Pressure enhanced superconductivity at 10 K in La doped EuBiS

Author: Thakur Gohil S   Jha Rajveer   Haque Zeba   Awana V P S   Gupta L C   Ganguli A K  

Publisher: IOP Publishing

E-ISSN: 1361-6668|28|11|115010-115014

ISSN: 0953-2048

Source: Superconductor Science and Technology, Vol.28, Iss.11, 2015-11, pp. : 115010-115014

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

Previous Menu Next

Abstract

We have investigated the effect of La doping and high pressure on superconducting properties of EuBiS2F, which is a newly discovered superconducting material (T c ∼ 0.3 K) (Zhai et al (2014) Phys. Rev. B 90 064518). An enhancement of T c to 2.2 K is observed in Eu0.5La0.5BiS2F. Upon application of pressure T c is further enhanced up to ∼10 K (P = 2.5 GPa). Eu0.5La0.5BiS2F is semiconducting down to 3 K. The onset of a superconductivity-like feature is seen at 2.2 K at ambient pressure. At a pressure above 1.38 GPa, the &${{T}_{{rm{c}}}}^{{rm{onset}}}$; remains invariant at 10 K but the T c(ρ = 0) is increased to above 8.2 K. There is a possible crystallographic transformation by application of pressure from a structure of low T c to a structure corresponding to high T c.