Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Development of “Slater Insulator” that Rapidly Changes from Conductor to Insulator at Room Temperature

11.07.2012
Dr. Kazunari Yamaura, a Principal Researcher of the NIMS Strongly Correlated Materials Group, Superconducting Properties Unit, in joint work with a research group at the Oak Ridge National Laboratory (United States), has succeeded in developing a Slater insulator which functions at room temperature.
Dr. Kazunari Yamaura, a Principal Researcher of the Strongly Correlated Materials Group, Superconducting Properties Unit, National Institute for Materials Science (NIMS; President: Sukekatsu Ushioda), in joint work with a research group at the Oak Ridge National Laboratory in the United States, succeeded in development of a Slater insulator which functions at room temperature.

Slater insulators have been studied for more than 50 years as insulators with special properties. Although Slater insulators display the properties of metals at a sufficiently high temperature, they become insulators when cooled to a certain temperature (transition temperature) peculiar to the substance concerned. Because this transition temperature was conventionally far lower than room temperature, study had been limited to scientific research, and virtually no research had been done aiming at development to applications.

This research clarified the fact that a new material (Perovskite type osmium oxide), which was synthesized for the first time by NIMS in 2009, is the Slater insulator with the highest transition temperature to date. This result was verified through joint experimental research with a research group at the Oak Ridge National Laboratory in the United States using the neutron diffraction method.

Because this new material displays the characteristics of a Slater insulator at room temperature without requiring cooling, it is not only scientifically interesting, but also has the potential for development to application as a new material. If further progress can be achieved in research with this new material as a starting point, there is a possibility that new materials and devices with unprecedented functions can be developed. Concretely, application to solid state devices for detecting signals in the terahertz region, new thermoelectric conversion materials, etc. is considered possible. In the future, research will be carried out aiming at development of new materials with possible practical applications.

This result was obtained as part of “Research on Energy Conversion Functions of Slater Materials” (Research representative: Kazunari Yamaura) under the Advanced Low Carbon Technology Research and Development Program (ALCA) of the Japan Science and Technology Agency (JST). This achievement is to be published in a journal of the American Physical Society, Physical Review Letters (online version).

(Left) Photograph of a crystal of Perovskite type osmium oxide and (right) schematic diagram of its crystal structure. White circles: sodium ions, red circles: oxygen ions. Osmium ions exist in the central part of the octahedron. ©NIMS

For further details:

Principal Researcher, Superconducting Properties Unit
Kazunari Yamaura
TEL: +81-29-860-4658
FAX: +81-29-860-4674
E-Mail: YAMAURA.Kazunari=nims.go.jp
(Please change "=" to "@")

For general information:

NIMS Public Relations Office
TEL: +81-29-859-2026
FAX: +81-29-859-2017
E-Mail: pr@nims.go.jp

Mikiko Tanifuji | Research asia research news
Further information:
http://www.nims.go.jp

More articles from Materials Sciences:

nachricht New approach to revolutionize the production of molecular hydrogen
22.05.2017 | Technische Universität Dresden

nachricht Photocatalyst makes hydrogen production 10 times more efficient
19.05.2017 | Kobe University

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Wafer-thin Magnetic Materials Developed for Future Quantum Technologies

Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.

Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...

Im Focus: World's thinnest hologram paves path to new 3-D world

Nano-hologram paves way for integration of 3-D holography into everyday electronics

An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...

Im Focus: Using graphene to create quantum bits

In the race to produce a quantum computer, a number of projects are seeking a way to create quantum bits -- or qubits -- that are stable, meaning they are not much affected by changes in their environment. This normally needs highly nonlinear non-dissipative elements capable of functioning at very low temperatures.

In pursuit of this goal, researchers at EPFL's Laboratory of Photonics and Quantum Measurements LPQM (STI/SB), have investigated a nonlinear graphene-based...

Im Focus: Bacteria harness the lotus effect to protect themselves

Biofilms: Researchers find the causes of water-repelling properties

Dental plaque and the viscous brown slime in drainpipes are two familiar examples of bacterial biofilms. Removing such bacterial depositions from surfaces is...

Im Focus: Hydrogen Bonds Directly Detected for the First Time

For the first time, scientists have succeeded in studying the strength of hydrogen bonds in a single molecule using an atomic force microscope. Researchers from the University of Basel’s Swiss Nanoscience Institute network have reported the results in the journal Science Advances.

Hydrogen is the most common element in the universe and is an integral part of almost all organic compounds. Molecules and sections of macromolecules are...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Dortmund MST Conference presents Individualized Healthcare Solutions with micro and nanotechnology

22.05.2017 | Event News

Innovation 4.0: Shaping a humane fourth industrial revolution

17.05.2017 | Event News

Media accreditation opens for historic year at European Health Forum Gastein

16.05.2017 | Event News

 
Latest News

New approach to revolutionize the production of molecular hydrogen

22.05.2017 | Materials Sciences

Scientists enlist engineered protein to battle the MERS virus

22.05.2017 | Life Sciences

Experts explain origins of topographic relief on Earth, Mars and Titan

22.05.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>