Band Calculation of Si (diamond)
| InAs | GaN | Si | GaAs | GaSb |
 |
Isosurfaces
 |
 |
 |
 |
| (Top left) Isosurfaces (E = 1.0eV)of theSi crystal calculated by an ab InitioBandcalculation developed in my group.(Top Rightand Bottoms) One of them(enlarged)whichmay be approximated by a rotary ellipsoid. | |
 |
|
| A contour plot | |
Approximated by a tight-binding approximation
 |
 |
| The 6 equipotential rotary ellipsoidsinthe CB approximated by the extractedNN TBparameters. Note these shapes are not rotary ellipsoids,but have cylindrical symmetry. |
|
contour plot
 |
 |
