title: Relaxation dynamics in the strong chalcogenide glass-former of Ge22Se78.
abstract: The enthalpy relaxation is performed in the glassy Ge22Se78to understand the dynamic behaviors. The structure of the glass is examined by X-ray diffraction and Raman spectra. The dynamic parameters such as the fragility, stretching exponent and non-linear factor are determined. A low fragility of m = 27 is exhibited for the chalcogenide, however, the stretching exponent is found not to have a larger value. The enthalpy relaxation spectra are constructed for various glass formers, and a relationship between the fragility and the symmetry of the spectra is demonstrated. The dynamic results are used to evaluate the structure of the Ge22Se78glass.
authors.affiliation: State Key Lab of Metastable Materials Science and Technology, and College of Materials Science and Engineering, Yanshan University, Qinhuangdao, Hebei, 066004, China.
authors.forename: Pengfei
authors.initials: P
authors.lastname: Li
authors.affiliation: State Key Lab of Metastable Materials Science and Technology, and College of Materials Science and Engineering, Yanshan University, Qinhuangdao, Hebei, 066004, China.
authors.forename: Yaqi
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: State Key Lab of Metastable Materials Science and Technology, and College of Materials Science and Engineering, Yanshan University, Qinhuangdao, Hebei, 066004, China.
authors.forename: Zeming
authors.initials: Z
authors.lastname: Chen
authors.affiliation: State Key Lab of Metastable Materials Science and Technology, and College of Materials Science and Engineering, Yanshan University, Qinhuangdao, Hebei, 066004, China.
authors.forename: Peng
authors.initials: P
authors.lastname: Gao
authors.affiliation: State Key Lab of Metastable Materials Science and Technology, and College of Materials Science and Engineering, Yanshan University, Qinhuangdao, Hebei, 066004, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Wu
authors.affiliation: State Key Lab of Metastable Materials Science and Technology, and College of Materials Science and Engineering, Yanshan University, Qinhuangdao, Hebei, 066004, China.
authors.forename: Li-Min
authors.initials: LM
authors.lastname: Wang