Electron tempertaure from analyser

[dhurba]

1> Can we find the variation of the I-V curve with respect to the electron temperature from the Analyzer (ie changing the temp in the analyzer )
 

2> and also is there any difference between electron temp and electrode temp ?

[dhurba]

I am asking this question because a I-V curve generated with 100K using scripter is not in accordance with the curve when i change the temperature from 300K to 100K in the analyzer of a .nc file generated with 300K .

[Anders Blom]

Yes, there is a difference.

When you set the temperature in the electrodes, before the calculation, this influences the self-consistent calculation and changes the electron distribution in the central region indirectly, since there are now different boundary conditions at the interfaces to the electrodes (because of the excited electron distribution in the leads).

If you only change it in the analysis of the transmission, then you use the same electron distribution for the central region, but change the distribution in the leads for each calculation of the transmission spectrum.

[dhurba]

In 11.8 can we study the current (I-V) at different temperatures of a metal/CNT/metal  device by changing the temp in the scripter.

Is that temperature in the scripter same as the real physical temperature 

[Anders Blom]

No, it is not. There is no thermalization of the electrons with a phonon bath or anything like that. What you can say, however, is that ATK can describe a hot electron (Fermi-like) distribution, and you can study the effect of this on the transport properties.

[dhurba]

using the following parameters we got two different curves at 300K and 100K
tolerance=1e-05
history steps =20

the curve exhibits NDR at 300K but not at 100K ..which will be most relevant result  .