منابع مشابه
Pressure induced elastic softening in framework aluminosilicate- albite (NaAlSi3O8)
Albite (NaAlSi3O8) is an aluminosilicate mineral. Its crystal structure consists of 3-D framework of Al and Si tetrahedral units. We have used Density Functional Theory to investigate the high-pressure behavior of the crystal structure and how it affects the elasticity of albite. Our results indicate elastic softening between 6-8 GPa. This is observed in all the individual elastic stiffness com...
متن کاملEnhancement of superconducting transition temperature in MgB2 by strain-induced bond-stretching mode softening
A. V. Pogrebnyakov, 2, 3 J. M. Redwing, 3 S. Raghavan, 3 V. Vaithyanathan, 3 D. G. Schlom, 3 S. Y. Xu, 3 Qi Li, 3 D. A. Tenne, 3 A. Soukiassian, 3 X. X. Xi, 2, 3 M. D. Johannes, D. Kasinathan, W. E. Pickett, J. S. Wu, and J. C. H. Spence Department of Physics, The Pennsylvania State University, University Park, PA 16802 Department of Materials Science and Engineering, The Pennsylvania State Uni...
متن کاملSoftening of the radial breathing mode in metallic carbon nanotubes.
The softening of the radial breathing mode (RBM) of metallic single walled carbon nanotubes (m-SWNTs) due to electron-phonon coupling has been studied by observing the Fermi level [see text] dependence of the RBM Raman peak. In situ Raman spectra were obtained from several individual m-SWNTs while varying [see text] electrochemically. The RBM frequency of an intrinsic m-SWNT is shown to be down...
متن کاملEnhancement of the superconducting transition temperature of MgB2 by a strain-induced bond-stretching mode softening.
We report a systematic increase of the superconducting transition temperature T(c) with a biaxial tensile strain in MgB2 films to well beyond the bulk value. The tensile strain increases with the MgB2 film thickness, caused primarily by the coalescence of initially nucleated discrete islands (the Volmer-Weber growth mode.) The T(c) increase was observed in epitaxial films on SiC and sapphire su...
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ژورنال
عنوان ژورنال: THE REVIEW OF HIGH PRESSURE SCIENCE AND TECHNOLOGY
سال: 1998
ISSN: 0917-639X,1348-1940
DOI: 10.4131/jshpreview.7.718