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Isn't this just EPR w/ X-Ray photons? I say "just", but maybe EPR w/ X-Ray photons is really hard. I can't say this is my area of experimental expertise.
by retrocryptid 3y ago
Isn't this just EPR w/ X-Ray photons?
I say "just", but maybe EPR w/ X-Ray photons is really hard. I can't say this is my area of experimental expertise.
- el_oni 3y agoMy quick skim looks like its more like XPS or XAFS or XANES. Mixed with AFM
- rsfern 3y agoAgreed, my read of the abstract is that they’re doing near edge x-ray absorption spectroscopy (so XANES) and they make it a single atom technique by tunneling the signal into an STM tip
- jpmattia 3y ago> Isn't this just EPR w/ X-Ray photons? From a quick read: I don't think so. There's no magnetic field, and the collected electron can be from a pair (ie both spins in one orbital) I think it is better described as exotic STM: In normal STM, you put a bias on the tip relative to the material, and then put the tip close enough to the material so that a valence (or free) electron tunnels across the vacuum. In this work, it appears they put the tip close to the atom and then whack one of the inner electrons with an x-ray photon, which is then collected by the tip. [I don't understand how they engineer the fields so that the scattered electron is collected by the tip, but I'm assuming the atom to be measured is somehow connected electrically to create a bias between the sample and tip. If anyone has access to the paper, don't keep it a secret.] Corrections welcome, I'm curious myself how this works.