Tropes

www.nanotech-now.com 2015 000075.txt

#Researchers snap-shot fastest observations of superconductivity yet Abstract: An international team of researchers has used infinitely short light pulses to observe ultrafast changes in the electron-level properties of superconductors, setting a new standard for temporal resolution in the field. The scientists--from the Universit Cattolica del Sacro Cuore, the University of British columbia (UBC) and other institutions--liken the new technique to the development of high-speed film capture in the early days of photography.""The solution we devised is based on the use of ultrafast light pulses, lasting 10 femtoseconds or 10 million billionths of a second,"says Claudio Giannetti of the Universit Cattolica del Sacro Cuore, Italy, and an international visiting research scholar at the UBC Peter Wall Institute for Advanced Studies, who coordinated the research. A major hurdle in understanding superconducting properties is determining whether the electron interactions occurring inside the materials are direct and instantaneous, or mediated by some delayed interaction. The advanced techniques--much like the high-speed photography invented by Eadweard Muybridge more than 100 years ago to film galloping horses--helped the researchers'slow down 'and observe the process.""It was an exciting challenge to merge completely different results and approaches, such as ultrafast laser optics, photoelectron spectroscopies, and first-principles theory,"says professor Andrea Damascelli, director of UBC's Quantum Matter Institute (QMI) and senior fellow with the Canadian Institute for Advanced Research Quantum Materials Program. Damascelli led UBC's research component of the project. The snap-shot observations, detailed this week in Nature Physics, support the hypothesis that electron interactions are delayed and mediated by their interaction with the spin and magnetic pull of other electrons. The process took only 10 femtoseconds--something that up till now, material scientists had been unable to directly observe. Adds Damascelli, "These international collaborations are vital to achieving this calibre of work, and the possibility of combining cutting-edge photoelectron spectroscopies with state-of-the-art ultrafast techniques will be an exciting new avenue in UBC's research portfolio as our capacities grow."#"##International Collaboratorsthe research also included researchers from Politecnico of Milan, SISSA in Trieste, and the Jo? ef Stefan Institute in Ljubljana, Slovenia. This is part of an ongoing collaboration between QMI and the ultrafast optics groups in Europe. Damascelli and Giannetti have been awarded a Peter Wall Institute International Scholarship aimed at reinforcing their collaboration and developing novel experimental ideas and dedicated infrastructure based at UBC. About CIFARCIFAR creates knowledge that is transforming our world. Established in 1982, the Institute brings together interdisciplinary groups of extraordinary researchers from around the globe to address questions and challenges of importance to the world. Our networks help support the growth of research leaders and are catalysts for change in business, government and society. CIFAR is supported generously by the governments of Canada, British columbia, Alberta, Ontario and Quebec, Canadian and international partners, as well as individuals, foundations and corporations. CIFAR's program in Quantum Materials invents and explores materials whose novel and unusual electronic properties, like superconductivity, could revolutionize technology.#####For more information, please click herecontacts: Chris Balmawriteemail('science. ubc. ca','balma';'604-822-5082copyright#University of British Columbiaissuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content. Bookmark: Snapshots of the retarded interaction of charge carriers with ultrafast fluctuations in cuprates News and information High performance, lightweight supercapacitor electrodes of the future March 10th, 2015advantest to Exhibit at SEMICON China in Shanghai, China, March 17-19: Showcasing Broad Portfolio of Semiconductor Products, Technologies and Solutions March 10th, 2015are current water treatment methods sufficient to remove harmful engineered nanoparticle? 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