
#1
Feb1313, 04:14 PM

P: 241

As far as I know, Bragg diffraction happens for incident particles which are free; for example free electrons or Xray are Braggreflected under the special conditions. Why the Bragg diffraction happens for electrons which are not free in a crystal?




#2
Feb1313, 04:35 PM

P: 67

Waves can be of any nature and spread in any medium. Electron wave in ion's lattice is a WAVE with ions as diffracting screen. 



#3
Feb1313, 05:03 PM

P: 241

If we consider the diffraction classically, incident waves are in direction of [itex]k[/itex] and reflected waves are in direction of [itex]k^\prime[/itex] and [itex]G=kk^\prime[/itex]. But for electrons in crystals direction of motion is not direction of wave vector.




#4
Feb1313, 05:28 PM

P: 67

Bragg reflection at the BZ 


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