scholarly journals Sound attenuation in finite-temperature stable glasses

Soft Matter ◽  
2020 ◽  
Vol 16 (30) ◽  
pp. 7165-7171 ◽  
Author(s):  
Lijin Wang ◽  
Grzegorz Szamel ◽  
Elijah Flenner
Keyword(s):  
Finite Temperature ◽  
Sound Attenuation ◽  
Model Glass ◽  
Stable Glasses ◽  
The Stability

We find that sound attenuation changes dramatically with the stability and the temperature of a model glass former.

FUNCTIONAL INTEGRALS AND PHASE STRUCTURES IN SINE-GORDON–THIRRING MODEL

2012 ◽  
Vol 26 (27) ◽  
pp. 1250178 ◽  
Author(s):  
JUN YAN
Keyword(s):  
Strong Coupling ◽  
Finite Temperature ◽  
Thirring Model ◽  
Attractive Potential ◽  
Functional Integrals ◽  
One Dimensional ◽  
Phase Structures ◽  
Coexistence Phase ◽  
Coupling Case ◽  
The Stability

The phase structures of one-dimensional quantum sine-Gordon–Thirring model with N-impurities coupling are studied in this paper. The effective actions at finite temperature are derived by means of the perturbation and non-perturbation functional integrals method. The stability of coexistence phase is analyzed respectively in the weak and strong coupling case. It is shown that the coexistence phase is not stable when fermions have an attractive potential g < 0, and the stable coexistence phase can form when fermions have an exclude potential g > 0.

Phase Stability of the Sigma Phase in Fe-Cr Based Alloys

1995 ◽  
Vol 408 ◽  
Author(s):  
Marcel Il. F ◽  
Sluiter. Koivan Esfurjani ◽  
Yoshiyuki Kawazoe
Keyword(s):  
Total Energy ◽  
Phase Stability ◽  
First Principles ◽  
Finite Temperature ◽  
Sigma Phase ◽  
Complex Structure ◽  
Unit Cell ◽  
Energy Calculations ◽  
Cluster Variation ◽  
The Stability

AbstractThe FeCr sigma phase is a good example of a complex structure: it. has 30 atoms in the unit cell and 5 inequivalent lattice sites, and it belongs to the class of tetrahedrally close packed structures, also known as Frank-Kaspar structures. So far. such structures have riot been treated within a first-principles statistical thermodynamics framework. It will be shown that dtlme to advances in algorithms and hardware important features of the phase stability of complex phases can be computed. The factors which affect the stability of the sigma phase have been studied using carefully selected supercells for electronic total energy calculations. cluster variation calc:ulations in the tet.rahedron approximation were performed to evaluate the effect of partial disorder and of finite temperature. The preferred occupancy of the 5 lattice sites has been investigated and is compared with experimental determinations.

scholarly journals Finite-Temperature Effects on the Stability and Infrared Spectra of HCl(H2O)6Clusters†

2007 ◽  
Vol 111 (49) ◽  
pp. 12810-12815 ◽  
Author(s):  
U. F. T. Ndongmouo ◽  
M.-S. Lee ◽  
R. Rousseau ◽  
F. Baletto ◽  
S. Scandolo
Keyword(s):  
Infrared Spectra ◽  
Finite Temperature ◽  
Temperature Effects ◽  
The Stability

scholarly journals Effects of microstructure formation on the stability of vapor-deposited glasses

2019 ◽  
Vol 116 (13) ◽  
pp. 5937-5942 ◽  
Author(s):  
Alex R. Moore ◽  
Georgia Huang ◽  
Sarah Wolf ◽  
Patrick J. Walsh ◽  
Zahra Fakhraai ◽  
...  
Keyword(s):  
Free Surface ◽  
Physical Vapor Deposition ◽  
Relaxation Times ◽  
Tail Length ◽  
Supercooled Liquid ◽  
Liquid Films ◽  
Coarse Grained ◽  
New Class ◽  
Stable Glasses ◽  
The Stability

Glasses formed by physical vapor deposition (PVD) are an interesting new class of materials, exhibiting properties thought to be equivalent to those of glasses aged for thousands of years. Exerting control over the structure and properties of PVD glasses formed with different types of glass-forming molecules is now an emerging challenge. In this work, we study coarse-grained models of organic glass formers containing fluorocarbon tails of increasing length, corresponding to an increased tendency to form microstructures. We use simulated PVD to examine how the presence of the microphase-separated domains in the supercooled liquid influences the ability to form stable glasses. This model suggests that increasing molecule tail length results in decreased thermodynamic stability of the molecules in PVD films. The reduced stability is further linked to the reduced ability of these molecules to equilibrate at the free surface during PVD. We find that, as the tail length is increased, the relaxation times near the surface of the supercooled equilibrium liquid films of these molecules are slowed and become essentially bulk-like, due to the segregation of the fluorocarbon tails to the free surface. Surface diffusion is also markedly reduced due to clustering of the molecules at the surface. Based on these results, we propose a trapping mechanism where tails are unable to move between local phase-separated domains on the relevant deposition time scales.

STABILITY OF STRANGELETS IN THE QUARK MASS DENSITY- AND TEMPERATURE-DEPENDENT MODEL

2003 ◽  
Vol 18 (02n06) ◽  
pp. 143-146 ◽  
Author(s):  
YUN ZHANG ◽  
RU-KENG SU
Keyword(s):  
Finite Temperature ◽  
Quark Mass ◽  
Mass Density ◽  
Baryon Number ◽  
Temperature Dependent ◽  
Dependent Model ◽  
The Stability ◽  
Temperature Dependent Model

By means of the quark mass density- and temperature-dependent model, we have investigated the stability of strangelets at finite temperature. We have found two stable strangelets for the baryon number A equal to five and the temperature 20MeV.

CFL STRANGE QUARK MATTER AT FINITE TEMPERATURE

2007 ◽  
Vol 16 (09) ◽  
pp. 2851-2854
Author(s):  
L. PAULUCCI ◽  
J. E. HORVATH
Keyword(s):  
Ground State ◽  
Quark Matter ◽  
Finite Temperature ◽  
Strange Quark ◽  
Strange Quark Matter ◽  
Cooper Pairs ◽  
Baryonic Matter ◽  
Strange Quarks ◽  
Mit Bag Model ◽  
The Stability

The strange quark matter (SQM) hypothesis states that it is possible that the ground state of cold baryonic matter is a plasma composed roughly of equal numbers of up, down and strange quarks. This stability scenario is even more favorable if quarks are in a color flavor locked (CFL) state, in which quarks form pairs resembling the superconductivity Cooper pairs. We present calculations on the basis of the MIT Bag Model for the stability windows for SQM in the CFL state and for the energy of strangelets at non-zero temperatures, comparing with the unpaired SQM. We also discuss some astrophysical implications of such results.

scholarly journals Sound attenuation in stable glasses

Soft Matter ◽  
2019 ◽  
Vol 15 (35) ◽  
pp. 7018-7025 ◽  
Author(s):  
Lijin Wang ◽  
Ludovic Berthier ◽  
Elijah Flenner ◽  
Pengfei Guan ◽  
Grzegorz Szamel
Keyword(s):  
Sound Attenuation ◽  
Wide Range ◽  
Stable Glasses

We examine the wavevector dependence of sound attenuation in simulated glasses with a wide range of stabilities.

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