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Feb2313 08:41 AM
ZapperZ

1 
20,690 
Question statement: We are given that Ca and CaF2 are both Ca facecentred cubic lattices, and that in the case of...

T 04:02 AM
Ichimaru

0 
23 
Hello All!
I was wondering if anyone can tell me if or if not the wavefunctions used to construct the electron...

Y 10:17 PM
sidiq

2 
138 
Hello,
Are the electrons at the fermi level regarded as the "free electrons" of the metal?
Also, how does one go...

Y 12:32 AM
Simon Bridge

4 
235 
Hello,
I see a Hamiltonian of spinorbit coupling, it is like this
H=\frac{1}{2m} \sum_{\alpha} \left( \left(...

Apr1414 09:13 PM
Tianyou

4 
215 
I read this:
I don't see why the electron spin affected the number of lines to go up in some atoms and not in...

Apr1414 09:02 AM
DrClaude

1 
152 
I'm supposed to give a seminar tomorrow for my 300 level experimental physics paper. The experiments we do our reports...

Apr1414 02:49 AM
cooev769

9 
189 
When we connect P and N materials, electrons from N drift to P, thus create negative ions in P and positive ions in N....

Apr1314 05:18 AM
Goodver

2 
177 
Hi.
According to this page and other sources I found the zcomponent of the electronic magnetic moment is greater...

Apr1314 03:45 AM
mfb

3 
168 
http://www.supraconductivite.fr/media/images/pages/image012.gif
In the above picture it is clear that the...

Apr1214 09:11 AM
paulzhen

4 
199 
Published values for the room temperature thermal conductivity of graphene vary from ~2000 W/m*k to 5600 W/m*k, for...

Apr1114 10:59 AM
christopher.s

0 
157 
I had a random idea and wanted to know whether graphene could retain it's conductive properties after being exposed to...

Apr1014 05:57 PM
jlopezfis

3 
479 
Phonons are said to be the result of the quantization of crystal waves.Let the function u=u_0...

Apr1014 06:46 AM
Zarqon

1 
211 
How would react ion of some gas (low energy anion or cation) in vicinity of a grounded metal surface or in vicinity of...

Apr1014 03:00 AM
mr.smith

0 
150 
Hello Guys!
I have been studying electromagnetic waves (EMW) interaction with matter lately and I just derived the...

Apr914 01:38 PM
nasu

3 
262 
Problem statement:
The Bragg angles of a certain reﬂection from copper is 47.75◦ at 20◦C but is 46.60◦ at 1000◦C....

Apr914 01:26 PM
nasu

1 
197 
If ptype semiconductor and ntype semiconductor of a diode are equally doped, and if the diode is forward biased,...

Apr914 01:22 PM
M.Kalai vanan

0 
121 
Hi, I am looking for an introduction to heat capacity measurements at low temperature (10K). (For example for...

Apr914 12:10 PM
kuecken

0 
146 
Hello all,
I'd truly appreciate if you could provide me with guidance on this. I'm trying to find the electric...

Apr914 11:51 AM
npathmat

0 
152 
I cannot wrap my head around this stuff. Sorry if long post.
I understand that emission lines come from a higher...

Apr814 03:23 AM
Zarqon

1 
202 
Does atoms in a crystal have energy states like electronic states? it is according to Einstein relation for harmonic...

Apr714 11:55 PM
jlopezfis

1 
243 
Hi guys,
I am going to get a shot to perform a short experiment of my choosing with an FTIR device.
Do you have any...

Apr714 05:36 PM
jlopezfis

6 
867 
What is the significance/physical interpretation of Fractional Occupation Numbers in DFT?

Apr714 02:35 PM
Useful nucleus

5 
382 
Hi, I have problems with the following:
Number of modes for a 2d crystal with one atom per primittive unit cell.
...

Apr514 01:56 PM
DrDu

1 
319 
I am reading a paper about Random Graph Theory and Percolation theory and it keeps talking about infinite clusters and...

Apr414 11:06 AM
joshthekid

0 
251 
How is it exactly i convert between a kspace sum an integral?
Assume that we have some macroscopic solid. Periodic...

Apr314 02:50 PM
DrDu

2 
405 
Two questions, really:
I’m finding it hard to wrap my head around the connections between kspace and realspace...

Apr314 04:50 AM
f95toli

7 
502 
I've tried searching for it but while there are a lot of hits on the fact that graphene's conductivity is high, there...

Mar3014 07:28 PM
Simon Bridge

3 
330 
How exactly does superfluidity occur in helium 3? I have heard that the nuclei of the helium atoms form pairs...

Mar3014 12:48 PM
lizzie96

0 
321 
Does Janak's Theorem predicts Ionization energies better than it predicts Electron Affinities, similar to Koopman's...

Mar3014 12:07 PM
supw

0 
297 
On the attached file the tight binding dispersion for a 2d square lattice is described. It is then assumed that the...

Mar3014 08:58 AM
aaaa202

0 
275 
Hi all,
could you suggest me references that can help me in the following calculation?
I would like to see how to...

Mar2614 02:28 AM
DrDu

1 
424 
So I was looking through the internet on how one could improve the efficiency
of a vacuum system (with a diffusion...

Mar2514 11:19 PM
rkum99

11 
1,460 
I had a random idea about the effect of cosmic rays on graphene's conductivity. I found out that cosmic rays would...

Mar2514 01:46 PM
UltrafastPED

3 
419 
Below is part of derivation of the boltzmann equation in an electric and magnetic field.
I don't understand how to...

Mar2514 05:41 AM
aaaa202

0 
418 
Hello. I started studying DFT and using it for a bit of work I needed to do in College. I found it a bit interesting,...

Mar2314 10:18 PM
t!m

5 
1,017 
Hello,
I just read a question about the Ising model, and this reminds me of an old interrogation I had long ago. It...

Mar2314 10:08 PM
t!m

8 
983 
Supposing that some solid can exist at 2 different phases (had 2 different crystalline structure) at some temperature...

Mar2314 04:31 PM
DrDu

6 
422 
Hi,
could someone direct me or recommend me some materials which deal with those problems?
I would like to get...

Mar2314 08:50 AM
ZapperZ

1 
362 
Hi all
Can someone please describe how the form factor used in Rutherford scattering is applicable to neutron...

Mar2214 03:41 AM
M Quack

1 
458 
hi all...
I have written codes for 2d fdtd tfsf with berenger's pml absorbing boundary. But I have serious leakage...

Mar1814 04:13 AM
DrDu

8 
625 