La(Zn1−2xMnxCux)AsO: A 1111-type diluted magnetic semiconductor with manganese and copper codoping at Zn sitesShengli Guo, Yao Zhao, Xin Gong, Huiyuan Man, Cui Ding, Guoxiang Zhi, Licheng Fu, Yilun Gu, Hangdong Wang, Bin Chen, Yang Guo and F. L. NingEPL, 114 5 (2016) 57008DOI: https://doi.org/10.1209/0295-5075/114/57008