Abstract
The effect of dimensional confinement on quantum levels is investigated for hydrogenated Ge [110] nanowires by “density-functional-theory pseudopotential” methods. The energy band dispersion is presented for wires up to in diameter. By placing a molecule in vacuum for reference the bands of the different sized wires are aligned and compared. It is found that for wires with diameters smaller than , confinement strongly affects the shape and energies of the conduction bands. It is found that the energy of the valence-band maximum does not change with diameter once a wire is greater than . The valence band maximum scales with diameter as , and the conduction band scales as .
- Received 23 May 2006
DOI:https://doi.org/10.1103/PhysRevB.74.165314
©2006 American Physical Society