Soft Phonon Mode and Elastic Instabilities in Stress-Induced Phase Transformation
نویسندگان
چکیده
منابع مشابه
Phonon and elastic instabilities in MoC and MoN
We present several results related to the instability of MoC and MoN in the B1 ~sodium chloride! structure. These compounds were proposed as potential superconductors with moderately high transition temperatures. We show that the elastic instability in B1-structure MoN, demonstrated several years ago, persists at elevated pressures, thus offering little hope of stabilizing this material without...
متن کاملPressure Induced Amorphization in Crystalline Silica: Soft Phonon Modes and Shear Instabilities in Coesite
Quartz and closely related materials will transform under pressure from crystalline states to amorphous forms. Here we examine coesite, a high pressure form of silica which also undergoes pressure induced amorphization. We nd that coesite, like quartz, possesses a shear instability closely coupled to a zone edge phonon softening at pressures comparable to the amorphization transformation. The c...
متن کاملElectric-Field-Controlled Surface Instabilities in Soft Elastic Films
Understanding morphological instabilities at soft interfaces is important in a variety of diverse problems, such as adhesion/debonding in polymer films and biological cells, friction, cavitation, and patterning. Non-specific interactions of electromagnetic origin play an important role in these instabilities. Spontaneous surface patterns appear in soft solid films that are in contact proximity ...
متن کاملGap formation and soft phonon mode in the Holstein model.
We investigate electron-phonon coupling in many-electron systems using the dynamical mean-field theory in combination with the numerical renormalization group. This nonperturbative method reveals significant precursor effects to the gap formation at intermediate coupling strengths. The emergence of a soft phonon mode and very strong lattice fluctuations can be understood in terms of Kondo-like ...
متن کاملContact instabilities of anisotropic and inhomogeneous soft elastic films.
Anisotropy plays important roles in various biological phenomena such as adhesion of geckos and grasshoppers enabled by the attachment pods having hierarchical structures like thin longitudinal setae connected with threads mimicked by anisotropic films. We study the contact instability of a transversely isotropic thin elastic film when it comes in contact proximity of another surface. In the pr...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of the Japan Institute of Metals and Materials
سال: 1997
ISSN: 0021-4876,1880-6880
DOI: 10.2320/jinstmet1952.61.8_696