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:8/31/2015)... SAN FRANCISCO, Calif. , Aug. 31, 2015 /PRNewswire/ ... the discovery and development of novel cancer immunotherapies, announced ... M.D., Ph.D., as Chief Executive Officer and William ... Wong and Ho join an experienced management team led ... Jordan Fridman , Ph.D., Chief Scientific Officer; ...
(Date:8/31/2015)... 31, 2015 Trimb Healthcare AB ("Trimb") today ... YouMedical Group BV ("YouMedical"), a Dutch OTC company with ... sales of approximately EUR 16 million, with solid growth ... "Our ambition is to build a leading international OTC ... that goal. YouMedical gives us a stronger North European ...
(Date:8/31/2015)... ... August 31, 2015 , ... The Food Processing ... and beverage processors, equipment manufacturers and leaders in the field of academia. ... and formulation for manufacturers of bakery and snacks; beverages; dairy; meat, poultry and ...
(Date:8/31/2015)... Irvine,CA (PRWEB) , ... August 31, 2015 , ... Proove ... Orange County Technology Alliance Annual High Tech Awards. , Now in its 22nd ... and products which drive innovation here, across the nation and around the world. The ...
Breaking Biology Technology:FLX Bio Announces Senior Management Hires and Initiation of Phase 1 Trial of FLX925 2FLX Bio Announces Senior Management Hires and Initiation of Phase 1 Trial of FLX925 3FLX Bio Announces Senior Management Hires and Initiation of Phase 1 Trial of FLX925 4METTLER TOLEDO Hosts Food Safety Educational Center at 2015 PROCESS EXPO 2Proove Biosciences, Inc. Named a Finalist for 22nd OC Tech Alliance High-Tech Awards for Company of the Year 2Proove Biosciences, Inc. Named a Finalist for 22nd OC Tech Alliance High-Tech Awards for Company of the Year 3Proove Biosciences, Inc. Named a Finalist for 22nd OC Tech Alliance High-Tech Awards for Company of the Year 4
... . - GE Healthcare and the Vancouver ... million agreement under which the authority would purchase 48 new ... advanced ultrasound technologies and establish new clinical workflow and administrative ... board, said the agreement will result in more precise diagnosis ...
... a series of articles on developing start-up companies in the ... business taxes. , , Madison, Wis. ... begin hiring workers. As discussed in the previous article, you ... Security and Medicare taxes, and unemployment taxes ...
... has added so much complexity to information technology systems ... ,That according to John Swainson, president and CEO of ... address at the 2007 Fusion CEO-CIO Symposium . ... relationship between business and information technology. , ,That relationship ...
Cached Biology Technology:Early Stage 7, Part I: Just what is an employee? 2Early Stage 7, Part I: Just what is an employee? 3Early Stage 7, Part I: Just what is an employee? 4Early Stage 7, Part I: Just what is an employee? 5Fusion 2007: CA chief says IT complexity raises risk 2Fusion 2007: CA chief says IT complexity raises risk 3
(Date:8/4/2015)... ) today reported financial and operating results for the second quarter ... quarter contract revenue of $ 85.2 million, a ... of 26 % , Second quarter adjusted ... royalties in the current quarter , Operating cash ... to present another strong financial quarter, with all our divisions achieving ...
(Date:7/31/2015)... -- Den 10. internationale konference om Genomik (ICG-10, ... 25. oktober i Shenzhen , Kina. ... år. Siden starten i 2006 er ICB blevet en ... er en af de mest dynamiske, entusiastiske og sjove ... gennembrud og fremskridt inden for ,omik,-forskning, som yderligere vil ...
(Date:7/31/2015)... SHENZHEN, China , 31 de julho de 2015 ... Genômica (ICG-10, www.icg-10.org ) será realizada pela BGI de ... China . A conferência está ... inauguração em 2006, a ICG se tornou uma das ... e um dos encontros científicos mais dinâmicos, entusiastas e ...
Breaking Biology News(10 mins):AMRI Announces Second Quarter 2015 Results 2AMRI Announces Second Quarter 2015 Results 3AMRI Announces Second Quarter 2015 Results 4AMRI Announces Second Quarter 2015 Results 5AMRI Announces Second Quarter 2015 Results 6AMRI Announces Second Quarter 2015 Results 7AMRI Announces Second Quarter 2015 Results 8AMRI Announces Second Quarter 2015 Results 9AMRI Announces Second Quarter 2015 Results 10AMRI Announces Second Quarter 2015 Results 11AMRI Announces Second Quarter 2015 Results 12AMRI Announces Second Quarter 2015 Results 13AMRI Announces Second Quarter 2015 Results 14AMRI Announces Second Quarter 2015 Results 15AMRI Announces Second Quarter 2015 Results 16AMRI Announces Second Quarter 2015 Results 17AMRI Announces Second Quarter 2015 Results 18AMRI Announces Second Quarter 2015 Results 19AMRI Announces Second Quarter 2015 Results 20AMRI Announces Second Quarter 2015 Results 21AMRI Announces Second Quarter 2015 Results 22AMRI Announces Second Quarter 2015 Results 23AMRI Announces Second Quarter 2015 Results 24Den 10. internationale konference om Genomics (ICG-10) åbner i oktober 2A 10a. Conferência Internacional sobre Genômica (ICG-10) será em outubro 2A 10a. Conferência Internacional sobre Genômica (ICG-10) será em outubro 3
... depends on the nutritional value and yield of staple food ... an increase in toxic compounds, a decrease in protein content ... 2 and drought conditions. The research, to ... at the Society for Experimental Biology Annual Meeting in Glasgow, ...
... of survival is now better understood. For the first ... Berkeley National Laboratory observed the chemical changes in individual ... kill them. The team tracked the chemical changes ... normally can only exist in an oxygen-free environment. They ...
... Paths" is a response to confusion and uncertainty on ... and electricity -- as a prominent factor in meeting ... joining forces to seek resolution of issues related to ... opportunities to integrate biomass production with food crops and ...
Cached Biology News:Scientists track chemical changes in cells as they endure extreme conditions 2Scientists track chemical changes in cells as they endure extreme conditions 3Sustainable bioenergy project has global launch 2
... developed specifically for pulsed field separations of DNA larger than 2, ... megabase pairs. This agarose has the highest gel ... ... Chromosomal Grade, ...
... this enzyme exists predominantly as XDH which ... a critical plasma antioxidant. During ischemia, ... radical producing XO by oxidation of essential ... cleavage of the amino-terminus. AO has ...
Rabbit Anti-Human Janus Kinase 2 (JAK2 Polyclonal Antibody Family: Protein Kinase Sub-Family: TYK2/JAK Applications: ELISA, Western Blot...
... 2 (VMAT2). An antibody made to the ... at ~55 kDa in postnuclear supernatants of ... wild type cells (2). Some additional bands, ... also detected and remain unaffected by the ...
Biology Products: