I believe that for each X/Y grid point, the tip is moved through a series
of Z position heights. At each height a measurement is made (e.g. current).
I think what Jose wants is the following. For each X/Y grid point, find
the Z height corresponding to a certain current (or first Z height for
which current is above/below a threshold). Now you have a "normal" dataset
with a certain Z height for each X/Y point and can display as desired.
On Fri, May 9, 2014 at 1:58 PM, David Nečas (Yeti) <[email protected]>wrote:
> On Fri, May 09, 2014 at 08:27:53PM +0000, José Coutinho wrote:
> > Not sure if you understood it right. I meant the maximum z-coordinate
> > that corresponds to a user-defined (constant) LDOS(E+dE,x,y,z).
> > Basically, in STM the tip hoovers over a landscape with approximately
> > constant LDOS.
>
> I admit that, being the kind of physicist preferring pencil and paper to
> fickle real-world samples, I have only some basic understanding of STM.
> Anyway, for me the full STM description would have 4 abscissa axes (the
> fourth being voltage, electron energy, or something similar), whether we
> talk about current, density of states, or anything. So please dumb it
> down for me by saying explicitly what are the axes for the N1×N2×N3 grid
> and what is the value (ordinate) because I am still missing one axis
> somewhere.
>
> Thanks,
>
> Yeti
>
>
>
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