Register to reply

Isotropic crystal and energy band

by hokhani
Tags: band, crystal, energy, isotropic
Share this thread:
hokhani
#1
Nov9-13, 04:40 AM
P: 270
Since all the directions are equivalent in an isotropic crystal, can we deduce that the energy band is exactly spherical?
Phys.Org News Partner Physics news on Phys.org
A new, tunable device for spintronics
Researchers study gallium to design adjustable electronic components
Gadolinium-based material that can be cooled by varying magnetic field
DrDu
#2
Nov9-13, 09:21 AM
Sci Advisor
P: 3,593
The problem is that there are no isotropic crystals. Even cubic crystals are only symmetric with respect to four and threefold rotations about some special axes. However this is sufficient to render second order (but not higher order) tensors isotropic.
hokhani
#3
Nov11-13, 05:38 PM
P: 270
Quote Quote by DrDu View Post
The problem is that there are no isotropic crystals. Even cubic crystals are only symmetric with respect to four and threefold rotations about some special axes. However this is sufficient to render second order (but not higher order) tensors isotropic.
Do you mean that using the isotropic approximation we in fact disregard the crystal?

DrDu
#4
Nov12-13, 01:10 AM
Sci Advisor
P: 3,593
Isotropic crystal and energy band

Yes, indeed.


Register to reply

Related Discussions
How to determine band structure (E(k)) of a one dimensional crystal? Atomic, Solid State, Comp. Physics 3
Why the crystal momentum k in 2D band structure is defined on a torus? Atomic, Solid State, Comp. Physics 2
COMSOL band structure of photonic crystal waveguide Atomic, Solid State, Comp. Physics 6
Energy given off Photons/Heat from Conduction Band (Conduct Electron) to Valance band Atomic, Solid State, Comp. Physics 3
Valance band to Conduction Band (Valance Electron), Energy Band Gap Levels Advanced Physics Homework 0