title: Effect of local structure distortion on superconductivity in Mg- and F-codoped LaOBiS2.
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).
authors: CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences , Shanghai 200050, People's Republic of China.
authors: Haijie
authors: H
authors: Chen
authors: Ganghua
authors: G
authors: Zhang
authors: Tao
authors: T
authors: Hu
authors: Gang
authors: G
authors: Mu
authors: Wei
authors: W
authors: Li
authors: Fuqiang
authors: F
authors: Huang
authors: Xiaoming
authors: X
authors: Xie
authors: Mianheng
authors: M
authors: Jiang