[Zhang, F.; Luo, D.; Jiang, L.; Yu, L.; Ren, Z.; Ren, W.] Univ Houston, Dept Phys, Houston, TX 77204 USA.
[Zhang, F.; Luo, D.; Jiang, L.; Yu, L.; Ren, Z.; Ren, W.] Univ Houston, TcSUH, Houston, TX 77204 USA.
[Zhang, F.] Univ Houston, Dept Chem, Univ Pk, Houston, TX 77204 USA.
[Wang, Z.; Ren, W.] Univ Elect Sci & Technol China, Inst Fundamental & Frontier Sci, Chengdu 610054, Sichuan, Peoples R China.
[Yu, Y.; Yu, L.] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.