The maximum voltage could be applied between two metal electrodes?

[postnikov]

In the current calculation mechanism, could someone tell me
the maximum voltage which could be applied between two metallic electrodes?
 3V 4V or 5V?

[Anders Blom]

Do you mean source/drain voltage, or gate voltage? Anyway, in principle none of them are limited, and ATK also contains special algorithms for handling large bias, so it should usually be possible to reach 5 V source drain bias, although convergence is always a bit tougher at high bias. For the gate voltages you can apply very high numbers, since it's the field, rather than the voltage itself, which matter.

[postnikov]

Do you mean source/drain voltage, or gate voltage? Anyway, in principle none of them are limited, and ATK also contains special algorithms for handling large bias, so it should usually be possible to reach 5 V source drain bias, although convergence is always a bit tougher at high bias. For the gate voltages you can apply very high numbers, since it's the field, rather than the voltage itself, which matter.

Thanks!

I mean the source-drain voltage.
As for atk 2008.10, the source-drain  bias could reach 5V?

[Anders Blom]

Ah, in that old version there was only single contour integration so no, it would be very hard to reach source-drain of 5 V there. The new double contour algorithm was implemented in the 2009 and later versions.