Melting as an Instability of Crystal Structure with respect to Transverse Acoustic Wave, Quasi-Harmonic Approach

• Authors: A. Czachor
• Languages of publication: EN

Abstracts

EN

It is suggested that the precursor of melting in some crystals can be a macroscopic shear deformation such as the transverse sound wave. This hypothesis is examined basing on the quasi-harmonic approach to lattice dynamics within the two-body ion-ion concept of interaction in metals. One finds that due to the temperature induced modification of effective ion-ion interaction appearing in the quasi-harmonic approximation the crystal ceases to support propagation of transverse sound waves when its temperature approaches a certain critical temperature T_{cr}, understood here to be the melting temperature T_{m}.

Keywords

EN

64.70.dj

Discipline

• 64.70.dj: Melting of specific substances

• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 122
• Issue: 2
• Pages: 365-369

Dates

published

2012-08

Contributors

author

A. Czachor

• National Center for Nuclear Research, Świerk, 05-400 Otwock, Poland

References

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Identifiers

DOI

10.12693/APhysPolA.122.365