Li Qiao-Qiao, Han Wen-Peng, Zhao Wei-Jie, Lu Yan, Zhang Xin, Tan Ping-Heng, Feng Zhi-Hong, Li Jia. Raman spectra of monoand bi-layer graphenes with ion-induced defects-and its dispersive frequency on the excitation energyJ. Acta Physica Sinica, 2013, 62(13): 137801. DOI: 10.7498/aps.62.137801