Marolop Simanullang @ on
Confusing simulation results
Dear Sir/ Madam
This is Marolop again. I hope you will not get bored of answering my questions (_). I’m simulating germanium-based nanowire using band structure lab. I modulate the nanowire diameter (10 nm, 9 nm, 8 nm, 7 nm, and 6 nm). I want to observe the relation between band gap and diameter of germanium nanowire. Here are the simulation results that I obtained. * For diameter of 10 nm, conduction band minima = 1.50783 eV, valence band maxima = 0.71326 eV, and bandgap = 0.794572 eV. * For diameter of 9 nm, valence band minima = 0.70368 eV (there are no conduction band and band gap). * For diameter of 8 nm, conduction band minima = 1.5354 eV (there are no valence band and band gap). * For diameter of 7 nm, there’s no result at all. * For diameter of 6 nm, valence band minima = 0.64177 eV (there are no conduction band and band gap).
Another confusing part is about the valence band minima. We will be able to calculate band gap if we know the value of conduction band minima and valence band maxima. But simulation result for diameter of 9 nm and 6 gave values of valence band minima.
Anybody can help me to understand this simulation result? They are really confusing. I can’t plot the result in a graph. Thanks.