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Electron Band Structure in Germanium, My Ass (2001)

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Re: Electron Band Structure in Germanium, My Ass (2001)

#3
Why the experimental points don't have error bars?

Is it not possible to use four terminal sensing? https://en.wikipedia.org/wiki/Four-terminal_sensing Perhaps the sample is too irregular, but for very low resistance samples using only two terminals never work.

Can they use a lock-in amplifier? https://en.wikipedia.org/wiki/Lock-in_amplifier When it works, it's like magic. I'm not sure that it is useful here

> I attached them as appropriate to the second-rate equipment I scavenged from the back of the lab, none of which worked properly.

Yep, that's usual.

In next life, remember to be a mathematician.

Re: Electron Band Structure in Germanium, My Ass (2001)

#4
I think this is a good deal older than 2007, but my memory could be playing tricks on me. I could swear I had read this when I was studying semiconductors in school, in the early 2000s.

Edit: could be I'm thinking of Britney Spears' Guide to Semiconductor Physics, and I read this article later.

Re: Electron Band Structure in Germanium, My Ass (2001)

#6
post #4

I think this is a good deal older than 2007, but my memory could be playing tricks on me. I could swear I had read this when I was studying semiconductors in school, in the early 2000s. Edit: could be I'm thinking of Britney Spears' Guide to Semiconductor Physics, and I read this article later.

Considering he graduated from Stanford in '99 I would say so.

Re: Electron Band Structure in Germanium, My Ass (2001)

#8
post #5

" ...by waving your hands and chanting "to first order". " I've found that to be very successful in all walks of life.

Another classic in the same vein as the linked article is http://people.cs.uchicago.edu/~dinoj/scilies.html, which contains this nugget:

"Correct to within an order of magnitude."

Wrong.

Re: Electron Band Structure in Germanium, My Ass (2001)

#9
Virtually everything, and I mean everything in your post was wrong, but I still enjoyed the hell out of it.

Laser scientists know that if you use (a well anti-reflection coated) Ge window or lens to transmit a high power CO2 laser beam, slight absorption heats it a little. Heating it a little makes it more absorptive. So it heats a little more. And so forth, until the motherf——r cracks: “thermal runaway.”

Guess why? You are going to be a good experimental physicist eventually. Eventually. I spent two years blowing up homemade nitrogen lasers at Berkeley. Keep posting!

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