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Neelanjan Bhattacharya

Follow up to material change quantum dot lab

Dear Dr Klimeck Thank you very much for your feedback. We want to simulate a different material from GaAs such as CdSe/CdTe/ ZnS using NEMO3D. We accessed your website and read your papers on alloyed quantum dots, but where do we find NEMO3D software? In “quantum dot lab”, there is no entry where the parameters of GaAs are visible so that we can overwrite it for other materials? We need it for a Masters thesis, the student graduates by July end, hence an early response will be very beneficial to us. Thanks once again Neel

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    Gerhard Klimeck

    The tool has now been updated to allow users to enter an effective mass for the quantum dot. Xufeng Wang also added a progress bar to the graphical user interface.

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    Gerhard Klimeck

    We did some improvements to the quantum dot lab and just tested it in the last 24 hours. The updated version should be released by Monday night.

    Now users can select an effective mass of the quantum dot. Also the tool speed was a bit improved and there is a status bar indicating progress in the visualization preparation – which had been slow.

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    Gerhard Klimeck

    NEMO3D can in principle handle CdSe for sure. I had a student work on this briefly to enable this. We had planned to release this capability with an improved quantum dot lab by the end of summer.

    If you are interested in optical transitions between the conduction and the valence band, then the existing single band quantum dot lab would not help you, unless you do 2 independent effective masses for holes and electrons and take the difference energies. That is extremely crude. What is missing for this is the ability to enter a single effective mass, rather than a material property. This could be done in principle rapidly.

    NEMO3D is unfortunately no longer properly distributed on the openchannelsoftware web site. It is open source. I am willing to discuss this in more detail by private email

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