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John Tommas

medici plot Ec vs X

Someone please help. I need help with medici to do a 1D plot on Ec(eV) vs X(nm). If anyone know the command please reply. Thank you in advance.

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    Chen Zhixian

    You can use PLOT.1D. The command is:

    PLOT.1D CONDUC.B X.START=0 X.END=1 Y.START=0 Y.END=0

    which will plot Ec along the line from (0 um, 0 um) to (1 um, 0 um). You can also plot valence band (VALENC.B) or fermi potentials (QFN or QFP). The usual PLOT.1D parameters can be used, like TITLE, COLOR, TOP, BOTTOM, etc. You can then add in labels using LABEL.

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      John Tommas

      hi Chen Zhixian, thanks for your reply. Actually I had tried to use the commands that you had posted to plot a band diagram but they look weird to me. I am doing a medici simulation for metal source drain double gate mosfet to see how does the band structure and drain current will change when i varies the channel doping concentration, gate oxide thickness, etc. Please take a look at this web and please tell me whether to do a A cut or B cut to be able to see how the doping and oxide thickness variation will affect the bending. http://www.geocities.com/johntommas@rocketmail.com/dg.JPG


      also can anyone tell me if my gate is at 4.65ev (around mid gap) while my drain and source is at 4.05eV, why will my Id-Vd curve shows that when doping(channel is p type doping) increases, Id actually decreases? the image is shown in http://www.geocities.com/johntommas@rocketmail.com/405.JPG


      I am also confused why when the gate is at 4.65eV, source and drain at 5.15ev (valence band edge), i plotting a id-vd using medici and the drain current curve appears to be increasing exponentially unlike the normal id-vd curve where id will first increase then saturates. the image is shown in http://www.geocities.com/johntommas@rocketmail.com/515.JPG


      thank you everyone for reading, please assist if possible. thank you very much

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