, , , .
.
, -, () -. . . n .
. .
, E+dE dn=Nn(E)*2fM-dE, (2.2.1)
Nn(E) - , ; fM- - -,
fM- , .
2 .
(2.2.1) . (2.2.2)
n, , (2.2.2) .(2.2.3)
(2.2.3) .(2.2.4)
, .(2.2.5)
(2.2.4) (2.2.5) mn mp .
(2.2.4) (2.2.5) , EF, , .
n : .(2.2.6)
, . (2.2.6) .
.
, NA=ND=0, NA ND - , . ni pi.i=p (2.3.1) i . (2.2.4) (2.2.5)
|
|
, , . (2.3.2)
. =0: ,(2.3.3)
Eg - . .. =0 .
, mp>mn mp<mn (. 2.4). , , , .
EF (2.3.3) (2.2.4) (2.2.5), . (2.3.4)
(2.3.4) , Eg. ni T Eg .
(2.3.4) : . (2.3.5)
(2.3.5) (2.2.6) , ,
. (2.3.6)
. (2.3.6) , , . (2.3.6)
. (2.3.7)