Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

A Potential Rosetta Stone of High Temperature Superconductivity

08.04.2015

Discovery paves the way to quantitatively investigate the interplay among magnetism, superconductivity and disorder in high temperature superconductors.

The Science


Image courtesy of N. J. Curro (UC Davis) and Los Alamos National Laboratory

Numerical simulation of the magnetic inhomogeneity (red = magnetism, blue = superconductivity) caused by replacing 1% of the indium atoms in a superconductor (CeCoIn5) with cadmium atoms. The field of view is approximately 100 nanometers along each edge. (Cover Image from Seo et al., Nature Physics, 10, February 2014).

High purity single crystals of superconducting material (CeCoIn5) with the highest observed superconducting temperature for a cerium-based material enabled investigation of the relationship among magnetism, superconductivity, and disorder by strategic substitution of certain atoms with others (dopants) in the superconductor.

The Impact

Just as the Rosetta Stone has the same message written in three different scripts giving scholars key insights into ancient languages, the subject material (CeCoIn5), by virtue of its high purity, allows study of the interplay between magnetism, superconductivity, and disorder in three different classes of unconventional superconductors (cuprates, pnictides, and heavy fermions). The versatile model system could help researchers decipher the complex emergent phenomena in different classes of unconventional superconductors and in the development of a complete theory for the high-temperature superconductivity.

Summary

Superconductivity enables the flow of electricity without any loss of energy, but this extremely low temperature phenomenon disappears above a critical temperature (Tc). Since the discovery of a new class of materials in 1986, known as unconventional superconductors, that preserves superconductivity at temperatures much higher than previously known conventional superconductors, the scientific community has been on the quest to learn about the complete mechanisms for the unconventional superconductivity to enable the design of superconducting materials that operate near room temperature.

In general, materials discovery for higher Tc superconductors has been pursued by controlled doping (strategic replacement of certain elements with others) of a starting material with an already high Tc. Although this approach seems to work to certain extent, predicting the superconducting behavior of newly synthesized materials remains a major challenge due to several complexities including the disorder in the crystalline materials.

An international team led by scientists at Los Alamos National Laboratory has demonstrated that the compound CeCoIn5 with incredibly high purity and the highest superconducting temperature for a cerium-based material could serve as an ideal system to investigate the effect of disorder in the materials. Magnetic fluctuations, a driver for unconventional superconductivity, are indeed observed in pristine CeCoIn5, but locally disappear in the material doped with a small amount of cadmium (replacing indium). Surprisingly, the superconducting transition temperature of the doped material remained nearly unaffected.

This work shows that static 'droplets' of magnetism form around the doped atoms, but they do not impact the superconductivity in this material. It is expected that further research on this material will enable deciphering of other aspects of unconventional superconductivity that could pave the way to the development of a more complete theory for this complex emergent phenomenon.

Funding

DOE Office of Science, Basic Energy Sciences program. International support for co-authors was provided by Canada, France, Switzerland, Korea, and China.

Publications

S. Seo, X. Lu, J.-X. Zhu, R. R. Urbano, N. Curro, E. D. Bauer, V. A. Sidorov, T. Park, Z. Fisk, and J. D. Thompson, "Disorder in quantum critical superconductors." Nature Physics 10, 120 (2014).

S. Gerber, M. Bartkowiak, J.L. Gavilano, E. Ressouche, N. Egetenmeyer, C. Niedermayer, A.D. Bianchi, R. Movshovich, E.D. Bauer, J.D. Thompson, and M. Kenzelmann, "Switching of magnetic domains reveals spatially inhomogeneous superconductivity." Nature Physics 10, 126-129 (2014).

Contact Information
Kristin Manke
kristin.manke@science.doe.gov

Kristin Manke | newswise
Further information:
http://www.science.doe.gov

More articles from Physics and Astronomy:

nachricht Seeing the quantum future... literally
16.01.2017 | University of Sydney

nachricht Airborne thermometer to measure Arctic temperatures
11.01.2017 | Moscow Institute of Physics and Technology

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Designing Architecture with Solar Building Envelopes

Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.

As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...

Im Focus: How to inflate a hardened concrete shell with a weight of 80 t

At TU Wien, an alternative for resource intensive formwork for the construction of concrete domes was developed. It is now used in a test dome for the Austrian Federal Railways Infrastructure (ÖBB Infrastruktur).

Concrete shells are efficient structures, but not very resource efficient. The formwork for the construction of concrete domes alone requires a high amount of...

Im Focus: Bacterial Pac Man molecule snaps at sugar

Many pathogens use certain sugar compounds from their host to help conceal themselves against the immune system. Scientists at the University of Bonn have now, in cooperation with researchers at the University of York in the United Kingdom, analyzed the dynamics of a bacterial molecule that is involved in this process. They demonstrate that the protein grabs onto the sugar molecule with a Pac Man-like chewing motion and holds it until it can be used. Their results could help design therapeutics that could make the protein poorer at grabbing and holding and hence compromise the pathogen in the host. The study has now been published in “Biophysical Journal”.

The cells of the mouth, nose and intestinal mucosa produce large quantities of a chemical called sialic acid. Many bacteria possess a special transport system...

Im Focus: Newly proposed reference datasets improve weather satellite data quality

UMD, NOAA collaboration demonstrates suitability of in-orbit datasets for weather satellite calibration

"Traffic and weather, together on the hour!" blasts your local radio station, while your smartphone knows the weather halfway across the world. A network of...

Im Focus: Repairing defects in fiber-reinforced plastics more efficiently

Fiber-reinforced plastics (FRP) are frequently used in the aeronautic and automobile industry. However, the repair of workpieces made of these composite materials is often less profitable than exchanging the part. In order to increase the lifetime of FRP parts and to make them more eco-efficient, the Laser Zentrum Hannover e.V. (LZH) and the Apodius GmbH want to combine a new measuring device for fiber layer orientation with an innovative laser-based repair process.

Defects in FRP pieces may be production or operation-related. Whether or not repair is cost-effective depends on the geometry of the defective area, the tools...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

12V, 48V, high-voltage – trends in E/E automotive architecture

10.01.2017 | Event News

2nd Conference on Non-Textual Information on 10 and 11 May 2017 in Hannover

09.01.2017 | Event News

Nothing will happen without batteries making it happen!

05.01.2017 | Event News

 
Latest News

Multiregional brain on a chip

16.01.2017 | Power and Electrical Engineering

New technology enables 5-D imaging in live animals, humans

16.01.2017 | Information Technology

Researchers develop environmentally friendly soy air filter

16.01.2017 | Power and Electrical Engineering

VideoLinks
B2B-VideoLinks
More VideoLinks >>>