Results 201 to 210 of about 69,527 (244)

Statistical Mechanics of Anharmonic Crystals

physica status solidi (b), 1984
AbstractA system of coupled anharmonic oscillators with fluctuations of the crystallographic lattice is considered. The anharmonicity is included as an effective field in the form of pseudoharmonic interactions. The description of the motion far from a Brownian particle embedded in the heat bath shows that the fluctuations lead to an explanation of the
B. Gaveau, J. Lawrynowicz, L. Wojtczak
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The statistical mechanics of imperfect molecular crystals

Solid State Communications, 1969
Abstract Equations are developed for the calculation of thermodynamic functions of imperfect molecular crystals containing one species of point defect on a cubic lattice, following a method proposed by Mayer[7]. The treatment of vibrations requires essentially only the techniques applicable to a perfect crystal, requires no static relaxation ...
A.R. Allnatt, L.A. Rowley
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Statistical Mechanics of a Crystal Surface

1994
The paper is an extension of our previous article (1984) on statistical mechanics of anharmonic crystals where we dealt with the pseudoharmonic approach in the case of infinite crystals. The extension consists in the formulation which enables us to describe the properties of the surface. We consider the adsorbed atoms which are randomly situated in the
Bernard Gaveau, Julian Ławrynowicz, Leszek Wojtczak   +2 more
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Statistical Mechanics of the Dislocation System in a Crystal

Journal of the Physical Society of Japan, 1988
The statistical mechanics of the assembly of the dislocation lines in a three dimensional crystal is developed. Using the transfer matrix method, the statistical mechanics of the dislocations is transformed into the ground state problem of the two dimensional Fermion-Boson system.
Takao Yamamoto, Takeo Izuyama
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Statistical Mechanics of Defect-Containing Solids. II. Ionic Crystals

The Journal of Chemical Physics, 1964
The cluster expansions for the partition function and defect distribution functions derived previously are studied in detail for the case of ionic crystals with the object of calculating activity coefficients, defect concentrations, and defect distribution functions at low defect concentrations.
A. R. Allnatt, Morrel H. Cohen
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Statistical Mechanical Theory of the Facet Edge of a Crystal

Journal of the Physical Society of Japan, 1987
The facet edge of the crystal is investigated theoretically on the basis of the Terrace-Step-Kink (TSK) model. The statistical mechanics of this model is formulated in terms of the lattice Fermion approach. The analysis leads always to the Pokrovsky-Talapov-Gruber-Mullins transition.
Takao Yamamoto, Takeo Izuyama
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Statistical mechanics of dissipative transport in crystals

Journal of Statistical Physics, 1997
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Statistical mechanics approach to the structure determination of a crystal

Acta Crystallographica Section A Foundations of Crystallography, 1985
The previously formulated new approach to the structure analysis of a crystal based on the profound analogy between the problem of determination of thermodynamic equilibrium in statistical mechanics and the optimization problem for a function of many variables [Khachaturyan, Semenovskaya & Vainshtein (1979). Soy. Phys. Crystallogr. 24, 519-524; (1981).
S. V. Semenovskaya, K. A. Khachaturyan, A. G. Khachaturyan   +2 more
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Statistical-Mechanical Study of Ultrasonic Waves in a Crystal Lattice

Japanese Journal of Applied Physics, 1993
Elastic waves with audio or ultrasonic frequencies propagating in a crystal lattice at a finite temperature are studied from the viewpoint of nonequilibrium statistical mechanics. In order to demonstrate the essential principle of the present approach, a simple system, that is, a one-dimensional anharmonic lattice is studied in detail.
Masaru Sugiyama, Hajime Kikkawa Hajime Kikkawa, Kouji Mizuno Kouji Mizuno   +2 more
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A statistical-mechanical model of polymer liquid crystals subjected to external deformations

The Journal of Chemical Physics, 2004
We consider the nematiclike system of polymer liquid crystal (PLC) macromolecules represented by the Flory semiflexible chain model. Segments of the flexible (F) spacers are shorter than the LC hard-rod sequences. We investigate effects of imposition of external deformations.
Witold, Brostow, Janusz, Walasek
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