How is the k (horizontal location for green dots) calculated?

Closed | Responses: 0

I looked through the MATLAB code at https://nanohub.org/resources/9203 and it does not produce anything like the green dots plot. How is the k (which I take as the Bloch parameter) computed from the …

http://nanohub.org/answers/question/986

Is it working for triangular barrier?

Closed | Responses: 0

I tried to use 5 barriers simulations to simulate a single triangular barrier transmission. I set different barrier height for each barrier, and set the inter-barrier region witdh to be 0. Why did I …

http://nanohub.org/answers/question/844

what does the tool improvement of version 1.1.9 really mean?

Open | Responses: 1

1.1.9 - A problem pertaining to the geometry adjustment when a tight-binding calculation is called, has been corrected. i think a bit more description is really needed. Is the barrier …

http://nanohub.org/answers/question/260

the lattice constant for tight binding should be really used in the generation of the heterostructure

Open | Responses: 2

Right now the lattice constant is set to the GaAs lattice constant of 0.56. That means that the barriers should be automatically set to equal multiples of that lattice constant - one cannot have a …

http://nanohub.org/answers/question/257

Effective mass variation in pcpbt is not working correctly for tight binding

Open | Responses: 2

For a double barrier structure doubling the barrier height or doubling the effective mass should roughly have the same effect (for low lying energy states, say when the barrier is already high and …

http://nanohub.org/answers/question/256

the tight binding calculations do not yet allow for a change in effective masses

Open | Responses: 3

It would be great if the tool would also allow for changing effective masses along the device. Barrier materials have typically different effective masses from well materials. It would also be …

http://nanohub.org/answers/question/222

single barrier choice results in no output

Open | Responses: 1

I thought this had gotten fixed in the code, but again the tool does not create any outputs when a single barrier is chosen

http://nanohub.org/answers/question/170

compare a tight binding calculation to the analytical expansion methodin this tool

Open | Responses: 2

The tool solves the analytical expansions through transfer matrices to compute transmission coefficients. The RTD tool for example solves the similar problem in a single effective mass approach. It …

http://nanohub.org/answers/question/164

for 100 barriers the resonance finder has some problems

Open | Responses: 1

It appears that the resonance finder works quite well, but I have a feeling that the resonances themselves are not counted properly. For example at 100 barriers one can see that the second band …

http://nanohub.org/answers/question/163

Feedback about the progress in the resonance finding would be great -

Open | Responses: 1

If the resonance refinement happens in various stages it would be good to report these stages as a progress meter in the calculation

http://nanohub.org/answers/question/162

transmission and reflection coefficients on exchanged axes

Open | Responses: 1

It would be convenient for educational purposes if the transmisison and reflection coefficients could also be plotted on interchanged axes where enegy is on the vertical axis , just like the band …

http://nanohub.org/answers/question/153

the tool does not create transmission coefficients for a single barrier case

Open | Responses: 1

neither the band-edge diagram nor the transmission coefficient are shown. It seems like this tool should be able to handle a single barrier. Maybe there is a simple coding problem

http://nanohub.org/answers/question/152