[Zhou, Haiqing; Sun, Jingying] Hunan Normal Univ, Sch Phys & Elect, Minist Educ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Changsha 410081, Hunan, Peoples R China.
[Chen, Shuo; Tian, Fei; Yang, Ze; Xie, Lixin; Ren, Zhifeng; Chen, S; Sun, Jingying] Univ Houston, Dept Phys, Houston, TX 77204 USA.
[Chen, Shuo; Tian, Fei; Yang, Ze; Xie, Lixin; Ren, Zhifeng; Chen, S; Sun, Jingying] Univ Houston, TcSUH, Houston, TX 77204 USA.
[Ren, Muqing] Rice Univ, Dept Chem, Houston, TX 77005 USA.
[Yu, Ying; Yu, Luo] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.