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3 32 2
1 1 1 1
1-3 plane1-2 plane 1-2 plane 1-3 plane
p = 0 | p | >> m
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ct
a
ct
(ct ;-a,0,0)
0
x
0
0
1
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+mc
energy gap
E
A
B
2
-mc 2
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V(z)
z
E
V
I II III
2mc
V + mc
V + mc2 2
0
0
0
2
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V
V(z)
z
I II
+mc
-mc
0
2
2
(z) = + (z) = +I in refl I in out
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