| I = e n
v |
| n
is electron density/length; v is mean velocity |
| In 1D n=k/2p, assuming
one electron per quantum state, so: |
| I = e
´ Dk/2 p ´ 2 p /h ´ (dE/dk) |
| =e2
DV ´ (dE/dk)-1 ´
(dE/dk)/h |
| I = DV
(e2/h) |
| I = V/ 25,813
W |
| Conductance of
the channel is quantized. |