Low-frequency vibrations in a model glass
作者： H. R. Schober , C. Oligschleger
DOI: 10.1103/PHYSREVB.53.11469
关键词: Maxima 、 Low frequency vibration 、 Specific heat 、 Physics 、 Molecular physics 、 Spectral density 、 Vibration 、 Delocalized electron 、 Molecular vibration 、 Condensed matter physics 、 Phonon
摘要: Previous simulation studies of localized low-frequency vibrational modes in a soft sphere glass are extended to larger samples. We find boson peak the spectral density and maximum specific heat divided by T similar experiment. These maxima caused ~quasi!localized vibrations. For finite frequencies these interact strongly with each other phonons. This leads an overdamping phonons around delocalization modes. A procedure split resulting into their bare constituents is presented. The found have low-dimensional structure. description terms potential model essentially verified.
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sci-hub.se 参考文章(39)
R. C. Zeller, R. O. Pohl, Thermal Conductivity and Specific Heat of Noncrystalline Solids Physical Review B. ,vol. 4, pp. 2029- 2041 ,(1971) , 10.1103/PHYSREVB.4.2029
P. w. Anderson, B. I. Halperin, c. M. Varma, Anomalous low-temperature thermal properties of glasses and spin glasses Philosophical Magazine. ,vol. 25, pp. 1- 9 ,(1972) , 10.1080/14786437208229210
W. A. Phillips, Tunneling states in amorphous solids Journal of Low Temperature Physics. ,vol. 7, pp. 351- 360 ,(1972) , 10.1007/BF00660072
G. Winterling, Very-low-frequency Raman scattering in vitreous silica Physical Review B. ,vol. 12, pp. 2432- 2440 ,(1975) , 10.1103/PHYSREVB.12.2432
U. Buchenau, H. M. Zhou, N. Nucker, K. S. Gilroy, W. A. Phillips, Structural relaxation in vitreous silica. Physical Review Letters. ,vol. 60, pp. 1318- 1321 ,(1988) , 10.1103/PHYSREVLETT.60.1318
K. Inoue, T. Kanaya, S. Ikeda, K. Kaji, K. Shibata, M. Misawa, Y. Kiyanagi, Low‐energy excitations in amorphous polymers Journal of Chemical Physics. ,vol. 95, pp. 5332- 5340 ,(1991) , 10.1063/1.461647
U. Buchenau, Yu. M. Galperin, V. L. Gurevich, H. R. Schober, Anharmonic potentials and vibrational localization in glasses Physical Review B. ,vol. 43, pp. 5039- 5045 ,(1991) , 10.1103/PHYSREVB.43.5039
U. Buchenau, Yu. M. Galperin, V. L. Gurevich, D. A. Parshin, M. A. Ramos, H. R. Schober, Interaction of soft modes and sound waves in glasses Physical Review B. ,vol. 46, pp. 2798- 2808 ,(1992) , 10.1103/PHYSREVB.46.2798
Brian B. Laird, H. R. Schober, Localized low-frequency vibrational modes in a simple model glass. Physical Review Letters. ,vol. 66, pp. 636- 639 ,(1991) , 10.1103/PHYSREVLETT.66.636
H. R. Schober, Brian B. Laird, Localized low-frequency vibrational modes in glasses. Physical Review B. ,vol. 44, pp. 6746- 6754 ,(1991) , 10.1103/PHYSREVB.44.6746