How a cubic symmetric is isotropic ?
In the cubic symmetry there are three independent elastic constants, s_11, s_12 and s44. In a cubic crystal structure there are directions along which the material is softer and others along which is is stiffer. For instance, Silver, which has an fcc...
Does a sphere made of an elastically anisotropic material (eg. a material of cubic symmetry) subject to an hydrostatic pressure retains its spherical shape ?
Does anyone knows where I could find the answer to the problems in the classical book on x ray Diffraction by B. E. Warren "X-ray Diffraction" ?
It's not an easy-to-read book so I think that checking my solutions to the problems would be really helpful.
thanks
When we say that a phonon vibration mode has an average energy <E> are we saying that all atoms (or harmonic oscillators) in a piece of matter (eg. a nanoparticle) will also has that energy, or that the piece of matter as a whole will have that energy ?
In the second case the amplitude of the...