Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Discovery of pure organic substances exhibiting the quantum spin liquid state

23.06.2014

Researchers at the University of Tokyo and Japan's National Institute for Materials Science have discovered pure organic substances exhibiting the quantum spin liquid state.

Water loses kinetic energy as it is cooled, and when water molecules become unable to move, water becomes solid (ice). Similarly, electron spins in magnetic materials normally align and form a solid state at low temperature.


Figure 1: (a) An arrangement of dimerized molecules of κ-H3(Cat- EDT-TTF)2 on the 2-D plane, b-c. (b) An anisotropic 2-D triangular lattice made of spin-1/2 molecular dimers. Antiferromagnetically coupled spins normally align in the opposite direction to one another. On a triangular lattice, when two spins (red and blue arrows) align antiparallel, the third spin cannot decide a direction either up or down (and its energy became unstable). This frustration effect restricts spins from formation of an ordered state. (c) 2-D molecular layers bonded by hydrogen atoms.

Recent theoretical studies suggest that spins on a triangular lattice maintain their liquid state (quantum spin liquid state) even at an extremely low temperature.

However, a substantial understanding of this phenomenon, such as whether the quantum spin liquid state really exists, and if it does exist, what kind of spin state it is, has not yet been obtained.

To clarify these matters, efforts have been made over many years in the quest for quantum spin liquid substances.

A group of researchers at the University of Tokyo's Institute for Solid State Physics, led by Professor Hatsumi Mori, project researcher Takayuki Isono (currently a NIMS postdoctoral researcher), and research associate Akira Ueda, were engaged in searching for hydrogen-bonded single-component pure organic semiconductors.

In this process, in partnership with another research group led by Unit Director Shinya Uji at the Superconducting Properties Unit of the National Institute for Materials Science, they discovered that electron spins in a pure organic substance, κ-H3(Cat- EDT-TTF)*2, were in the quantum spin liquid state.

A detailed understanding of quantum spin liquid is expected to present a new direction in the course of research into the superconducting mechanism of high-temperature superconductors and the development of new data storage and communication technology.

*Cat- EDT-TTF: catechol-fused ethylenedithiotetrathiafulvalene

Mikiko Tanifuji | Research SEA News
Further information:
http://www.nims.go.jp/eng/news/press/2014/06/p201406161.html
http://www.researchsea.com

Further reports about: NIMS Superconducting Water phenomenon semiconductors substances superconductors temperature

More articles from Materials Sciences:

nachricht New nontoxic process promises larger ultrathin sheets of 2-D nanomaterials
26.07.2016 | DOE/Oak Ridge National Laboratory

nachricht Self-assembling nano inks form conductive and transparent grids during imprint
26.07.2016 | INM - Leibniz-Institut für Neue Materialien gGmbH

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Self-assembling nano inks form conductive and transparent grids during imprint

Transparent electronics devices are present in today’s thin film displays, solar cells, and touchscreens. The future will bring flexible versions of such devices. Their production requires printable materials that are transparent and remain highly conductive even when deformed. Researchers at INM – Leibniz Institute for New Materials have combined a new self-assembling nano ink with an imprint process to create flexible conductive grids with a resolution below one micrometer.

To print the grids, an ink of gold nanowires is applied to a substrate. A structured stamp is pressed on the substrate and forces the ink into a pattern. “The...

Im Focus: The Glowing Brain

A new Fraunhofer MEVIS method conveys medical interrelationships quickly and intuitively with innovative visualization technology

On the monitor, a brain spins slowly and can be examined from every angle. Suddenly, some sections start glowing, first on the side and then the entire back of...

Im Focus: Newly discovered material property may lead to high temp superconductivity

Researchers at the U.S. Department of Energy's (DOE) Ames Laboratory have discovered an unusual property of purple bronze that may point to new ways to achieve high temperature superconductivity.

While studying purple bronze, a molybdenum oxide, researchers discovered an unconventional charge density wave on its surface.

Im Focus: Mapping electromagnetic waveforms

Munich Physicists have developed a novel electron microscope that can visualize electromagnetic fields oscillating at frequencies of billions of cycles per second.

Temporally varying electromagnetic fields are the driving force behind the whole of electronics. Their polarities can change at mind-bogglingly fast rates, and...

Im Focus: Continental tug-of-war - until the rope snaps

Breakup of continents with two speed: Continents initially stretch very slowly along the future splitting zone, but then move apart very quickly before the onset of rupture. The final speed can be up to 20 times faster than in the first, slow extension phase.phases

Present-day continents were shaped hundreds of millions of years ago as the supercontinent Pangaea broke apart. Derived from Pangaea’s main fragments Gondwana...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

GROWING IN CITIES - Interdisciplinary Perspectives on Urban Gardening

15.07.2016 | Event News

SIGGRAPH2016 Computer Graphics Interactive Techniques, 24-28 July, Anaheim, California

15.07.2016 | Event News

Partner countries of FAIR accelerator meet in Darmstadt and approve developments

11.07.2016 | Event News

 
Latest News

New movie screen allows for glasses-free 3-D

26.07.2016 | Information Technology

Scientists develop painless and inexpensive microneedle system to monitor drugs

26.07.2016 | Health and Medicine

Astronomers discover dizzying spin of the Milky Way galaxy's 'halo'

26.07.2016 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>