Navigation Links
Award-winning supercomputer application solves superconductor puzzle
Date:8/9/2010

OAK RIDGE, Tenn., August 9, 2010 -- Superconducting materials, which transmit power resistance-free, are found to perform optimally when high- and low-charge density varies on the nanoscale level, according to research performed at the Department of Energy's Oak Ridge National Laboratory.

In research toward better understanding the dynamics behind high-temperature superconductivity, the ORNL scientists rewrote computational code for the numerical Hubbard model that previously assumed copper-compound superconducting materials known as cuprates to be homogenous the same electron density from atom to atom.

Lead author Thomas Maier and colleagues Gonzalo Alvarez, Michael Summers and Thomas Schulthess received the Association for Computing Machinery Gordon Bell Prize two years ago for their high-performance computing application. The application has now been used to examine the nanoscale inhomogeneities in superconductors that had long been noticed but left unexplained.

The paper is published in Physical Review Letters.

"Cuprates and other chemical compounds used as superconductors require very cold temperatures, nearing absolute zero, to transition from a phase of resistance to no resistance," said Jack Wells, director of the Office of Institutional Planning and a former Computational Materials Sciences group leader.

Liquid nitrogen is used to cool superconductors into phase transition. The colder the conductive material has to get to reach the resistance-free superconductor phase, the less efficient and more costly are superconductor power infrastructures. Such infrastructures include those used on magnetic levitation trains, hospital Magnetic Resonance Imaging, particle accelerators and some city power utilities.

In angle-resolved photoemission experiments and transport studies on a cuprate material that exhibits striped electronic inhomogeneity, scientists for years observed that superconductivity is heavily affected by the nanoscale features and in some respect even optimized.

"The goal following the Gordon Bell Prize was to take that supercomputing application and learn whether these inhomogenous stripes increased or decreased the temperature required to reach transition," Wells said. "By discovering that striping leads to a strong increase in critical temperature, we can now ask the question: is there an optimal inhomogeneity?"

In an ideal world, a material could become superconductive at an easily achieved and maintained low temperature, eliminating much of the accompanying cost of the cooling infrastructure.

"The next step in our progress is a hard problem," Wells said. "But from our lab's point of view, all of the major tools suited for studying this phenomenon the computational codes we've written, the neutron scattering experiments that allow us to examine nanoscale properties are available to us here."


'/>"/>

Contact: Bill Cabage
cabagewh@ornl.gov
865-574-4160
DOE/Oak Ridge National Laboratory
Source:Eurekalert

Related biology technology :

1. DOE Labs Take Pride in Award-Winning IBM Blue Gene Series
2. Pitt-led researchers to build foundation for quantum supercomputers with $7.5 million federal grant
3. EStar Award Recognizes Innovative Supercomputer Cooling
4. World record: Julich supercomputer simulates quantum computer
5. Penguin Computing Announces Niveus HTX Personal Supercomputer
6. BOXX Personal Supercomputer for Research Scientists Featured at SC08
7. Applications for the September ISMPP Certified Medical Publication Professional Exam Now Being Accepted
8. Reportlinker Adds Stem Cells Market And Applications. 2009-2015
9. Viscira Announces Version 2.0 of its Online Interactive Slide Kit Builder Application
10. Reportlinker Adds Nanobiotechnologies- Applications, Markets and Companies
11. Sangamo BioSciences and Collaborators Present Data in Fifteen Presentations Highlighting Broad Therapeutic Applications of ZFP Technology
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/24/2017)... Pa., Feb. 24, 2017  VWR Corporation (NASDAQ: VWR), the ... laboratory and production customers, today reported its financial results for ... Highlights: 4Q16 record quarterly ... 1.0% on an organic basis. ... an organic basis, while the Americas net sales increased 2.5%, ...
(Date:2/23/2017)... ... February 23, 2017 , ... BellBrook Labs is formalizing a ... array of biochemical analyses critical for Lead Discovery. The company’s Lead Discovery ... programs, including inhibitor potency and selectivity, mechanism of action, and inhibitor residence times ...
(Date:2/23/2017)... , Feb. 23, 2017  Seattle,s upscale Capitol Hill ... a strange place for a head lice treatment salon to ... between a Tuscan restaurant and a French bistro on E ... perfect. "We aren,t just any old lice clinic, we pride ... feel comfortable, and release some of the stigma associated with ...
(Date:2/23/2017)... , ... February 23, 2017 , ... ... the 12th annual Inventors Recognition Reception at Purdue Research Park of ... faculty member in recognition of outstanding contributions to, and success with, commercializing discoveries ...
Breaking Biology Technology:
(Date:2/8/2017)... NEW YORK , Feb. 7, 2017 /PRNewswire/ ... point. Driven largely by the confluence of organizations, ... users, distaste for knowledge-based systems (password and challenge ... consumer, industrial, and government systems. The market is ... been a demarcation between consumer and enterprise uses ...
(Date:2/7/2017)... Feb. 7, 2017 Zimmer Biomet Holdings, Inc. ... healthcare, will present at the LEERINK Partners 6th Annual ... Hotel on Wednesday, February 15, 2017 at 10 a.m. ... the presentation can be accessed at http://wsw.com/webcast/leerink28/zbh .  ... conference via Zimmer Biomet,s Investor Relations website at ...
(Date:2/3/2017)... 3, 2017  Texas Biomedical Research Institute announced that its ... Schlesinger as the Institute,s new President and CEO. Dr. ... 31, 2017. He is currently the Chair of the Department ... for Microbial Interface Biology at Ohio State University. ... President and CEO of Texas Biomed," said Dr. James ...
Breaking Biology News(10 mins):