scholarly journals Configurational lattice dynamics: The phase diagram ofRh−Pd

2005 ◽  
Vol 71 (14) ◽  
Author(s):  
C. Cienfuegos ◽  
E. P. Isoardi ◽  
G. D. Barrera
Keyword(s):  
Phase Diagram ◽  
Lattice Dynamics

Lattice Dynamics, Dielectric Constants, and Phase Diagram of Bismuth Layered Ferroelectric Bi3 Ti1−x W x NbO9+δ Ceramics

2016 ◽  
Vol 99 (11) ◽  
pp. 3610-3615 ◽  
Author(s):  
Jinzhong Zhang ◽  
Kai Jiang ◽  
Zhiyong Zhou ◽  
Zhigao Hu ◽  
Genshui Wang ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Lattice Dynamics ◽  
Dielectric Constants

Lattice dynamics and phase diagram of aluminum at high temperatures

2013 ◽  
Vol 117 (4) ◽  
pp. 664-671 ◽  
Author(s):  
Yu. B. Kudasov ◽  
O. M. Surdin ◽  
A. S. Korshunov ◽  
V. N. Pavlov ◽  
N. V. Frolova ◽  
...  
Keyword(s):  
Phase Diagram ◽  
High Temperatures ◽  
Lattice Dynamics

scholarly journals Evolution of Charge-Lattice Dynamics across the Kuramoto Synchronization Phase Diagram of Quantum Tunneling Polarons in Cuprate Superconductors

2021 ◽  
Vol 6 (4) ◽  
pp. 52
Author(s):  
Victor Velasco ◽  
Marcello B. Silva Neto ◽  
Andrea Perali ◽  
Sandro Wimberger ◽  
Alan R. Bishop ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Quantum Tunneling ◽  
Lattice Dynamics ◽  
Cuprate Superconductors ◽  
High Temperature Superconductivity ◽  
Phase Locking ◽  
Dynamic Structure ◽  
Cuo2 Plane ◽  
Kuramoto Model ◽  
Site Distribution

Because of its sensitivity to the instantaneous structure factor, S(Q,t = 0), Extended X-ray Absorption Fine Structure (EXAFS) is a powerful tool for probing the dynamic structure of condensed matter systems in which the charge and lattice dynamics are coupled. When applied to hole-doped cuprate superconductors, EXAFS has revealed the presence of internal quantum tunneling polarons (IQTPs). An IQTP arises in EXAFS as a two-site distribution for certain Cu–O pairs, which is also duplicated in inelastic scattering but not observed in standard diffraction measurements. The Cu–Sr pair distribution has been found to be highly anharmonic and strongly correlated to both the IQTPs and to superconductivity, as, for example, in YSr2Cu2.75Mo0.25O7.54(Tc=84 K). In order to describe such nontrivial, anharmonic charge-lattice dynamics, we have proposed a model Hamiltonian for a prototype six-atom cluster, in which two Cu-apical-O IQTPs are charge-transfer bridged through Cu atoms by an O atom in the CuO2 plane and are anharmonically coupled via a Sr atom. By applying an exact diagonalization procedure to this cluster, we have verified that our model indeed produces an intricate interplay between charge and lattice dynamics. Then, by using the Kuramoto model for the synchronization of coupled quantum oscillators, we have found a first-order phase transition for the IQTPs into a synchronized, phase-locked phase. Most importantly, we have shown that this transition results specifically from the anharmonicity. Finally, we have provided a phase diagram showing the onset of the phase-locking of IQTPs as a function of the charge-lattice and anharmonic couplings in our model. We have found that the charge, initially confined to the apical oxygens, is partially pumped into the CuO2 plane in the synchronized phase, which suggests a possible connection between the synchronized dynamic structure and high-temperature superconductivity (HTSC) in doped cuprates.

Quasi harmonic lattice dynamics: the phase diagram of benzene

1996 ◽  
Vol 202 (2-3) ◽  
pp. 231-241 ◽  
Author(s):  
Raffaele Guido Della Valle ◽  
Elisabetta Venuti ◽  
Aldo Brillante
Keyword(s):  
Phase Diagram ◽  
Lattice Dynamics

Cooperative inter- and intra-layer lattice dynamics of photoexcited multi-walled carbon nanotubes studied by ultrafast electron diffraction

Nanoscale ◽  
2018 ◽  
Vol 10 (16) ◽  
pp. 7465-7471 ◽  
Author(s):  
Shuaishuai Sun ◽  
Zhongwen Li ◽  
Zi-An Li ◽  
Ruijuan Xiao ◽  
Ming Zhang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Phase Diagram ◽  
Electron Diffraction ◽  
Lattice Dynamics ◽  
Structural Evolution ◽  
Ultrafast Electron Diffraction ◽  
Temporal Phase ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Temporal phase diagram of reversible structural evolution of photoexcited MWCNTs showing cooperative inter- and intra-layer lattice dynamics.

Ab initiocalculation of the lattice dynamics and phase diagram of boron nitride

1999 ◽  
Vol 59 (13) ◽  
pp. 8551-8559 ◽  
Author(s):  
G. Kern ◽  
G. Kresse ◽  
J. Hafner
Keyword(s):  
Phase Diagram ◽  
Boron Nitride ◽  
Lattice Dynamics

New developments in the ab initio determination of transition metal alloys phase diagram

1993 ◽  
Vol 90 ◽  
pp. 249-254 ◽  
Author(s):  
C Wolverton ◽  
M Asta ◽  
S Ouannasser ◽  
H Dreyssé ◽  
D de Fontaine
Keyword(s):  
Phase Diagram ◽  
Transition Metal ◽  
Ab Initio ◽  
Metal Alloys ◽  
New Developments ◽  
Transition Metal Alloys
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