Effect of local structure distortion on superconductivity in Mg- and F-codoped LaOBiS2

Haijie Chen; Ganghua Zhang; Tao Hu; Gang Mu; Wei Li; Fuqiang Huang; Xiaoming Xie; Mianheng Jiang

doi:10.1021/ic4021993

Effect of local structure distortion on superconductivity in Mg- and F-codoped LaOBiS2

Inorg Chem. 2014 Jan 6;53(1):9-11. doi: 10.1021/ic4021993. Epub 2013 Dec 9.

Authors

Haijie Chen¹, Ganghua Zhang, Tao Hu, Gang Mu, Wei Li, Fuqiang Huang, Xiaoming Xie, Mianheng Jiang

Affiliation

¹ CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences , Shanghai 200050, People's Republic of China.

PMID: 24320566
DOI: 10.1021/ic4021993

Abstract

La1-xMgxO1-2xF2xBiS2 (x = 0.1-0.35) were synthesized, and their superconductive properties were investigated. The superconducting transition temperature (Tc) increased below the codoping level (x ≤ 0.25). La1-xMgxOBiS2 (x = 0-0.2) and La1-xMgxO0.6F0.4BiS2 (x = 0.1-0.3) were further prepared to explore the effect of Mg(2+). We found that the introduction of Mg(2+) and F(-) leads to local structure distortion. Larger distortion is beneficial for superconductivity in LaOBiS2, which was further confirmed by the results in La1-xCaxO1-2xF2xBiS2 (x = 0.2, 0.3).