Navigation Links
A new class of electron interactions in quantum systems
Date:1/23/2012

Physicists at the University of New South Wales have observed a new kind of interaction that can arise between electrons in a single-atom silicon transistor.

The findings, to be published this week in the journal Physical Review Letters, offer a more complete understanding of the mechanisms for electron transport in nanostructures at the atomic level.

"We have been able to study some of the most complicated transport mechanisms that can arise up to the single atom level," says lead author Dr Giuseppe C. Tettamanzi, from the School of Physics at UNSW.

The results contained in this study open the door for new quantum electronic schemes inwhich it is the orbital nature of the electrons and not their spin or their charge that plays a major role, he says.

The study, in collaboration with scientists from the ICMM in Madrid and the Kavli Institute in The Netherlands, describes how a single electron bound to a dopant atom in a silicon matrix can interact with many electrons throughout the transistor.

In these geometries, electron-electron interactions can be dominated by something called the Kondo effect. Conventionally, this arises from the spin degree of freedom, which represents an angular momentum intrinsic to each electron and is always in the up or in the down state.

However, researchers also observed that similar interactions could arise through the orbital degree of freedom of the electron. This describes the wave-like function of an electron and can be used to help determine an electrons' probable location around the atom's nucleus.

Importantly, by applying a strong magnetic field, the researchers were able to tune thiseffect to eliminate the spin-spin interactions while preserving the orbital-orbital interactions.

"By tuning the effect in two different symmetries of the fundamental state of the systemwe have observed a symmetry crossover identical to those seen in high-energy ph
'/>"/>

Contact: Giuseppe Tettamanzi
g.tettamanzi@unsw.edu.au
61-040-542-1886
University of New South Wales
Source:Eurekalert

Page: 1 2

Related biology technology :

1. LoneStar Heart Acquires Worldwide Exclusive Rights to New Class of Small Molecules That May Lead to New Treatments for Diabetes
2. Omeros Announces it has Unlocked 30 Percent of Class A Orphan GPCRs
3. Veracyte Announces Medicare Coverage for Its Afirma® Gene Expression Classifier for Improved Thyroid Nodule Diagnosis
4. StemCyte Adds World Class Talent to its North America and Global Operations
5. Omeros Announces It Has Unlocked Over 20 Percent of Class A Orphan GPCRs
6. Dual-acting class of antimalarial compounds discovered with potential to prevent and treat malaria
7. New Class of Stem Cell-Like Cells Discovered in Spinal Cord Offers Possibilities for Spinal Cord Repair
8. New Data Suggest Veracytes Afirma® Gene Expression Classifier Cost-Effectively Resolves Inconclusive Thyroid Nodule FNA Biopsy Results
9. SynCo Bio Partners Expands the Class A Zone in its Aseptic Filling Facility
10. HCCS Releases Classroom Management Features for Low Cost Learning Management System
11. Ohios Bioscience Industry Thrives With World-Class Industry Collaboration
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/22/2014)... 22, 2014 Biofeedback – ... (ADHD) is diagnosed, selecting medication to best treat it ... brain patterns by using electroencephalography (EEG) can help predict ... lower the risk of adverse drug events. , The ... in the current issue of the journal Biofeedback ...
(Date:7/21/2014)... Livermore, California (PRWEB) July 21, 2014 ... Alameda County Workforce Investment Board (WIB) and Las ... program to provide technical education and hands-on training ... Engineering Technology Program at Las Positas ... and training needed for engineering technician careers, and ...
(Date:7/21/2014)... of Arts and Sciences has received a major ... , Mathew M. Maye, associate professor of chemistry, ... the National Science Foundation (NSF). The award supports ... the results of which may impact gas storage, ... , Maye,s approach is novel, in that he ...
(Date:7/21/2014)... , July 21, 2014 ... & USA Cancer Biomaker ... Forecasts ResearchMoz presents this most up-to-date ...   to 2018 (Identification, Technologies, Market Analysis, Competitor Profiles, ... Pipeline Analysis. GLOBAL & ...
Breaking Biology Technology:Analyzing Brain Patterns with EEG Can Help Predict Effective Use of Medication 2Analyzing Brain Patterns with EEG Can Help Predict Effective Use of Medication 3Engineering Program Established for Veterans 2Engineering Program Established for Veterans 3Syracuse University chemist to use NSF grant to study materials chemistry, nanoscience 2Global & USA Cancer Biomaker Market to 2018 (Identification, Technologies, Market Analysis, Competitor Profiles, Companion Diagnostic Co-Development, Business Strategies, Industry Trends, and Pipeline Analysis) - Market Size, Trends, and Forecasts A 2Global & USA Cancer Biomaker Market to 2018 (Identification, Technologies, Market Analysis, Competitor Profiles, Companion Diagnostic Co-Development, Business Strategies, Industry Trends, and Pipeline Analysis) - Market Size, Trends, and Forecasts A 3Global & USA Cancer Biomaker Market to 2018 (Identification, Technologies, Market Analysis, Competitor Profiles, Companion Diagnostic Co-Development, Business Strategies, Industry Trends, and Pipeline Analysis) - Market Size, Trends, and Forecasts A 4Global & USA Cancer Biomaker Market to 2018 (Identification, Technologies, Market Analysis, Competitor Profiles, Companion Diagnostic Co-Development, Business Strategies, Industry Trends, and Pipeline Analysis) - Market Size, Trends, and Forecasts A 5Global & USA Cancer Biomaker Market to 2018 (Identification, Technologies, Market Analysis, Competitor Profiles, Companion Diagnostic Co-Development, Business Strategies, Industry Trends, and Pipeline Analysis) - Market Size, Trends, and Forecasts A 6
... Successful internal brand building requires more than a marketing ... people in the organization (HR managers, senior executives and ... this case, the employee experience) play a vital role ... for marketing-style campaigns alone to work. , ,Be ...
... Ventures in Entrepreneurship program is the WAVE of the future ... Cox, Director of the Weinert School of Entrepreneurship ... lags behind in Wisconsin. It is a state that has ... going on here at the university, we have WARF handling, ...
... unit of General Electric Company, announced today that it ... Administration to begin marketing its new 3.0 Tesla ultra-short ... combines the increased speed and higher resolution of an ... found on premium 1.5 Tesla systems. , ,Signa EXCITE ...
Cached Biology Technology:Employer Brands Require More Than Slick Marketing 2WAVE of the Future? 2WAVE of the Future? 3GE Medical Systems Receives FDA Clearance for New MRI System 2
(Date:7/21/2014)... fragments of Middle East Respiratory Syndrome coronavirus (MERS-CoV) in ... with the virus. The work, published this week in ... American Society for Microbiology, indicates that further studies are ... through the air. , MERS, a serious viral respiratory ... 699 people as of June 11, according to the ...
(Date:7/21/2014)... ROUGE LSU,s Mark Batzer, Boyd Professor and Dr. ... Sciences in the College of Science, contributed to an ... titled "The Common Marmoset Genome Provides Insight into Primate ... Batzer contributed analysis of "jumping genes," or mobile elements ... mechanism in the genome. The marmoset is important because ...
(Date:7/21/2014)... monitor seals, every movement, researchers have shown for the ... offshore wind farms and pipelines. Those man-made structures probably ... to a study published in the Cell Press journal ... "I was shocked when I first saw the stunning ... an offshore wind farm in the United Kingdom, says ...
Breaking Biology News(10 mins):Middle East Respiratory Syndrome coronavirus detected in the air of a Saudi Arabian camel barn 2LSU's Mark Batzer contributes to Nature Genetics article on marmoset genome 2Seals forage at offshore wind farms 2
... research by a University of Alberta archeologist may lead ... our ancestors left Africa. U of A researcher ... region of southern Tanzania yielded fossils and other evidence ... sapiens. Her research, recently published in the journal ...
... Alto-based Lyncean Technologies, Inc., today announced its first sale ... source employing state-of-the-art laser-beam and electron-beam technology. ... by researchers from the newly-formed Center for Advanced Laser ... Ludwig Maximilians University of Munich (LMU) and the Technical ...
... A University of Oklahoma-led study has demonstrated that ancient ... The microbiomes from ancient people have broad reaching implications ... what good bacteria might have been lost as a ... aseptic practices. Cecil M. Lewis Jr., professor of ...
Cached Biology News:Tracing humanity's African ancestry may mean rewriting 'out of Africa' dates 2Tracing humanity's African ancestry may mean rewriting 'out of Africa' dates 3Lyncean Technologies Inc. sells Compact Light Source to Munich biomedical-imaging research center 2OU study suggests the bacterial ecology that lives on humans has changed in the last 100 years 2
Rat neural stem cell kits are intended for the in vitro growth and commitment to neuronal and glial lineage differentiation, of cultured fetal rat neural stem and progenitor cells expanded using FGF-...
MOUSE ANTI POLY (ADP-RIBOSE) Immunogen: Purified poly (ADP-ribose) polymer, 10-50 unit chain length...
Edited by D. Patel (1994) Comprehensive data on gel electrophoresis of proteins, nucleic acids, nucleoproteins and carbohydrates....
... Walker (1996) • This book offers ... studying proteins and peptides. Each tried ... instruction, timesaving troubleshooting tips, alternative procedures, ... reagents and suppliers. Topics covered range ...
Biology Products: