| Title |
|
|
|
A representation of the energy gap in diamond-structure semiconductors
|
|
| Author |
|
|
|
|
|
| Abstract |
|
|
|
| It is shown that the experimental energy gap E-g , in the four semi-conductors C, Si, Ge and alpha-Sn with the diamond lattice structure is well represented by the relation E-g = A(a(c)(1/2) - a(1/2))(5/3), where a is the lattice parameter and a(c) the 'critical' lattice parameter corresponding to E-g = 0. It is suggested that (a(c)(1/2) - a(1/2)) is an order parameter of the transition from zero to non-zero band gap. It is also shown that the dielectric constant can be related to this order parameter. The band gap relation is also found to hold for the III-V semiconductors once the contribution to the band gap from their electronegativity has been subtracted. | |
|
| Language |
|
|
|
English
|
|
| Source (journal) |
|
|
|
Philosophical magazine letters. - London |
|
| Publication |
|
|
|
London : 2004
|
|
| ISSN |
|
|
|
0950-0839 [print]
1362-3036 [online]
|
|
| Volume/pages |
|
|
|
84:5(2004), p. 335-340
|
|
| ISI |
|
|
|
000222178500006
|
|
| Full text (Publisher's DOI) |
|
|
| |
|