Navigation Links
Scientists observe how superconducting nanowires lose resistance-free state
Date:9/22/2011

DURHAM, N.C. -- Even with today's invisibility cloaks, people can't walk through walls. But, when paired together, millions of electrons can.

The electrons perform this trick, called macroscopic quantum tunneling, when they pair up and move into a region of space that is normally off-limits under the laws of classical mechanics. The problem is that as millions of electrons collectively move through a superconducting nanowire, they use energy and give off heat.

The heat can build, transforming sections of the wire into a non-superconducting state. The process, called a phase slip, adds resistance to an electrical system and has implications for designing new nano-scale superconductors.

Now, scientists have observed individual phase slips in aluminum nanowires and characterized the nature and temperature at which they occur. This information could help scientists remove phase slips from nano-scale systems, which could lead to more reliable nanowires and more efficient nano-electronics, said Duke physicist Albert Chang.

The results appeared online Sept. 21 in Physical Review Letters.

The macroscopic quantum tunneling effect was first observed in a system called a Josephson junction. This device has a thin insulating layer connecting two superconductors, which are several nanometers wide and have a three-dimensional shape.

To study the tunneling and phase slips in a simpler system, however, Chang and his colleagues used individual, one-dimensional nanowires made of aluminum. The new observations are "arguably the first convincing demonstration of tunneling of millions of electrons in one-dimensional superconducting nanowires," said Chang, who led the study.

In the experiment, the wires ranged in length from 1.5 to 10 micrometers, with widths from five to 10 nanometers. Chang cooled the wires to a temperature close to absolute zero, roughly 1 degree Kelvin or -458 degrees Fahrenheit.

At t
'/>"/>

Contact: Ashley Yeager
ashley.yeager@duke.edu
919-681-8057
Duke University
Source:Eurekalert

Page: 1 2 3

Related biology technology :

1. Clemson scientists put a (nano) spring in their step
2. City of Hope Helps KGI Launch New Management Training Program for Scientists
3. University of Pennsylvania scientists move optical computing closer to reality
4. Scientists grow nanonets able to snare added energy transfer
5. The National Cancer Institute Joins the Global Community of Scientists Now Using BIOMARKERcenter From Thomson Reuters
6. Scientists peel away the mystery behind golds catalytic prowess
7. SACHEM Launches 2-D HPLC e-Learning Program : New e-Learning Program Teaches Scientists How to Better Analyze and Prove Product Purity Through Greater Sensitivity and Precision in Identification of Trace Components
8. Vermillion and Stanford Scientists Receive Best Research Award From the PAD Coalition
9. Brewing better beer: Scientists determine the genomic origins of lager yeasts
10. Tengion Scientists Publish Positive Preclinical Findings With Neo-Organ Demonstrating Long-term Durability and Growth With Skeletal Maturation
11. CU scientists create worlds thinnest balloon -- just one atom thick
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/23/2014)... , July 23, 2014  AuraSense Therapeutics, ... as gene regulatory and immunotherapeutic agents, announced ... joined AuraSense Therapeutics, executive leadership team as ... Prior to joining AuraSense Therapeutics, Mr. ... Financial Officer of Cellular Dynamics International Inc., ...
(Date:7/23/2014)... July 23, 2014 StemGenex® , ... in the US aimed at improving the lives of ... clinical study for Parkinson’s disease. StemGenex believes that ... cell therapy are paramount when providing care to patients ... makes stem cell therapy accessible to the millions of ...
(Date:7/23/2014)... , July 23, 2014 ... ), the global specialty biopharmaceutical company, and ArmaGen, ... a worldwide licensing and collaboration agreement for AGT-182, ... potential treatment of both the central nervous system ... syndrome (MPS II). This collaboration strengthens Shire,s rare ...
(Date:7/23/2014)... Plainsboro, N.J. (PRWEB) July 23, 2014 ... Lineberger Comprehensive Cancer Center has joined its Strategic ... the Strategic Alliance Partnership program, UNC Lineberger will ... team to raise awareness of its cutting-edge research ... Experts from UNC Lineberger will work with OncLive ...
Breaking Biology Technology:AuraSense Therapeutics Appoints Biotechnology Veteran David S. Snyder as Chief Financial Officer 2StemGenex® Gives Hope to Parkinson’s Patients through New Stem Cell Clinical Study 2StemGenex® Gives Hope to Parkinson’s Patients through New Stem Cell Clinical Study 3Shire Enters Strategic Licensing and Collaboration Agreement With ArmaGen 2Shire Enters Strategic Licensing and Collaboration Agreement With ArmaGen 3Shire Enters Strategic Licensing and Collaboration Agreement With ArmaGen 4Shire Enters Strategic Licensing and Collaboration Agreement With ArmaGen 5OncLive Expands Its Strategic Alliance Partnership Program With the Addition of UNC Lineberger Comprehensive Cancer Center 2OncLive Expands Its Strategic Alliance Partnership Program With the Addition of UNC Lineberger Comprehensive Cancer Center 3
... YORK, April 24 The Children,s Hospital Foundation,the ... and,Royalty Pharma announced today that the Foundation has ... of RotaTeq(R) from and after October,1, 2007, to ... (Logo: http://www.newscom.com/cgi-bin/prnh/20061026/RPLOGO ), "With the ...
... provides 510(k) on examination gloves made from U.S.-sourced guayule ... with Type I latex allergy, MARICOPA, Ariz., April ... found to be safe for medical devices, received,510(k) clearance ... market,the first medical device made from guayule, a desert ...
... The Board of,Directors of Shire plc (LSE: ... company, announces today that Michael Rosenblatt M.D.,will join ... effect., Dr Rosenblatt is the Dean of ... previously Professor of Medicine at Harvard,Medical School and ...
Cached Biology Technology:Royalty Pharma Acquires Royalty Interest in RotaTeq(R) from The Children's Hospital Foundation for $182 Million 2Royalty Pharma Acquires Royalty Interest in RotaTeq(R) from The Children's Hospital Foundation for $182 Million 3FDA Clears First Medical Product Made From Yulex(R) Natural Rubber 2Dr Michael Rosenblatt Appointed Non-Executive Director at Shire 2Dr Michael Rosenblatt Appointed Non-Executive Director at Shire 3Dr Michael Rosenblatt Appointed Non-Executive Director at Shire 4
(Date:7/23/2014)... that has the entire country in its grip is affecting ... be responsible for the proliferation of a heat-loving amoeba commonly ... hot springs, which the drought has made warmer than usual ... an infection caused by this parasite after swimming in several ... of an individual and travels to the brain. Nose plugs ...
(Date:7/23/2014)... DC -- The planet,s soil releases about 60 billion ... is far more than that released by burning fossil ... This enormous release of carbon is balanced by carbon ... other plant matter, as well as by the underground ... have documented that rising temperatures increase the rate of ...
(Date:7/23/2014)... is commonly found in dead bodies and is ... death, referred to as the post mortem interval. A ... from Tamil Nadu is provided for the first ... generation of DNA barcoding. This study, significant in forensic ... Data Journal . , Chrysomya megacephala is ...
Breaking Biology News(10 mins):Diseases of another kind 2Climate change and the soil 2Dead body feeding larvae useful in forensic investigations 2
... Researchers have demonstrated a new imaging tool for tracking ... bloodstream, which could aid efforts to perfect their use ... have potential applications in drug delivery to treat diseases ... are created in the manufacturing process, metallic and semiconducting. ...
... such as sharks, tunas, swordfish, and marlins are becoming increasingly ... researchers. In half of the North Atlantic ... to a 90-per-cent decrease in top predators since the 1950s, ... according to a new study published online today in the ...
... RIVERSIDE, Calif. A team of scientists from the University ... in the United States, last seen in 1956, living in ... as "Cockerell,s Bumblebee," the bee was originally described in 1913 ... 16 specimens collected near the town of Cloudcroft, and one ...
Cached Biology News:'Label-free' imaging tool tracks nanotubes in cells, blood for biomedical research 2Marine predators in trouble: UBC researchers 2Scientists rediscover rarest US bumblebee 2Scientists rediscover rarest US bumblebee 3
Rat monoclonal [HK5.3] to B7 RP1 (Phycoerythrin) ( Abpromise for all tested applications). entrezGeneID: 23308 SwissProtID: O75144...
... with the HECT protein, E6-AP ... Evidence suggests that this E2 ... degradation of non-""N-end rule"" protein ... -acetylated proteins as well as ...
NANS Immunogen: NANS (NP_061819, 260 a.a. ~ 360 a.a) partial recombinant protein with GST tag. Storage: -20 C, Avoid Freeze/Thaw Cycles *Available for distribution in the US only...
ANTI-RAT ADHESION MARKERS, CDs, CYTOKINES, ETC Rat ICAM PE - Mouse IgG1...
Biology Products: