Abstract
We have developed a 'linear combination of bulk bands' method that permits atomistic, pseudopotential electronic structure calculations for .apprx.10(sup6) atom nanostructures. Application to (GaAs)n/A1As)n (001) superlattices (SL's) reveals even-odd oscillations in the ..Gamma..-X coupling magnitude Vrx(n), which vanishes for n = odd, even for abrupt and segregated SL's, respectively.Surprisingly, in contrast with recent expectations, OD quantum dots are found here to have a smaller ..Gamma..-X coupling than equivalent 2D SL's. Our analysis shows that for large quantum dots this is largely due to the existence of level repulsion from many X states.
Original language | American English |
---|---|
Pages (from-to) | 2819-2822 |
Number of pages | 4 |
Journal | Physical Review Letters |
Volume | 78 |
Issue number | 14 |
DOIs | |
State | Published - 1997 |
NREL Publication Number
- NREL/JA-450-23341