e-ph coupling / IETS spectra...

[Dipankar Saha]

Hi,
I wanted to know that_
1) Do you only consider the channel region.....while calculating e-ph coupling.....?!!
If so.....then I have a very odd question.../ Can I change the direction of transport...say top to bottom....? More precisely.....even if I swap the axes...to make things  such that the transport direction is always "Z"...but, can there be any discontinuity inside (just as much as the inter layer distance) the channel region??
2) Besides, is there any plugin or, script for finding the plot of ...."[ (d²I/dV² ) /(dI/dV)]   v/s.  bias voltage", considering the diff. kinds of vibrations..... ??

Best_
Dipankar

[kstokbro]

please detail question 1, I do not understand it.

Regarding 2, there is a plugin to plot dI/dV vs V and d2I/d2V vs V. You can download the data and combine them to plot what you suggest.

[Dipankar Saha]

Regarding question (1) _
What I was actually looking for....can somewhat be described by the cartoon drawn in the attached file....
Will there be any transport in z-direction...?

Thanks & Regards_
Dipankar

[Anders Blom]

Of course - in any device in ATK, the central region can be anything - incl. defects, extra layers, and so on. But I'm also not sure I understand the exact question, because this cartoon is exactly a "normal" device for me, so why wouldn't there be transport? That is, I don't understand why it's not a normal device. Of course if the vacuum gap (?) is very wide, transport is suppressed but as long as there is a basis set overlap between atoms in materials A and B, the electrons can tunnel across the gap.

[Dipankar Saha]

Actually I was thinking of a top contact and the bulk material beneath that.... /So, out-of-the plane transport can be found..as you mentioned (of course, I have to change the axes to make the "z"  as the transport direction... ) ....right??

[Anders Blom]

There is no way to deal with "bending currents", the current must always propagate in one, independent direction.

[Dipankar Saha]

Dr. Anders Blom,

Okay... I  see .... / Thank you very much for the reply...

Regards_
Dipankar