Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Metallic Silane as a pathway to high-temperature superconductivity in Hydrogen

Abstract:
An international research team led by Professor Rajeev Ahuja, Uppsala University, has used theoretical calculations to understand a high-pressure structural phase transition in silane which could gives rise to metallization and could even result in superconductivity.

Metallic Silane as a pathway to high-temperature superconductivity in Hydrogen

Sweden | Posted on October 14th, 2008

The findings are published this week in the online edition of the Proceedings of the National Academy of Sciences of the United States of America (PNAS).

Hydrogen is the the one of most abundant and lightest element in the universe, and it has been speculated already fifty years back that metallization in pure hydrogen could lead to room- temperature superconductivity, which has been an open question till now. But enormous pressure would be required to compress hydrogen sufficiently in order to achieve this metallic state.

One way to overcome this problem is to take advantage of so-called "chemical pressure", generated by introducing other elements, such as silicon, to exert additional pressure by "sandwiching" the hydrogen layers, producing a hydrogen-rich material known as silane.

Earlier this year, experimentalists at the Geophysical Laboratory of the Carnegie Institution of Washington have reported on the metallization of silane under pressure, but it remained unclear in what crystal structure silane existed in these experiments.

This prompted the team led by Professor Rajeev Ahuja to carry out a systematic computercomputational experiments based on state-of-the-art first-principles methods to determine the structure for metallic silane, and they succeeded in identifying one crystal structure from a pool of plausible candidates that matches all requirements. The findings are in excellent agreement with experiment and allowed even for the prediction that the metallic phase of silane could exist at lower pressures. The extensive simulations were performed at Uppsala University's Multidisciplinary Center for Advanced Computational Science (UPPMAX).

"Metallization of silane represents an extraordinarily important discovery", says Professor Rajeev Ahuja. "Our results can be seen to represent an important advancement in the theoretical search for metallic and even superconducting hydrogen within a tractable pressure regime."

####

For more information, please click here

Copyright © Uppsala University

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Ag/ZnO-Nanorods Schottky diodes based UV-PDs are fabricated and tested May 26th, 2017

New metamaterial-enhanced MRI technique tested on humans May 26th, 2017

Controlling 3-D behavior of biological cells using laser holographic techniques May 26th, 2017

Unveiling the quantum necklace: Researchers simulate quantum necklace-like structures in superfluids May 26th, 2017

Nanomechanics, Inc. to Exhibit at the SEM Conference: Nanoindentation experts will attend and exhibit their instruments at the Conference and Exposition on Experimental and Applied Mechanics in Indianapolis May 25th, 2017

Physics

Unveiling the quantum necklace: Researchers simulate quantum necklace-like structures in superfluids May 26th, 2017

Ultracold atom waves may shed light on rogue ocean killers: Rice quantum experiments probe underlying physics of rogue ocean waves April 27th, 2017

Geoffrey Beach: Drawn to explore magnetism: Materials researcher is working on the magnetic memory of the future April 25th, 2017

Discoveries

Ag/ZnO-Nanorods Schottky diodes based UV-PDs are fabricated and tested May 26th, 2017

New metamaterial-enhanced MRI technique tested on humans May 26th, 2017

Controlling 3-D behavior of biological cells using laser holographic techniques May 26th, 2017

Unveiling the quantum necklace: Researchers simulate quantum necklace-like structures in superfluids May 26th, 2017

Announcements

Ag/ZnO-Nanorods Schottky diodes based UV-PDs are fabricated and tested May 26th, 2017

New metamaterial-enhanced MRI technique tested on humans May 26th, 2017

Controlling 3-D behavior of biological cells using laser holographic techniques May 26th, 2017

Unveiling the quantum necklace: Researchers simulate quantum necklace-like structures in superfluids May 26th, 2017

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project