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Electron band structure in germanium, my ass (2000)

pages.cs.wisc.edu

31–40 of 88 posts

Re: Electron band structure in germanium, my ass (2000)

#31

So what was the final grade - did whoever did the grading just look at the pictures? did he quit and go into CS, is he on HN? Did he make any other discoveries regarding the assiness of other fields of human endeavor as the years went by?

Stalking the LinkedIn, it seems he quit, switched to a PhD in CS and has been working at Google for the last 12 years.

Re: Electron band structure in germanium, my ass (2000)

#33

Exactly my experience back in the days doing the mandatory "advanced experimental physics laboratory semester" where you had to do like 14 vastly different experiment of the caliber described in that post in the course of one semester on old equipment that would break during the experiment, with less than motivated PhD students or post grads as teachers. Of the 14 experiments only two worked and we got the expected r…

> 14 vastly different experiment of the caliber described in that post in the course of one semester

My one remaining did-not-graduate nightmare is that I never completed that course. And I was an experimentalist.

> This experience drove me right into theoretical physics

Had a summer student work on my nearly-intractable dissertation experiment. He immediately switched to theory.

Re: Electron band structure in germanium, my ass (2000)

#34
post #4

You sure it isn’t Schottky diodes formed by the metallic contacts that are interfering with the measurement of the bulk germanium properties? I’d sputter deposit metallic contact regions and solder to those, then maybe compare two different thickness samples and look at the difference in resistivity vs. temperature, essentially de-embedding your fixture.

Came here to say this. You can’t solder leads on to semiconductors willy-nilly. The work functions are too different. So instead of an ohmic contact, you get a diode.

Re: Electron band structure in germanium, my ass (2000)

#35
post #9

Earlier quoted context omitted.

Yeah I don't quite understand how the physics curriculum is set. There is more and more physics discovered over time and yet the time you get to study remains the same. 4 years is not enough time to learn the math and physics you need to do anything real, not counting the other important stuff you need to do (like English comp and partying and getting your heart broken).

Heh this strikes me as funny. I remember studying hierarchical image classifiers... If you think physics changes fast you should check out CS sometime.

This strikes me as funny, because Lucas Kovar, the author, is now a software engineer at Google.

Re: Electron band structure in germanium, my ass (2000)

#36
What I'm taking away from the comment section is that if you have trouble replicating an experiment, you should take advantage of Cunningham's law: instead of having your pleads for help ignored by some highly demotivated PhD's posing as your thesis advisors, instead post a rant about your failure on HN and have those same advisors give you a snarky reply with how to do it correctly ( you even get references to correcting literature!)

Re: Electron band structure in germanium, my ass (2000)

#37
post #23

I guess this must be from '99. Consequently the author went to get his Masters and PhD in CS.[0] Having gone through a similar ordeal and frustration at the end of my uni career, in the end I went out with the highest admiration for the experimentalists and their tech staff. [0] https://pages.cs.wisc.edu/~kovar/cv.html

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