Results 241 to 250 of about 35,127 (280)

Investigation on the Intrinsic Phonon Properties of CrPS₄: A Combined Raman Spectroscopy and First-Principles Calculations Study. [PDF]

ACS Omega
Li M, Wei X, Xie Q, Chen L, Ma L, Cheng G.   +5 more
europepmc   +1 more source

Excellent thermoelectric performance of Bi₂MO₄Cl (M = Y, La, and Bi) derived from ultra-low lattice thermal conductivity.

J Mater Chem A Mater
Bi S, Savory CN, Squires AG, Han D, Spooner KB, Scanlon DO.   +5 more
europepmc   +1 more source

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Anharmonic Resonance

American Journal of Physics, 1953
The oscillations of a pair of classical oscillators which are synchronized because of anharmonic resonance can be calculated by the method of variation of constants. Two types of motion are studied: librational and nonlibrational—referring to oscillatory and progressive behavior, respectively, of the phase difference of the two oscillators.
Jehle, Herbert, Cahn, Julius H.
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Anharmonic problem without the anharmonic potential

Journal of Structural Chemistry, 2010
Anharmonic effects are shown to be obtained immediately in the statement of a quantum problem as a general electronic vibrational problem in the matrix formulation and without the use of a traditional anharmonic potential. The methods to form the matrix and to calculate all matrix elements are presented.
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Anharmonic solids. Thermal conductivity

Bulletin de la Classe des sciences, 1960
Using a method developed by Prigogine and Henin the thermal conductivity of an anharmonic crystal is obtained to the order λ2. The calculation is performed using the « brownian motion assumption » wich enables us to get results solving relatively simple equations — a correction due to dilatation effects is also included.
Hénin, Françoise, Blum, L.
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Anharmonic Grassmann oscillator. II

Physical Review D, 1990
An analysis of the anharmonic fermion oscillator, possessing an $\mathrm{Sp}(2)\ifmmode\times\else\texttimes\fi{}\mathrm{O}(N)$ symmetry, is presented. The complete solution is given for $N=2 \mathrm{and} 3$, and the general features for arbitrary $N$ are spelled out.
, Delbourgo, , Jones, , White
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Anharmonicity of Amide Modes

The Journal of Physical Chemistry B, 2005
The principal contributions to the anharmonic coupling of amide vibrations are explored with the objective of comparing recent experiments with density functional theory and evaluating simple models of mode coupling. Experimental information obtained by means of two-dimensional infrared spectroscopy (2D IR) is reasonably well predicted by the computed ...
Jianping, Wang, Robin M, Hochstrasser
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Anharmonic model for polyyne

Physical Review B, 1990
Calculs sur des chaines de carbone a l'aide de methodes concernant les polymeres helicoidaux. Les resultats sont utilises pour fournir des parametres aux hamiltoniens du modele lie au modele bien connu de Su-Schrieffer-Heeger concernant les polymeres conjugues a liaisons sp ...
, Springborg, , Drechsler, , Málek
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Anharmonic interactions

2003
Abstract The basic harmonic model theory of lattice dynamics developed in Chapters 8 and 9 has proven to be extremely powerful. It has enabled an understanding of a wide range of basic phenomena, such as the propogation of sound waves, thermodynamic properties, and interaction of radiation such as light, X-rays, and neutron beams with ...
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Anharmonic oscillator

Integrare prin cercetare și inovare. Științe exacte și ale naturii
The article analyzes the influence of the non-linear terms of the restoring force at large deviations from the equilibrium position of an oscillating body (non-linear oscillator). Particularly, it is demonstrated, in an accessible way,that the oscillations of the anharmonic oscillator drastically differ from thoseof a harmonic one. The main reason lies
Sergiu Carlig, Profirie Bardetchi, Viorel Ciornea, Mihai Macovei   +3 more
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