View
12
Download
0
Category
Preview:
Citation preview
Chapter 7 #1
Chapter 7 #4
(b) The band gap at zone boundary plane normal to the end of reciprocal lattice
vector is 2 times the Fourier component . From part (a), we
know this quantity equals to 0 for first order approximation. So the band gap is zero to
the first order approximation.
xa
A ˆ2π
=
r
AU r
2
Chapter 7 #6
Additional problem
)cos(4a
bm
a
Aπ=
)cos(4a
bm
a
Aπ=
Recommended