Energy News  
ENERGY TECH
Superconductivity above 10 K discovered in a novel quasi-one-dimensional compound K2Mo3As3
by Staff Writers
Beijing, China (SPX) Aug 13, 2018

(a) the schematic crystal structure for K2Mo3As3; (b) the SEM morphology characterization for the fresh fracture surface of the K2Mo3As3 polycrystalline sample; (c) the temperature dependence of electrical resistivity for three typical polycrystalline K2Mo3As3 samples; (d) the temperature dependence of dc magnetic susceptibility for three samples of K2Mo3As3.

In the past century, superconductivity has been observed in thousands of substances with multifarious chemical compositions and crystal structures; however, researchers have still not found an explicit method for discovering new superconductors.

For the unconventional high-Tc superconductors of cuprates and iron pnictides/chalcogenides, the occurrence of superconductivity is highly related to the existence of some certain quasi-two-dimensional structural motifs, e.g., the CuO2 planes or the Fe2As2/Fe2Se2 layers.

Thus, low dimensionality has generally been considered as a favorable ingredient for exotic electron pairing due to the enhancement of electronic correlations.

While among the quasi-one-dimensional (Q1D) compounds, only a few compounds were found to be superconducting at considerably low temperatures of several degrees Kelvin.

Recently, a team led by Prof. Zhian Ren from the Institute of Physics, Chinese Academy of Sciences discovered a Q1D superconductor K2Mo3As3, with a Tc value exceeding 10 K for the first time. Although lots of molybdenum chalcogenide superconductors were discovered from the 1970's, ternary compounds of molybdenum arsenide have rarely been reported.

After many efforts on studying Mo-based ternary phases, the team succeeded in synthesizing the new K2Mo3As3 compound, which crystalizes in a noncentrosymmetric hexagonal structure with typical Q1D (Mo3As3)2- linear chains separated by K+ cations, similar to the structure of K2Mo3As3.

Bulk superconductivity below 10.4 K was confirmed by electrical resistivity, magnetic susceptibility, and heat capacity measurements. The K2Mo3As3 is the first MoAs-based superconductor and possesses the record Tc in all Q1D superconductors.

This discovery indicates that Cr and Mo based Q1D superconductors may share some common underlying origins within the similar structural motifs and will help to uncover the exotic superconducting mechanism in low dimensional materials.

Qing-Ge Mu, Bin-Bin Ruan, Kang Zhao, Bo-Jin Pan, Tong Liu, Lei Shan, Gen-Fu Chen, Zhi-An Ren. Superconductivity at 10.4K in a novel quasi-one-dimensional ternary molybdenum pnictide K2Mo3As3. Science Bulletin, 2018, 63(15) 952-956, doi: 10.1016/j.scib.2018.06.011


Related Links
Science China Press
Powering The World in the 21st Century at Energy-Daily.com


Thanks for being here;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.
SpaceDaily Contributor
$5 Billed Once


credit card or paypal
SpaceDaily Monthly Supporter
$5 Billed Monthly


paypal only


ENERGY TECH
Chinese-American engineer charged with stealing GE technology
Washington (AFP) Aug 2, 2018
A Chinese-American engineer faces charges of stealing valuable technology from General Electric, sneaking it out hidden in a picture of the sunset to take to China, the US Justice Department said. A federal judge on Thursday ordered that Xiaoqing Zheng, 56, be released Friday on $100,000 bond and placed under electronic monitoring while surrendering his passport, according to the United States Attorney's Office for the Northern District of New York. Zheng, a US citizen also believed to have Chin ... read more

Comment using your Disqus, Facebook, Google or Twitter login.



Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle

ENERGY TECH
Electricity crisis leaves Iraqis gasping for cool air

Energy-intensive Bitcoin transactions pose a growing environmental threat

Germany thwarts China by taking stake in 50Hertz power firm

Global quadrupling of cooling appliances to 14 billion by 2050

ENERGY TECH
Scientists design material that can store energy like an eagle's grip

Expanding the limits of Li-ion batteries: Electrodes for all-solid-state batteries

Old mining techniques make a new way to recycle lithium batteries

Scientists create biodegradable, paper-based biobatteries

ENERGY TECH
Searching for wind for the future

Clock starts for Germany's next wind farm

ENGIE: Wind energy footprint firmed up in Norway

Batteries make offshore wind energy debut

ENERGY TECH
Insight into loss processes in perovskite solar cells enables efficiency improvements

Scientists create a UV detector based on nanocrystals synthesized by using ion implantation

China cooling has mixed solar power impact

French energy company ENGIE boasts of solar success

ENERGY TECH
Extreme makeover: Fukushima nuclear plant tries image overhaul

Framatome becomes main distributor of Chesterton valve packing and seals for the nuclear energy industry

SUSI submarine robot enables successful visual Inspection at Asco Nuclear Power Plant

EDF sees new delay, cost overruns for nuclear reactor

ENERGY TECH
Industrial breakthrough in CO2 usage

Scientists discover how to protect yeast from damage in biofuel production

Taming defects in nanoporous materials to put them to a good use

Soil bugs munch on plastics

ENERGY TECH
California, SoCalGas, reach Aliso Canyon gas leak settlement

Faroe Petroleum next up for exploration offshore Norway

Saudi oil policies not swayed by politics

Oil prices stable as tensions balance trade concerns

ENERGY TECH
Ever-increasing CO2 levels could take us back to the tropical climate of Paleogene period

An increase in Southern Ocean upwelling may explain the Holocene CO2 rise

Iraqi farmers fight to save cattle from drought

Sri Lanka waives debt for 200,000 women in drought areas









The content herein, unless otherwise known to be public domain, are Copyright 1995-2024 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. General Data Protection Regulation (GDPR) Statement Our advertisers use various cookies and the like to deliver the best ad banner available at one time. All network advertising suppliers have GDPR policies (Legitimate Interest) that conform with EU regulations for data collection. By using our websites you consent to cookie based advertising. If you do not agree with this then you must stop using the websites from May 25, 2018. Privacy Statement. Additional information can be found here at About Us.