Navigation Links
Princeton scientists find unusual electrons that go with the flow
Date:7/14/2010

On a quest to discover new states of matter, a team of Princeton University scientists has found that electrons on the surface of specific materials act like miniature superheroes, relentlessly dodging the cliff-like obstacles of imperfect microsurfaces, sometimes moving straight through barriers.

The Princeton work represents the first time such behavior of electrons has been tracked and recorded, and hints at the possibilities of speeding up integrated circuits that process information by flow of electrons between different devices. The new materials potentially could break the bottleneck that occurs when metallic interconnects get so small that even the tiniest atomic imperfection hinders their performance.

Physics professor Ali Yazdani and his team observed the extraordinary physics behavior in a "topological surface state" on a microscopic wedge of the metal antimony. The work is reported in the July 15 issue of Nature.

Normally, electron flow in materials is impeded by imperfections -- seemingly slight edges and rifts act like cliffs and crevasses in this microscopic world, blocking electrons in their path. Recent theories, however, predict that electrons on the surface of some compounds containing elements such as antimony can be immune to such disruptions in their flow. The connectivity in their flow, Yazdani said, stems from a special form of electron wave that seemingly alters the pattern of flow around any imperfection.

Many of the "topological" materials, such as antimony, have been important in the world economy; however, their unusual surface conduction previously had not been examined. Part of the challenge had been the difficulty in measuring the flow of electrons just at the surface, a task that was accomplished by the Princeton group using a specialized microscopy technique that enables precise visualization of electrons at the surface of materials.

"Material imperfections just cannot
'/>"/>

Contact: Kitta MacPherson
kittamac@princeton.edu
609-258-5729
Princeton University
Source:Eurekalert  

0

GOOD

Page: 1 2 3 4

Related biology technology :

1. Princeton scientists find an equation for materials innovation
2. Twelve Women Scientists Announced as Winners of Elsevier Foundation TWOWS Awards
3. Scientists strive to replace silicon with graphene on nanocircuitry
4. Prestigious International Champalimaud Vision Award to US Scientists
5. Scientists Give the Go-Ahead for Private Storage of Stem Cells From Umbilical Cord Blood
6. Scientists create artificial mini black hole
7. Hat-trick for University of Montreal scientists
8. Scientists boot up a bacterial cell with a synthetic genome
9. Scientists ID bacterial genes that improve plant growth
10. Nano parfait a treat for scientists
11. Berkeley Lab scientists create molecular paper
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Princeton scientists find unusual electrons that go with the flow
(Date:5/20/2013)... 20, 2013 Researchers from the Southern ... between lower back pain, and the acne causing P.acnes bacteria. ... system the bacteria seek out oxygen deprived location to seek ... spinal column, P.acnes has the ability to live in the ... Perez, a spokesman for “ The best acne treatment ” ...
(Date:5/20/2013)... Kitware, a leader in data visualization, today unveils ... exploration of hospital costs across the United States . ... release of “Medicare Provider Charge Data,” a dataset of ... the Centers for Medicare & Medicaid Services. , The ... across the country has sparked considerable controversy; however, it ...
(Date:5/19/2013)... York, NY (PRWEB) May 19, 2013 ... solar boat, today announced a new speed record for ... left from Las Palmas, Spain, on April 25, 2013, ... the Atlantic Ocean at the average speed of 5.3 ... West Indies on May 18, 2013. The first-of-its-kind catamaran ...
(Date:5/17/2013)... Dr. Sparano is Professor of Medicine and ... Albert Einstein College of Medicine and Associate Chairman of ... He is also Associate Director for Clinical Research ... Breast Cancer Working Group, a multidisciplinary group of physicians ... also serves as Vice Chair of the National Cancer ...
Breaking Biology Technology:Adult Acne Treatment, Probiotic Action Shares New Insight How Treating Acne May Help Reduce Body Pain 2Kitware Enables Interactive Exploration of CMS Medicare Data 2MS Tûranor PlanetSolar Sets World Speed Record for Transatlantic Crossing by Solar Electric Vessel 2MS Tûranor PlanetSolar Sets World Speed Record for Transatlantic Crossing by Solar Electric Vessel 3MS Tûranor PlanetSolar Sets World Speed Record for Transatlantic Crossing by Solar Electric Vessel 4MS Tûranor PlanetSolar Sets World Speed Record for Transatlantic Crossing by Solar Electric Vessel 5MS Tûranor PlanetSolar Sets World Speed Record for Transatlantic Crossing by Solar Electric Vessel 6Joseph A. Sparano, MD, Named Vice Chair of ECOG-ACRIN Cancer Research Group 2Joseph A. Sparano, MD, Named Vice Chair of ECOG-ACRIN Cancer Research Group 3
... Orexigen® Therapeutics, Inc. (Nasdaq: OREX ), a ... announced the schedule of its upcoming Contrave® (naltrexone sustained ... Annual Scientific Meeting of The Obesity Society. This meeting ... October 8-12, 2010.Sunday, October 10:  Embargo Lifts October 10 ...
... caprotec bioanalytics GmbH announced today the appointment of ... Officer and Chief Operating Officer of the company.  Prior ... at Merck & Co., Schering AG and Novartis. ... leader in the global pharmaceutical industry," said caprotec founder ...
... RHHBY) announced today that the cobas ® TaqScreen DPX Test ... now available with the CE Mark. It is the first IVD ... B19 (B19V) and hepatitis A virus (HAV) in one assay. The ... which simultaneously quantifies B19V genotypes 1, 2 and 3 DNA and ...
Cached Biology Technology:Orexigen® Therapeutics Announces Upcoming Data Presentations at the 28th Annual Scientific Meeting of The Obesity Society 2caprotec bioanalytics GmbH Appoints Prof. Dr. Rainer Metternich as Managing Director, Chief Business Officer and Chief Operating Officer 2First Duplex Test for Parvovirus B19 and Hepatitis A Virus Increases Safety of Human Plasma and Plasma Products 2First Duplex Test for Parvovirus B19 and Hepatitis A Virus Increases Safety of Human Plasma and Plasma Products 3
(Date:5/16/2013)... (May 17, 2013) Illustrating a commitment to ... American Gastroenterological Association (AGA) Research Foundation has announced ... Research Fellowship Award recipients. Supported by the National ... (NIDDK), this new award helps underrepresented minority students ... and nutrition research. , "By establishing this new ...
(Date:5/16/2013)... fast food restaurant had a higher body mass index ... food, according to researchers at The University of Texas ... strong among those with a lower income. , ... Journal of Public Health indicates higher BMI associates ... among lower-income African-Americans, the density, or number, of fast ...
(Date:5/16/2013)... Injectable nanoparticles developed at MIT may someday eliminate ... to constantly monitor their blood-sugar levels and inject ... to sense glucose levels in the body and ... thereby replacing the function of pancreatic islet cells, ... diabetes. Ultimately, this type of system could ensure ...
Breaking Biology News(10 mins):Underrepresented minority students receive fellowships in digestive disease and nutrition research 2Body mass index of low income African-Americans linked to proximity of fast food restaurants 2Body mass index of low income African-Americans linked to proximity of fast food restaurants 3Nanotechnology could help fight diabetes 2Nanotechnology could help fight diabetes 3
... in Alaska's tundra, and a corresponding northward progression of the ... of warmer and longer summers in the Alaskan Arctic according ... 22, 2005, issue of Science Express. , The resulting atmospheric ... what might be observed if there was a doubling of ...
... at blink-of-the-eye speeds by squirting chemicals called neurotransmitters across ... lots of different receptors and neurotransmitters work simultaneously. Which ... reported in the July 20 issue of the Journal ... led by David Featherstone, a University of Illinois at ...
... is detected is a defensive, protective reaction. This ancestral ... by a potential predator. A new study published in ... freeze when encountering a threat. The mere picture of ... viewing these unpleasant images, the study's participants froze as ...
Cached Biology News:Lands surface change on Alaska tundra creating longer, warmer summers in Arctic 2UIC researchers show protein routes messages in nerve cells 2When in danger humans are similar to a deer in the headlights 2
... LC Sciences provides a genome-wide microRNA (miRNA) ... proprietary probe design, which enable highly sensitive ... We have standard arrays for mature miRNA ... version of the Sanger miRBase database (Release ...
... immunological studies, vaccine development, and biosensor ... powerful Paraflo microfluidic on-chip synthesis platform. ... of our comprehensive Epitope Peptide Microarray ... Probe content is completely customer ...
... Custom peptide microarrays designed for quantitative ... samples and built on the flexible ... Thousands of customer specified sequences can ... can provide assistance with custom sequence ...
... Now, for the first time, you can ... and more efficiently without interferences. The Agilent ... remove unwanted, multiple high-abundant proteins from human ... with just one device. With this revolutionary ...
Biology Products: