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Messages - Ash

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1
Thanks Norland, for detailed and effective reply !!  :)

2
But without knowing the work function of this so called electrostatic region, how can one anticipate the changes of I-V as we move from two terminal to three terminal device with zero gate bias ?

3
Thanks Zh and Blom for your invaluable replies !!

4
Thanks Dr. Blom for the reply and helpful link !! :)

5
Are you certain at the point that device DOS is just for scattering or center region and not for the device I tried to find this in the reference that you gave me (http://quantumwise.com/documents/manuals/latest/ReferenceManual/XHTML/ref.devicedensityofstates.html). However, I could not find it anywhere mentioned. If it is the case, that would be answer to my other question that I posted on the forum (http://quantumwise.com/forum/index.php?topic=1645.msg8137;topicseen#msg8137).
Also, why the application of either the gate or electrodes voltage changes the amplitude of DDOS peaks. I thought it just shifts the DOS peaks in energy?

6
Or please suggest me alternative ways to explain the I-V characteristics at different gate biases. I would highly appreciate your replies and suggestions !!  ;)

7
Thanks Zh !! for your detailed and helpful reply  :)

8
I would really appreciate your answers and suggestions.  :)

9
Hi everyone,
Can anyone tell me the interpretation of the DDOS, is the result of the DOS alignment between electrodes and central region at different biases or just the DOS of the entire device. Why does it vary with respect to the gate or electrodes biases?
Can it DDOS be used for the explanation of the I-V characteristics other than Transmission spectrum?

10
Hello everyone,
Please help me find out the DOS and band diagram variation corresponding to the scattering region of any MOSFET like device at different gate biases?

11
Hi everyone,
Can someone help me explain the variation of band gap value (Eg), its location with respect to Fermi level, the curvature of valence band minimum and conduction band maximum  and number of valence (conduction) bands below (above) the Fermi level as the bulk grows from smallest unit cell to the unit cell containing more number of smallest unit cells ?

12
Thanks !! That's what I was about to ask next  :D

13
Hi everyone,

Can someone please explain me the interpretation of 'Total Energy' ? Is it the total energy per Unit Cell or per atom or per whole bulk repeated infinitely as unit cell does ?

14
Thanks Norland, for providing me these many resources. However I was looking at the Manual: http://www.quantumwise.com/documents/manuals/latest/ReferenceManual/index.html/ref.transmissionspectrum.html but I could only find out about the calculation of current and conductance but nothing is mentioned (No formula is given) about the calculation of Transmission Spectrum itself.

15
Hi everyone,
I want to know the physics behind the calculation of Transmission Spectrum from DFT. Please give me the details or suggest me some reference paper for the same.

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