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- W2950384721 abstract "We show that incoherent quasi-elastic neutron scattering (QENS) from molecular liquids reveals a dynamic two-state scenario where, on a 1 ps timescale, molecules are either highly confined or free to undergo relatively large excursions. We observe exchange between these two states, providing a mechanism for relaxation by which has long been suspected as an important mode of transport in supercooled liquids at temperatures below the mode-coupling critical temperature,$T_c$. We show also that this two-state scenario holds above $T_c$, where the lifetime of the two states exhibits similar behavior among all the liquids studied here. We provide evidence that hopping may be important at temperatures up to $1.5, T_c$, in addition to its long-suspected low-temperature role. We also argue that the dynamic heterogeneity we observe arises from structural fluctuations rather than energy fluctuations." @default.
- W2950384721 created "2019-06-27" @default.
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- W2950384721 date "2013-10-23" @default.
- W2950384721 modified "2023-09-27" @default.
- W2950384721 title "Two-State Hopping Dynamics in Molecular Liquids and Glasses" @default.
- W2950384721 hasPublicationYear "2013" @default.
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