Navigation Links
Like fish on waves: electrons go surfing
Date:9/22/2011

Physicists at the RUB, working in collaboration with researchers from Grenoble and Tokyo, have succeeded in taking a decisive step towards the development of more powerful computers. They were able to define two little quantum dots (QDs), occupied with electrons, in a semiconductor and to select a single electron from one of them using a sound wave, and then to transport it to the neighbouring QD. A single electron "surfs" thus from one quantum dot to the next like a fish on a wave. Such manipulation of a single electron will in the future also enable the combination of considerably more complex quantum bits instead of classical bits ("0" and "1" states). The researchers have reported their results in Nature, one of the highest-impact-factor international scientific journals.

Semiconductor physics: a fisherman's dream

Electrons can move as freely as fish in water in electric conductors (metals) and semiconductors such as silicon (Si) or gallium arsenide (GaAs), albeit not "swimming" of their own but moving owing to differences in voltage. Inside a metal, they are present as a huge number of fish that fill nearly the entire volume of water. In semiconductors, this "fish density" is not as high and so the distance between the electrons (fish) is much larger. The electrons can be concentrated in a thin layer near the surface by the application of an external voltage. The new method that the international team of researchers has developed now fulfils this "fisherman's dream" for semiconductor physicists. The electron "fish" are all in one layer close to the surface and easily, individually accessible from the surface.

Fishing one from the quantum dot

Prof. Andreas Wieck, physicist at the RUB, points out that there are, however no, "big fish," all electrons being similar and even always identical, undistinguishable objects. The method that the researchers from Germany, France and Japan used, nevertheless
'/>"/>

Contact: Prof. Dr. Andreas Wieck
andreas.wieck@rub.de
49-234-322-6726
Ruhr-University Bochum
Source:Eurekalert

0

GOOD

Page: 1 2 3

Related biology technology :

1. Material created at Purdue lets electrons dance and form new state
2. Scientists shed light on the private lives of electrons
3. At small scales, tug-of-war between electrons can lead to magnetism
4. Measurement of hot electrons could have solar energy payoff
5. Pitt-led researchers create super-small transistor, artificial atom powered by single electrons
6. Princeton scientists find unusual electrons that go with the flow
7. Stretching single molecules allows precision studies of interacting electrons
8. Elusive hot electrons captured in ultra-thin solar cells
9. Laser pulses control single electrons in complex molecules
10. Latest issue of Science: Nanosonar uses electrons to measure under the surface
11. Latest issue of Science: Nano-sonar uses electrons to measure under the surface
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/17/2013)... USA (PRWEB) May 17, 2013 •    First ... Globes Certified for sustainability ,     New facility will ... , Syngenta unveiled its new ... at the company’s RTP Innovation Center. The first of ... researchers to simulate any agricultural climate and precisely measure ...
(Date:5/17/2013)... , May 17, 2013  Yongye International, Inc. ... a leading developer, manufacturer, and distributor of crop nutrient ... , today announced that, on May 16, 2013, ... of directors (the "Board of Directors") was provided a ... Hong Kong ) Limited ("Abax") to Full ...
(Date:5/17/2013)... Men’s skin is biologically different than women’s ... and has been known to react more aggressively when hormones ... far from puberty, other acne causing factors like P.acnes bacteria ... threatening skin with unsightly acne scars. Adult acne treatment, Probiotic ... on how to reduce and prevent acne scarring. , ...
(Date:5/17/2013)... Rust removal is one of home maintenance's essential processes. ... damaged. To help rust contractors make it less expensive, My ... remover it called Rusterizer. It announced that for this ... My Cleaning Products explained that rust could damage items in ... The first one, it said, happens when rust forms ...
Breaking Biology Technology:Syngenta Opens Unique $72 Million Advanced Crop Lab 2Syngenta Opens Unique $72 Million Advanced Crop Lab 3Yongye International Provides Update on Status of Proposed Go Private Offer 2Yongye International Provides Update on Status of Proposed Go Private Offer 3Yongye International Provides Update on Status of Proposed Go Private Offer 4Adult Acne Treatment, Probiotic Action Shares New Insight on Why Men’s Skin Scars from Acne and How to Prevent It 2Organic-Based Rust Remover Cuts Down Price by 10%, My Cleaning Products Details Mechanics How to Get the Discount 2
... Dr Albert J Ketterman and SHP Parakrama Karunaratne, Dept. of Medical,Parasitology, ... , ... In attempts to control Culex quinquefasciatus as a worldwide vector of , ... , are sprayed with organophosphate insecticides. However, ...
... , and Jef , Raus 1, 2 , 1 ... Universitaire Campus, B-3590 Diepenbeek, Belgium , ... Phenylketonuria (PKU) is a hereditary disease that gives rise to elevated , ... by , mutations in the phenylalanine hydroxylase gene. This ...
... Igarashi , Tochigi Cancer Center, Tochigi, Japan , ... Introduction , Denaturing gradient gel ... used mutation scanning methods. It has evolved enormously over the last , ... A practical method on this topic has been reported recently. 1 ...
Cached Biology Technology:Preparative Nondenaturing Gel Electrophoresis Used in the Purification of an Esterase Involved in Insecticide Resistance, Rev C 2Preparative Nondenaturing Gel Electrophoresis Used in the Purification of an Esterase Involved in Insecticide Resistance, Rev C 3Identification of Disease Causing Mutations in Phenylketonuria by Denaturing Gradient Gel Electrophoresis Using the DCode System 2Identification of Disease Causing Mutations in Phenylketonuria by Denaturing Gradient Gel Electrophoresis Using the DCode System 3Identification of Disease Causing Mutations in Phenylketonuria by Denaturing Gradient Gel Electrophoresis Using the DCode System 4Identification of Disease Causing Mutations in Phenylketonuria by Denaturing Gradient Gel Electrophoresis Using the DCode System 5Detection of p53 Gene in Breast Cancer by Denaturing Gradient Gel Electrophoresis and the DCode System 2Detection of p53 Gene in Breast Cancer by Denaturing Gradient Gel Electrophoresis and the DCode System 3
(Date:5/17/2013)... Cargo in Efficient and Sustainable Global Logistics Operations) is ... in the efficiency of intermodal loading systems and the ... comprises 29 European organisations with experience in the logistics ... budget totalling 17,000,000 and a duration of three and ... and develop the semantic components and ontologies shared by ...
(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)... have used ancient shorelines to predict the stability of today,s ... high shoreline from three million years ago, for example ... thought to be evidence of a high sea level due ... led many scientists to think that if the world,s largest ... just the same in our modern, progressively warming world. ...
Breaking Biology News(10 mins):New logistics services that will cut energy consumption and CO2 emissions 2Underrepresented minority students receive fellowships in digestive disease and nutrition research 2World's biggest ice sheets likely more stable than previously believed 2
... Thomas Jefferson University in Philadelphia have shown that a ... prostate cancer cell growth. The researchers, led by Kimmel ... newly found connection will aid in better understanding the ... against the disease. , SIRT1 is a member ...
... in mediating the outcome of competition between rival groups, ... the New World--or, on a much smaller ecological scale, ... competing bacteria. In a new study, researchers have compared ... one another, and they have found that each strategy ...
... professionals and the general public alike have been acutely aware ... pandemic. Although many people might still recall the pandemics of ... possibility of a recurrence on that scale--that causes the most ... exactly how many people died from this particular strain of ...
Cached Biology News:Jefferson scientists find aging gene also protects against prostate cancer development 2Different strategies underlie the ecology of microbial invasions 2Recurrence of a flu pandemic similar to infamous 1918 flu could kill 62 million 2Recurrence of a flu pandemic similar to infamous 1918 flu could kill 62 million 3
GBL Antibody...
Human acetylcholine receptor (AChR)-alpha. Exhibits homogenous, high affinity,binding to the receptor. Binds weakly to a64-78. Inhibits binding of many,myasthenia gravis sera to human AChR....
... Mouse monoclonal [SPM278] to 67kD Laminin Receptor, ... carcinoma N592 live cells (Human). Reactivity ... yet tested in other species. Background ... glycoproteins of basement membrane, displays multiple biological ...
... Well BAC Prep; Ideal for ... 1.5ml 2xYT cultures; Provides high-quality ... sequencing for small to large ... which minimizes shearing and improves ...
Biology Products: