Directional Heat and Charge Transport Studies of Unconventional Superconductors

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Date/Time:Monday, 09 Apr 2012 from 4:00 pm to 4:50 pm
Location:Physics Hall Room 5
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Dr. Makariy Tanatar (Ames Laboratory)

Abstract: Measurements of heat and charge transport in superconductors provide direct access to the excitation spectrum of normal quasiparticles, which is needed to be determined to obtain clues to the mechanisms of superconductivity. Magnetic fluctuations - mediated mechanisms of superconductivity are becoming more and more popular for the explanation of superconducting and normal state properties of various exotic superconductors. These include the families of the compounds with highest transition temperatures, high - Tc cuprates and the most recent addition, - iron arsenides. I will discuss new insights into the problem obtained from the analysis of directional transport measurements in the normal and superconducting states. I will particularly focus on iron arsenides, with an aim to understand their normal state phase diagram and its relation to the anisotropy of the superconducting gap and of the pairing interactions.

Bio: Makariy Tanatar got his M.Sc. from Dnipropetrovsk State University, Ukraine, and Ph.D. from National Academy of Science of Ukraine, where he later took a position of Senior Research Scientist. He was working in Japan Science and Technology Corporation/Department of Physics, Kyoto University, University of Toronto, and University of Sherbrooke, Canada, before joining Ames laboratory in 2008. Dr. Tanatar was recipient of Japan Society for the Promotion of Sciences fellowship, and was granted visiting professor positions at ISSP, University of Tokyo and National Institute for Molecular Sciences, Okazaki, Japan. His research focuses on unconventional superconductivity in a broad class of materials, including iron pnictides, heavy fermions CeCoIn5 and kappa-phase organic superconductors.