Featured Research

from universities, journals, and other organizations

Metallic Silane As A Pathway To High-temperature Superconductivity In Hydrogen

Date:
October 14, 2008
Source:
Uppsala Universitet
Summary:
Researchers have 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.

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.

Related Articles


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."


Story Source:

The above story is based on materials provided by Uppsala Universitet. Note: Materials may be edited for content and length.


Cite This Page:

Uppsala Universitet. "Metallic Silane As A Pathway To High-temperature Superconductivity In Hydrogen." ScienceDaily. ScienceDaily, 14 October 2008. <www.sciencedaily.com/releases/2008/10/081014092838.htm>.
Uppsala Universitet. (2008, October 14). Metallic Silane As A Pathway To High-temperature Superconductivity In Hydrogen. ScienceDaily. Retrieved October 30, 2014 from www.sciencedaily.com/releases/2008/10/081014092838.htm
Uppsala Universitet. "Metallic Silane As A Pathway To High-temperature Superconductivity In Hydrogen." ScienceDaily. www.sciencedaily.com/releases/2008/10/081014092838.htm (accessed October 30, 2014).

Share This



More Matter & Energy News

Thursday, October 30, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Mind-Controlled Prosthetic Arm Restores Amputee Dexterity

Mind-Controlled Prosthetic Arm Restores Amputee Dexterity

Reuters - Innovations Video Online (Oct. 29, 2014) A Swedish amputee who became the first person to ever receive a brain controlled prosthetic arm is able to manipulate and handle delicate objects with an unprecedented level of dexterity. The device is connected directly to his bone, nerves and muscles, giving him the ability to control it with his thoughts. Matthew Stock reports. Video provided by Reuters
Powered by NewsLook.com
Robots Get Funky on the Dance Floor

Robots Get Funky on the Dance Floor

AP (Oct. 29, 2014) Dancing, spinning and fighting robots are showing off their agility at "Robocomp" in Krakow. (Oct. 29) Video provided by AP
Powered by NewsLook.com
Saharan Solar Project to Power Europe

Saharan Solar Project to Power Europe

Reuters - Business Video Online (Oct. 29, 2014) A solar energy project in the Tunisian Sahara aims to generate enough clean energy by 2018 to power two million European homes. Matt Stock reports. Video provided by Reuters
Powered by NewsLook.com
Lowe's Testing Robot Sales Assistants in California Store

Lowe's Testing Robot Sales Assistants in California Store

Buzz60 (Oct. 29, 2014) Lowe’s is testing out what it’s describing as a robotic shopping assistant in one of its Orchard Supply Hardware Stores in California. Jen Markham explains. Video provided by Buzz60
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

    Environment News

    Technology News



    Save/Print:
    Share:

    Free Subscriptions


    Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

    Get Social & Mobile


    Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

    Have Feedback?


    Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
    Mobile: iPhone Android Web
    Follow: Facebook Twitter Google+
    Subscribe: RSS Feeds Email Newsletters
    Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins