Effect of temperature and density fluctuations on the spatially heterogeneous dynamics of glass-forming Van der Waals liquids under high pressure

Effect of temperature and density fluctuations on the spatially heterogeneous dynamics of glass-forming Van der Waals liquids under high pressure

In this Letter, we show how temperature and density fluctuations affect the spatially heterogeneous dynamics at ambient and elevated pressures. By using high-pressure experimental data for van der Waals liquids, we examine contributions of the temperature and density fluctuations to the dynamics het...

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Veröffentlicht in:Physical review letters 2013-09, Vol.111 (12), p.125701-125701, Article 125701
Hauptverfasser: Koperwas, K, Grzybowski, A, Grzybowska, K, Wojnarowska, Z, Sokolov, A P, Paluch, M
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container_end_page 125701
container_issue 12
container_start_page 125701
container_title Physical review letters
container_volume 111
creator Koperwas, K
Grzybowski, A
Grzybowska, K
Wojnarowska, Z
Sokolov, A P
Paluch, M
description In this Letter, we show how temperature and density fluctuations affect the spatially heterogeneous dynamics at ambient and elevated pressures. By using high-pressure experimental data for van der Waals liquids, we examine contributions of the temperature and density fluctuations to the dynamics heterogeneity. We show that the dynamic heterogeneity decreases significantly with increasing pressure at a constant structural relaxation time (isochronal condition), while the broadening of the relaxation spectrum remains constant. This observation questions the relationship between spectral broadening and dynamic heterogeneity.
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title Effect of temperature and density fluctuations on the spatially heterogeneous dynamics of glass-forming Van der Waals liquids under high pressure
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