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Feb2313 08:41 AM
ZapperZ

1 
20,809 

 
 
 

 
 
 
Hi all
I was trying to understand the BornBethe approximation related to cross sections for atomic and molecular...

Y 01:55 AM
vrinda mukund

0 
77 
Hello,
as we all know, in compound solids atoms are always vibrating with some degree, depending on the temperature...

Y 06:16 AM
M Quack

2 
109 
Can an atom be considered as an example of a dipole? It has positive charge in the nucleus and negative charge around...

Apr2014 06:31 AM
Vanadium 50

2 
156 
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 
193 

 
 
 
For arbitrary Fermionic self energy, \Sigma(i wn) with wn=(2n+1)pi T, its real part is always an even function of wn...

Apr1614 11:46 AM
bsmile

0 
194 
Hello,
I'm currently writing a chemistry program. The user can create any kind of atom he can imagine, and then...

Apr1914 09:04 PM
SteamKing

1 
194 
Hi,everyone,there is an important formula of DOS as follows,
D_{n}(E)=\frac{Ω}{(2\pi)^{3}}\int_{BZ}dk\delta (1) ...

Y 07:43 PM
Simon Bridge

5 
220 
Hi,
Could anyone explain how the affect that PN junction depth has on the performance of a semiconductor device?...

Apr2014 12:20 PM
M Quack

1 
227 
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 
228 
Hi, I am looking for an introduction to heat capacity measurements at low temperature (10K). (For example for...

Apr914 12:10 PM
kuecken

0 
229 
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 
231 
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 
241 
Hello All!
I was wondering if anyone can tell me if or if not the wavefunctions used to construct the electron...

Apr1514 10:17 PM
sidiq

2 
250 
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 
257 

 
 
 
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 
259 
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 
262 
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 
286 
I knowbecause of Noether's theoremthat continuous rotational symmetry implies conservation of angular momentum,...

Apr2014 05:13 AM
M Quack

2 
290 
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 
291 
http://www.supraconductivite.fr/media/images/pages/image012.gif
In the above picture it is clear that the...

Apr1214 09:11 AM
paulzhen

4 
293 
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 
302 
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 
303 
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 
325 
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 
335 
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 
345 
Hello Guys!
I have been studying electromagnetic waves (EMW) interaction with matter lately and I just derived the...

Apr914 01:38 PM
nasu

3 
350 
Hello,
Are the electrons at the fermi level regarded as the "free electrons" of the metal?
Also, how does one go...

Apr1514 12:32 AM
Simon Bridge

4 
354 
Does Janak's Theorem predicts Ionization energies better than it predicts Electron Affinities, similar to Koopman's...

Mar3014 12:07 PM
supw

0 
369 
What is "thermal rounding"

Nov2113 06:41 AM
fizikbrat

0 
381 
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 
389 
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 
394 
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 
402 
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 
409 
Hi
If we fabricate a heterojunction from TiO and lead phthalocyanine (PbPc is an organic semiconductor) by thermal...

Nov2813 03:27 AM
r.sahebi

0 
431 
The surface photovoltage effect suggests that the potential at the surface of a semiconductor will change when it is...

Jan2114 02:51 PM
arrektor

0 
431 
Referring to the following journal by R. Hao et. al., J. Cryst. Growth, 337, 81, (2011):
From this sentence, a...

Jan2114 09:50 PM
maxxlr8

0 
434 