Topics

Relation between Heterogeneous Frozen Regions in Supercooled Liquids and Non-Debye Spectrum in the Corresponding Glasses.

08:00 EDT 11th October 2019 | BioPortfolio

Summary of "Relation between Heterogeneous Frozen Regions in Supercooled Liquids and Non-Debye Spectrum in the Corresponding Glasses."

Recent numerical studies on glassy systems provide evidence for a population of non-Goldstone modes (NGMs) in the low-frequency spectrum of the vibrational density of states D(ω). Similarly to Goldstone modes (GMs), i.e., phonons in solids, NGMs are soft low-energy excitations. However, differently from GMs, NGMs are localized excitations. Here we first show that the parental temperature T^{*} modifies the GM/NGM ratio in D(ω). In particular, the phonon attenuation is reflected in a parental temperature dependency of the exponent s(T^{*}) in the low-frequency power law D(ω)∼ω^{s(T^{*})}, with 2≤s(T^{*})≤4. Second, by comparing s(T^{*}) with s(p), i.e., the same quantity obtained by pinning a p particle fraction, we suggest that s(T^{*}) reflects the presence of dynamical heterogeneous regions of size ξ^{3}∝p. Finally, we provide an estimate of ξ as a function of T^{*}, finding a mild power law divergence, ξ∼(T^{*}-T_{d})^{-α/3}, with T_{d} the dynamical crossover temperature and α falling in the range α∈[0.8,1.0].

Affiliation

Journal Details

This article was published in the following journal.

Name: Physical review letters
ISSN: 1079-7114
Pages: 155502

Links

DeepDyve research library

PubMed Articles [8334 Associated PubMed Articles listed on BioPortfolio]

Nature of the floppy-to-rigid transition in chalcogenide glass-forming liquids.

The viscoelastic properties of supercooled AsSe and GeSe (0 ≤ x ≤ 30) liquids are studied using oscillatory parallel plate rheometry. The liquids with average selenium chain segment length L longe...

Direct imaging of structural disordering and heterogeneous dynamics of fullerene molecular liquid.

Structural rearrangements govern the various properties of disordered systems and visualization of these dynamical processes can provide critical information on structural deformation and phase transf...

Understanding the Origin of the Breakdown of the Stokes-Einstein Relation in Supercooled Water at Different Temperature-Pressure Conditions.

A recent experiment has measured the viscosity of water down to approximately 244 K temperature and up to 300 MPa pressure. The correct viscosity and translational diffusivity data at various temperat...

Discerning the structure factor of charged micelles in water and supercooled solvent by contrast variation X-ray scattering.

Sodium dodecyl sulfate (SDS) is a well known anionic surfactant that forms micelles in various solvents including supercooled sugar-urea melt. Here, we explore the application of contrast variation sm...

Frozen sections and complete resection in oral cancer surgery.

Although the reliability of frozen sections for the intraoperative assessment of complete tumour excision has been established, the best location for collection and the impact of the type of sampling ...

Clinical Trials [2400 Associated Clinical Trials listed on BioPortfolio]

Physiological Flow of Liquids in Head and Neck Cancer Patients: A Pilot Study

This study is part of a larger grant, for which the overall goal is to collect measurements of liquid flow through the oropharynx (i.e., mouth and throat) during swallowing.The focus of th...

Fresh Frozen Plasma in Cardiac Surgery: Descriptive and Prognostic Study

Despite experts’ recommendations, the consumption of Fresh frozen plasma (FFP) is very heterogeneous among French cardiac surgery centers. This probably reflects heterogeneous practices ...

Respiratory Capacity and Swallowing Function in Spinal Disorders: A Pilot Study

This study is part of a larger grant, for which the overall goal is to collect measurements of liquid flow through the oropharynx (i.e., mouth and throat) during swallowing.The focus of th...

Physiological Flow of Liquids in Healthy Swallowing

Thickened liquids are commonly used as an intervention for people with dysphagia (swallowing impairment). However, the field currently lacks a proper understanding of how this intervention...

Trial of Low Residue Diet Versus Clear Liquids Following Elective Colorectal Surgery

Prospective randomized controlled trial investigating commencement of low residue diet versus clear liquids on postoperative zero following elective colorectal surgery, with regards to pat...

Medical and Biotech [MESH] Definitions

Thinly cut sections of frozen tissue specimens prepared with a cryostat or freezing microtome.

A frozen dairy food made from cream or butterfat, milk, sugar, and flavorings. Frozen custard and French-type ice creams also contain eggs.

Preparation for electron microscopy of minute replicas of exposed surfaces of the cell which have been ruptured in the frozen state. The specimen is frozen, then cleaved under high vacuum at the same temperature. The exposed surface is shadowed with carbon and platinum and coated with carbon to obtain a carbon replica.

Silicone polymers which consist of silicon atoms substituted with methyl groups and linked by oxygen atoms. They comprise a series of biocompatible materials used as liquids, gels or solids; as film for artificial membranes, gels for implants, and liquids for drug vehicles; and as antifoaming agents.

The parts of the messenger RNA sequence that do not code for product, i.e. the 5' UNTRANSLATED REGIONS and 3' UNTRANSLATED REGIONS.

Quick Search


DeepDyve research library

Searches Linking to this Article