Featured Research

from universities, journals, and other organizations

Physicists Identify Possible New Superconductor

Date:
March 19, 2002
Source:
University Of California - Davis
Summary:
A potential new high-temperature superconductor has been identified by physicists at the University of California, Davis. Calculations by Helge Rosner, Alexander Kitaigorodsky and Warren Pickett predict that lithium borocarbide should have essentially no resistance to electrical current at temperatures up to minus 280 F.

A potential new high-temperature superconductor has been identified by physicists at the University of California, Davis. Calculations by Helge Rosner, Alexander Kitaigorodsky and Warren Pickett predict that lithium borocarbide should have essentially no resistance to electrical current at temperatures up to minus 280 F.

Superconductors are used to make very powerful magnets, for example for use in medical magnetic resonance imaging (MRI) machines. They usually need to be cooled to almost absolute zero (minus 450 F) to work. Last year, Japanese scientists found that magnesium diboride, a cheap, readily available material, is a superconductor at minus 389 F, setting off a flurry of research.

Like magnesium diboride, lithium borocarbide is made up of layers of different atoms. Normally, it's a good insulator, but the UC Davis researchers predict that with the right treatment, it should be a superconductor at up to 100 Kelvin (minus 280 F).

The researchers propose using "field-effect doping" to modify the material. Engineers routinely use chemicals to "dope" silicon to make semiconductors. Field-effect doping uses a powerful electric field to force electrons to pile up in the first few layers of the lithium borocarbide structure. Under the right conditions, these electrons would become superconducting.

"Hole-doped lithium borocarbide should be a terrific superconductor, almost certainly better than magnesium diboride," said Pickett. Lithium borocarbide is the first serious candidate in the new class of superconductors related to magnesium diboride, he said.

The results are to be published in Physics Review Letters. Details will also be presented at the American Physical Society meeting in Indianapolis, Ind., March 18-22.


Story Source:

The above story is based on materials provided by University Of California - Davis. Note: Materials may be edited for content and length.


Cite This Page:

University Of California - Davis. "Physicists Identify Possible New Superconductor." ScienceDaily. ScienceDaily, 19 March 2002. <www.sciencedaily.com/releases/2002/03/020319075236.htm>.
University Of California - Davis. (2002, March 19). Physicists Identify Possible New Superconductor. ScienceDaily. Retrieved August 20, 2014 from www.sciencedaily.com/releases/2002/03/020319075236.htm
University Of California - Davis. "Physicists Identify Possible New Superconductor." ScienceDaily. www.sciencedaily.com/releases/2002/03/020319075236.htm (accessed August 20, 2014).

Share This




More Matter & Energy News

Wednesday, August 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Flower Power! Dandelions Make Car Tires?

Flower Power! Dandelions Make Car Tires?

Reuters - Business Video Online (Aug. 20, 2014) Forget rolling on rubber, could car drivers soon be traveling on tires made from dandelions? Teams of scientists are racing to breed a type of the yellow flower whose taproot has a milky fluid with tire-grade rubber particles in it. As Joanna Partridge reports, global tire makers are investing millions in research into a new tire source. Video provided by Reuters
Powered by NewsLook.com
Awesome New Camouflage Sheet Was Inspired By Octopus Skin

Awesome New Camouflage Sheet Was Inspired By Octopus Skin

Newsy (Aug. 19, 2014) Scientists have developed a new device that mimics the way octopuses blend in with their surroundings to hide from dangerous predators. Video provided by Newsy
Powered by NewsLook.com
Researcher Testing on-Field Concussion Scanners

Researcher Testing on-Field Concussion Scanners

AP (Aug. 19, 2014) Four Texas high school football programs are trying out an experimental system designed to diagnose concussions on the field. The technology is in response to growing concern over head trauma in America's most watched sport. (Aug. 19) Video provided by AP
Powered by NewsLook.com
Green Power Blooms as Japan Unveils 'hydrangea Solar Cell'

Green Power Blooms as Japan Unveils 'hydrangea Solar Cell'

AFP (Aug. 19, 2014) A solar cell that resembles a flower is offering a new take on green energy in Japan, where one scientist is searching for renewables that look good. Duration: 01:29 Video provided by AFP
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:
from the past week

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