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Scientific article
English

Pressure cycle of superconducting Cs0.8Fe2Se2 : A transport study

Published inSolid state communications, vol. 151, no. 10, p. 747-750
Publication date2011
Abstract

We report measurements of the temperature and pressure dependence of the electrical resistivity (ρ) of single-crystalline iron-based chalcogenide Cs0.8Fe2Se2. In this material, superconductivity with a transition temperature (Tc ) ∼ 30 K develops from a normal state with extremely large resistivity. At ambient pressure, a large ‘‘hump'' in the resistivity is observed around 200 K. Under pressure, the resistivity decreases by two orders of magnitude, concomitant with a sudden Tc suppression around pc ∼ 8 GPa. Even at 9 GPa a metallic resistivity state is not recovered, and the ρ(T ) ‘‘hump'' is still detected. A comparison of the data measured upon increasing and decreasing the external pressure leads us to suggest that the superconductivity is not related to this hump.

Keywords
  • Intercalated Fe chalcogenide
  • Superconductivity
  • High pressure
  • Electrical resistivity
Citation (ISO format)
SEYFARTH, Gabriel et al. Pressure cycle of superconducting Cs<sub>0.8</sub>Fe<sub>2</sub>Se<sub>2</sub> : A transport study. In: Solid state communications, 2011, vol. 151, n° 10, p. 747–750. doi: 10.1016/j.ssc.2011.03.014
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ISSN of the journal0038-1098
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