Hydrostatic pressure effect on T c of new BiS 2 -based Bi 4 O 4 S 3 and NdO 0.5 F 0.5 BiS 2 layered superconductors

  • Kalai Selvan G
  • Kanagaraj M
  • Esakki Muthu S
 et al. 
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Abstract

We investigate the external hydrostatic pressure effect on the superconducting transition temperature (Tc) of new layered superconductors Bi4O4S3 and NdO0.5F0.5BiS2. Though the Tc is found to have moderate decrease from 4.8 K to 4.3 K (dTconset/dP = -0.28 K/GPa) for Bi4O4S3 superconductor, the same increases from 4.6 K to 5 K (dTconset/dP = 0.44 K/GPa) upto 1.31 GPa followed by a sudden decrease from 5 K to 4.7 K upto 1.75 GPa for NdO0.5F0.5BiS2 superconductor. The variation of Tc in these systems may be correlated to increase or decrease of the charge carriers in the density of states under externally applied pressure.

Author-supplied keywords

  • bi 4 o 4
  • bis 2
  • f
  • hydrostatic pressure
  • nd
  • o
  • s 3
  • superconductivity

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Authors

  • G. Kalai Selvan

  • M. Kanagaraj

  • S. Esakki Muthu

  • Rajveer Jha

  • V. P. S. Awana

  • S. Arumugam

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