Recent content by dnvlgm

Hello, I am currently working on a pulsed laser deposition (PLD) system whose volume is approximately 115 to 120 liters. As you can assume, there are a lot of ports in the chamber but a lot of them are windows or blanks (2.75, 4.5 and 6 inch). Significant ports (possible sources of leaks...

Guys, all of you are talking about basic physics. In reality physics is much more than solving problems in a paper, actually it is far less about that. On the other hand, it is meaningless and borderline demeaning to try to compare it with other fields, you just don't do that. Physics is hard...

Yes, Illinois Tech is what I mean, I mentioned only American schools so it's a bit obvious, and considering research in condensed matter I couldn't really be an undergrad, undergrads barely know calculus. I really appreciate your response though and will follow your recommendation.

I got admitted to IIT and NIU although I am still waiting on FSU, UTD, UK and UIC. Any of the last four I mentioned I think are better than IIT and NIU considering that I am looking for a decent program in condensed matter (mainly nano, low temp & matter phases, superconductivity). However let's...

Electronic structure... The idea is to obtain the wavefunction of an exciton inside a nanorod which is covered by a thin organic layer. What I expect to see is a coupling (through excitonic resonance) of the Wannier (in the nanorod) and Frenkel (in the organic molecules) excitons. The idea is...

Whoa touche! that's a good point which might throw away my basic understanding of the problem. It seemed to me that I could do a rough but good enough estimate by accounting for the coupling of angular momentum but now it doesn't seem that way... what do you recommend? maybe I should not neglect...

You do realize this is a Wannier-Mott exciton we are talking about, right? If you look at a later post I mentioned the rod's length is 300amstrong which means it is delocalized and we can neglect the coulomb interaction, for its Bohr radius is way larger than the lattice constant

ok i guess i didnt give enough detail. The exciton is a Wannier-Mott exciton with Bohr radius much larger than the lattice constant. The geometry is considered within the boundary conditions of the electron wavefunction, such that for a cylinder of length L~300Amstrong we have...

So for instance i have an excitonic state in piece of semiconductor. It occurs to me that the total wavefunction Y would be the product of the individual wavefunctions of the electron and the hole, or Yexciton=yelectron*yhole and (lets say the semiconductor is a nanorod) in cylindrical...

Can anybody tell me what they mean by 2, 3, 6 or any band hamiltonians. What does it even mean?

Hi, I'm a double major in math and physics and i'll be trying to go for a phd. in physics. here's the problem, my GPA will end up being about 3.0 maybe a little more but not much more, and the way i see it, it seems that i could also use the GRE Physics subject test but the damn thing seems...