Dresden 2011 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 36: SC: Fe-based Superconductors - 122 - Properties, Electronic Structure, Mechanisms

TT 36.5: Talk

Wednesday, March 16, 2011, 15:00–15:15, HSZ 304

Chemical Pressure and Physical Pressure in Phosphorous doped BaFe₂As₂ — •Lina Klintberg¹, S. K. Goh¹, S. Kasahara², Y. Nakai^3,4, K. Ishida^3,4, M. Sutherland¹, T. Shibauchi³, Y. Matsuda³, and T. Terashima² — ¹Cavendish Laboratory, University of Cambridge — ²Research Center for Low Temperature and Materials Sciences, Kyoto University — ³Department of Physics, Graduate School of Science, Kyoto University — ⁴TRIP, JST

Measurements of the superconducting transition temperature, T_c, under pressure via bulk AC susceptibility were carried out on several concentrations of phosphorous substitution in BaFe₂As₂. The pressure dependence of unsubstituted BaFe₂As₂, phosphorous concentration dependence of substituted BaFe₂As₂, as well as the pressure dependence of phosphorous substituted BaFe₂As₂ all point towards an identical maximum T_c of 31 K. This indicates that phosphorous substitution and physical pressure are similar in terms of superconductivity in this compound, and that phosphorous substitution does not induce substantial impurity scattering.