Search for chalcogenide based superconductors: Sulfur based solution growth

ORAL

Abstract

As part of our effort to develop tools for searching for new chalcogenide based superconductors we are expanding the range of S-based binary melts that we can use for solution growth of single crystals. As a recent example, we have been able to grow single crystals of Rh$_{17}$S$_{15}$ and separate them for excess binary melt via high temperature decanting. In addition to refining the details of the Rh-S binary phase diagram, microscopic, thermodynamic and transport measurement on Rh$_{17}$S$_{15}$ crystals confirm their T$_{c}$ $\sim$ 5.5 K as well as their remarkably large H$_{c2}$(T) behavior. The possible cause of the enhanced H$_{c2}$(T) will be discussed. As time allows we will also review other S-based growths and compounds.

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Authors

  • Udhara Kaluarachchi

    Department of Physics, Iowa State University

  • Sergey Bud'ko

    The Ames Laboratory, Iowa State University, Ames, USA, Ames Laboratory U.S. DOE and Department of Physics and Astronomy, Iowa State University, Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames Laboratory, US DOE, Iowa State University, Department of Physics, Iowa State University, Ames Laboratory, US DOE, and Dept. of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA

  • Paul Canfield

    Ames Laboratory and Iowa State University, The Ames Laboratory, Iowa State University, Ames, USA, Ames Laboratory U.S. DOE and Department of Physics and Astronomy, Iowa State University, Ames Laboratory, US DOE, Iowa State University, Department of Physics, Iowa State University, Iowa State University