The formation of a charge layer at the interface of GaMnAs and an organic material Wenjin Chen, Baikui Li, Hongtao He, Jiannong Wang, Hoi Lam Tam, Kok Wai Cheah, Xiancun Cao, Yuqi Wang, Guijun Lian and Guangcheng Xiong EPL, 88 4 (2009) 46002 Published online: 03 December 2009 DOI: 10.1209/0295-5075/88/46002