Community structure detection based on Potts model and network's spectral characterization Hui-Jia Li, Yong Wang, Ling-Yun Wu, Zhi-Ping Liu, Luonan Chen and Xiang-Sun Zhang EPL, 97 4 (2012) 48005 Published online: 21 February 2012 DOI: 10.1209/0295-5075/97/48005