- #1
NaOH
- 31
- 0
I am struggling in understanding what the band structure (E vs. k) diagram tells me.
Let's say I have the following material:
http://www2.warwick.ac.uk/fac/sci/physics/current/postgraduate/regs/mpags/ex5/phonons/indirect_absorption/indirect_absorption.bmp
http://www2.warwick.ac.uk/fac/sci/physics/current/postgraduate/regs/mpags/ex5/phonons/indirect_absorption/indirect_absorption.bmp
Let the direct band gap be denoted as ωg. Let's say the temperature is such that it is possible for energies up to ħ(ω+Ω). But since ε(ħ(ω+Ω))<ε(ωg), can I say that I will only observe appreciable current when I apply a electric field in the direction of +kr?
Let's say I have the following material:
http://www2.warwick.ac.uk/fac/sci/physics/current/postgraduate/regs/mpags/ex5/phonons/indirect_absorption/indirect_absorption.bmp
http://www2.warwick.ac.uk/fac/sci/physics/current/postgraduate/regs/mpags/ex5/phonons/indirect_absorption/indirect_absorption.bmp
Let the direct band gap be denoted as ωg. Let's say the temperature is such that it is possible for energies up to ħ(ω+Ω). But since ε(ħ(ω+Ω))<ε(ωg), can I say that I will only observe appreciable current when I apply a electric field in the direction of +kr?