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- W2138735524 abstract "Three different types of glasses, a mono-atomic soft sphere glass, amorphous selenium and amorphous CuZr, have been studied by molecular dynamics simulations. The vibrational spectrum at low temperatures shows excess vibrations which form the so called boson peak. These can be understood as resonant modes (low frequency quasi localized modes). These modes interact strongly with the sound waves and at the boson peak frequency these become over-damped and the different modes are completely intermixed. In a basis of sound waves and low frequency local modes, the latter can be described by the soft potential model. These modes are collective motions of chains of around 20 atoms. The same chain structures are observed in the relaxations in the glass. With increasing temperature both the total jump length and the number of participating atoms increases. In the melt of CuZr, additionally to this collective motion, jumps of Cu atoms into nearest neighbor sites are observed." @default.
- W2138735524 created "2016-06-24" @default.
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- W2138735524 date "1999-01-01" @default.
- W2138735524 modified "2023-09-26" @default.
- W2138735524 title "Molecular dynamics in amorphous solids and liquids" @default.
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- W2138735524 doi "https://doi.org/10.1063/1.1301459" @default.
- W2138735524 hasPublicationYear "1999" @default.
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