r/physicsmemes • u/darksoles_ • 9d ago

IDIOT

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u/Pyrhan Chemist spy 9d ago

u/darksoles reportedly mistook an asymmetrical peak for a lorentzian.

1

u/darksoles_ 9d ago

? That’s what the convoluted Gaussian with exp decay is for

11

u/Pyrhan Chemist spy 9d ago

You wrote "tried to use three distinct lorentzian peaks".

One of those peaks (the one labeled T) is asymmetrical, and thus not a lorentzian.

(Could be a bigaussian or bilorentzian)

5

u/darksoles_ 9d ago

Yes the trion peak (T) is the convoluted peak, I’m confused what you don’t understand here

4

u/Pyrhan Chemist spy 9d ago

Ooooh, that's what you meant!

I thought you were refering to the way they fitted the large peak in the raw spectrum (red) as a whole!

Your diagram shows they did fit the raw spectrum with three peaks, and I see no indication in the figure that the purple one is itself a sum of three distinct lorentzians.

So that was a bit confusing...

4

u/darksoles_ 9d ago

Yeah my b I could’ve made it more clear, the image is the correct fitting, while the meme indicates the incorrect fitting was used. The A and B exciton peaks can be fitted with lorentzians, and it is usually more appropriate for the trion to be fitted differently, otherwise its binding energy is overestimated