
Caption: Each molecule can be separately addressed with a scanning tunneling microscope and switched between the states by applying a positive or negative voltage.
© Jan-Simon von Glasenapp and Rainer Herges

https://www.uni-kiel.de/de/pressemitteilungen/2019/414-spintronik-2.jpg
Caption: The new molecule has three properties. Only two combinations of these properties are stable. Switched between the different states is achieved by applying tiny tunneling currents.
© Rainer Herges

Kontakt:
Prof. Dr. Rainer Herges
Otto Diels Institute of Organic Chemistry
Tel. +49 (0)431 880 2440
Mail: rherges@oc.uni-kiel.de
Web: https://www.otto-diels-institut.de/en/otto-diels-institute-of-organic-chemistry

Dr. rer. nat. Manuel Gruber
Oberflächenphysik
Tel. +49 (0)431 880 5091
Mail: gruber@physik.uni-kiel.de
Web: http://www.ieap.uni-kiel.de/surface

The project was supported by CRC 677 „Function by Switching“, which was funded in the period 2007-2019 by the German Research Foundation at CAU in Kiel.

More information about research area KiNSIS
Details, which are only a millionth of a millimetre in size: this is what the priority research area "Kiel Nano, Surface and Interface Science – KiNSIS" at Kiel University has been working on. In the nano-cosmos, different laws prevail than in the macroscopic world - those of quantum physics. Through intensive, interdisciplinary cooperation between physics, chemistry, engineering and life sciences, the priority research area aims to understand the systems in this dimension and to implement the findings in an application-oriented manner. Molecular machines, innovative sensors, bionic materials, quantum computers, advanced therapies and much more could be the result. More information at www.kinsis.uni-kiel.de

Christian-Albrechts-Universität zu Kiel
Presse, Kommunikation und Marketing, Dr. Boris Pawlowski
Postanschrift: D-24098 Kiel, Telefon: (0431) 880-2104, Telefax: (0431) 880-1355
E-Mail: presse@uv.uni-kiel.de Internet: www.uni-kiel.de Twitter: www.twitter.com/kieluni
Facebook: www.facebook.com/kieluni Instagram: www.instagram.com/kieluni

Wissenschaftliche Ansprechpartner:

Prof. Dr. Rainer Herges
Otto Diels Institute of Organic Chemistry
Tel. +49 (0)431 880 2440
Mail: rherges@oc.uni-kiel.de
Web: https://www.otto-diels-institut.de/en/otto-diels-institute-of-organic-chemistry

Dr. rer. nat. Manuel Gruber
Surface Physics
Tel. +49 (0)431 880 5091
Mail: gruber@physik.uni-kiel.de
Web: http://www.ieap.uni-kiel.de/surface

Originalpublikation:

Alexander Köbke, Florian Gutzeit, Fynn Röhricht, Alexander Schlimm, Jan Grunwald, Felix Tuczek, Michal Studniarek, Danilo Longo, Fadi Choueikani, Edwige Otero, Philippe Ohresser, Sebastian Rohlf, Sven Johannsen, Florian Diekmann, Kai Rossnagel, Alexander Weismann, Torben Jasper-Toennies, Christian Näther, Rainer Herges, Richard Berndt, Manuel Gruber, Reversible coordination-induced spin-state switching in complexes on metal surfaces, Nature Nanotechnology (2019), DOI: 10.1038/s41565-019-0594-8
https://www.nature.com/articles/s41565-019-0594-8

Weitere Informationen:

https://www.uni-kiel.de/en/details/news/414-spintronik

Dr. Boris Pawlowski | Christian-Albrechts-Universität zu Kiel

More articles from Life Sciences:

nachricht Identifying the blind spots of soil biodiversity
04.08.2020 | Deutsches Zentrum für integrative Biodiversitätsforschung (iDiv) Halle-Jena-Leipzig

nachricht AI & single-cell genomics
04.08.2020 | Helmholtz Zentrum München - German Research Center for Environmental Health

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: AI & single-cell genomics

New software predicts cell fate

Traditional single-cell sequencing methods help to reveal insights about cellular differences and functions - but they do this with static snapshots only...

Im Focus: TU Graz Researchers synthesize nanoparticles tailored for special applications

“Core-shell” clusters pave the way for new efficient nanomaterials that make catalysts, magnetic and laser sensors or measuring devices for detecting electromagnetic radiation more efficient.

Whether in innovative high-tech materials, more powerful computer chips, pharmaceuticals or in the field of renewable energies, nanoparticles – smallest...

Im Focus: Tailored light inspired by nature

An international research team with Prof. Cornelia Denz from the Institute of Applied Physics at the University of Münster develop for the first time light fields using caustics that do not change during propagation. With the new method, the physicists cleverly exploit light structures that can be seen in rainbows or when light is transmitted through drinking glasses.

Modern applications as high resolution microsopy or micro- or nanoscale material processing require customized laser beams that do not change during...

Im Focus: NYUAD astrophysicist investigates the possibility of life below the surface of Mars

  • A rover expected to explore below the surface of Mars in 2022 has the potential to provide more insights
  • The findings published in Scientific Reports, Springer Nature suggests the presence of traces of water on Mars, raising the question of the possibility of a life-supporting environment

Although no life has been detected on the Martian surface, a new study from astrophysicist and research scientist at the Center for Space Science at NYU Abu...

Im Focus: Manipulating non-magnetic atoms in a chromium halide enables tuning of magnetic properties

New approach creates synthetic layered magnets with unprecedented level of control over their magnetic properties

The magnetic properties of a chromium halide can be tuned by manipulating the non-magnetic atoms in the material, a team, led by Boston College researchers,...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

“Conference on Laser Polishing – LaP 2020”: The final touches for surfaces

23.07.2020 | Event News

Conference radar for cybersecurity

21.07.2020 | Event News

Contact Tracing Apps against COVID-19: German National Academy Leopoldina hosts international virtual panel discussion

07.07.2020 | Event News

 
Latest News

First radio detection of an extrasolar planetary system around a main-sequence star

04.08.2020 | Physics and Astronomy

The art of making tiny holes

04.08.2020 | Physics and Astronomy

Early Mars was covered in ice sheets, not flowing rivers

04.08.2020 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>