Results 11 to 20 of about 154,329 (250)

Viscosity bound for anisotropic superfluids in higher derivative gravity [PDF]

open access: yes, 2015
In the present paper, based on the principles of gauge/gravity duality we analytically compute the shear viscosity to entropy ratio corresponding to the superfluid phase in Einstein Gauss-Bonnet gravity.
Bhattacharyya, Arpan   +1 more
core   +2 more sources

Searching for Next Single-Phase High-Entropy Alloy Compositions

open access: yesEntropy, 2013
There has been considerable technological interest in high-entropy alloys (HEAs) since the initial publications on the topic appeared in 2004. However, only several of the alloys investigated are truly single-phase solid solution compositions.
David E. Alman, Michael C. Gao
doaj   +1 more source

Prediction of grain boundary chemistry in multicomponent alloys

open access: yesScience and Technology of Advanced Materials: Methods, 2022
Hillert’s grain-boundary-phase (GBP) model is employed for predicting grain boundary (GB) chemistry in multicomponent alloys. The GB is approximated as a thin layer of a homogeneous phase with a constant thickness and its own Gibbs energy.
Masataka Funamoto   +3 more
doaj   +1 more source

A Three-Dimensional Infinite Collapse Map with Image Encryption

open access: yesEntropy, 2021
Chaos is considered as a natural candidate for encryption systems owing to its sensitivity to initial values and unpredictability of its orbit. However, some encryption schemes based on low-dimensional chaotic systems exhibit various security defects due
Wenhao Yan   +3 more
doaj   +1 more source

Thermodynamics of three-dimensional Kitaev quantum spin liquids via tensor networks

open access: yesPhysical Review Research, 2021
We study the 3D Kitaev and Kitaev-Heisenberg models, respectively, on the hyperhoneycomb and hyperoctagon lattices, both at zero and finite-temperature, in the thermodynamic limit.
Saeed S. Jahromi   +2 more
doaj   +1 more source

Solid-phase equilibria in the GeBi2Te4-Bi2Te3-Te system and thermodynamic properties of compounds of the GeTe·mBi2Te3 homologous series

open access: yesФізика і хімія твердого тіла, 2022
The GeBi2Te4-Bi2Te3-Te system was investigated by XRD and EMF measurements of the reversible concentration cell of the type (-) GeTe (solid) │glycerol +KCl │ Ge-Bi-Тe (solid) (+) in the 300-450K temperature range. It was shown that, in the indicated
T.M. Alakbarova   +4 more
doaj   +1 more source

DFT-CEF Approach for the Thermodynamic Properties and Volume of Stable and Metastable Al–Ni Compounds

open access: yesMetals, 2020
The Al–Ni system has been intensively studied both experimentally and theoretically. Previous first-principles calculations based on density-functional theory (DFT) typically investigate the stable phases of this system in their experimental ...
Silvana Tumminello   +6 more
doaj   +1 more source

First-principles calculations of carbon clathrates: comparison to silicon and germanium clathrates [PDF]

open access: yes, 2010
We employ state-of-the-art first-principles calculations based on density-functional theory and density-functional perturbation theory to investigate relevant physical properties and phase diagram of the free guest type-I (X-46) and type-II (X-34) carbon
Connétable, Damien
core   +4 more sources

Teleonomic Entropy: Measuring the Phase-Space of End-Directed Systems [PDF]

open access: yes, 2004
We introduce a novel way of measuring the entropy of a set of values undergoing changes. Such a measure becomes useful when analyzing the temporal development of an algorithm designed to numerically update a collection of values such as artificial neural
Alexander Pudmenzky   +6 more
core   +2 more sources

Emergence of superconductivity, valence bond order and Mott insulators in Pd[(dmit)2] based organic salts

open access: yes, 2010
The $\EtMeP$ and $\EtMeSb$ nearly triangular organic salts are distinguished from most other Pd[(dmit)$_2$] based salts, as they display valence bond and no long range order, respectively.
Kee, Hae-Young, Rau, Jeffrey G.
core   +1 more source

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