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.

*This work was supported by AFOSR-MURI grant FA9550-09-1-0603 (UK and PCC) and by US DOE under the Contract No. DE-AC02-07CH11358 (SLB).

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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