Combined effects of chemical doping and pressure on physical properties of CaFe$_{2}$As$_{2}$
ORAL
Abstract
The AFe$_{2}$As$_{2}$ compounds (A = alkaline earth) are the most extensively studied materials among the FeAs-based superconductors, and CaFe$_{2}$As$_{2}$ is the most pressure sensitive among them. The structural/magnetic phase transition near 170K is suppressed rapidly under pressure and a nonmagnetic, collapsed tetragonal phase is stabilized. Depending on the hydrostaticity of the pressure medium, the superconducting phase may or may not be induced. In this talk we will present the combined effects of chemical doping and pressure on the structural/magnetic phase transition as well as the collapsed tetragonal structure phase transition in an attempt to better understand the interactions between these phases.
*Supported by U.S. DOE (DE-AC02-07CH11358), AFOSR-MURI (FA9550-09-1-0603), and NSF (DMR-0805335).
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Authors
Sheng Ran
Ames Laboratory U.S. DOE and Department of Physics and Astronomy, Iowa State University
Department of Physics and Astronomy and Ames Laboratory-USDOE, Iowa State University
Sergey Bud'ko
Ames Laboratory US DOE and Dept. of Physics and Astronomy, ISU, Ames, IA 50011, USA and SPSMS, UMR-E CEA/UJF-Grenoble 1, INAC, 38054 Grenoble, France
Ames Laboratory U.S. DOE and Department of Physics and Astronomy, Iowa State University
Department of Physics and Astronomy and Ames Laboratory-USDOE, Iowa State University
Department of Physics and Astronomy, Iowa State University and Ames Laboratory
Paul Canfield
Ames Laboratory, Iowa State University
Ames Laboratory U.S. DOE and Department of Physics and Astronomy, Iowa State University
Department of Physics and Astronomy and Ames Laboratory-USDOE, Iowa State University
Department of Physics and Astronomy, Iowa State University and Ames Laboratory
Ames Laboratory and Iowa State University
Ames Laboratory and Department of Physics, Iowa State University
