
Before posting anything, please review the Physics Forums Global Guidelines.
If you are seeking help with a...

Feb2313 08:41 AM
ZapperZ

1 
25,701 
Hello Forum,
I have been studying phase diagrams. If a pure substance is brought to a temperature and pressure above...

Mar2312 02:53 AM
DrDu

11 
2,804 
I got quite confused with the math in ThomasFermi's approximation.
I thought it was supposed to approximate a...

Mar2312 04:31 AM
mzh

4 
2,722 
Hello,
As you all know, if a crystal contains a phonon of frequency \omega, it means that the fourier decomposition...

Mar2312 02:06 PM
sam_bell

20 
4,097 
Hi everybody,
What is lam band and dlam band? (RAMAN or any vibrational study)
Thanks in advace

Mar2312 03:40 PM
yokone_

0 
1,217 
Graphyne is a variant of graphene which has CarbonCarbon triplebonds:
http://physics.aps.org/articles/v5/24
...

Mar2312 05:27 PM
sanman

5 
2,978 
Why is it so important to claim that the topologically protected surface states are 100% spin polarized. Is there any...

Mar2312 11:21 PM
OhYoungLions

1 
1,867 
Hello.
I've experiment, which makes plasma using He1 under atmoshpere & room temp,it's to show how DBD plasma...

Mar2412 12:09 PM
MikeBH

1 
1,859 
Researchers used a DVD player to burn graphene oxide into graphene, demonstrating a very simple new method of...

Mar2612 10:23 AM
TouTorp

6 
2,108 
Hi,
I'm currently using the Monte Carlo Metropolis algorithm to investigate the 2D Ising model.
I have an NxN...

Mar2612 10:57 AM
M Quack

1 
1,618 
Hi, I was wondering if anyone could clarify for me what the correct regime is for treating the electrons in a material...

Mar2712 01:31 PM
SadScholar

2 
1,635 
Hi,
I'm reading a paper (please find it here arXiv 1003.2193v1) on zigzag Graphene nanoribbon (ZGNR). It discusses...

Mar2812 11:25 AM
hiyok

0 
1,181 
does anybody know the upper limit of the bcc and fcc metals like Fe, Cu, Ag? According to the fact that the planes...

Mar2912 02:46 AM
M Quack

1 
1,742 
i need the material properties of Tungsten Nitride. Here is a list of properties i need:
1.band gap at 300k
2.work...

Mar2912 03:16 AM
M Quack

1 
1,228 
In the Ek diagrams for a semiconductor material,what exactly is k?
is it just the quantized quantity in the bloch...

Mar2912 07:18 AM
M Quack

1 
2,390 
Who can explain the following questions about transfer matrix?
formula (31) in New Journal of Physics, Vol.12...

Mar2912 06:46 PM
PRB147

0 
1,442 
In Data Analysis of Spectroscopic Ellipsometry, what can i deduce from the graph of ε1 and ε2 against photon energy?...

Mar3112 02:26 AM
Zolo

0 
1,233 
In the fermi surface diagrams of the alkaline earth metals, in order to check the metallic behaviour, following...

Mar3112 05:07 AM
arpitloveslyf

0 
1,284 
hi,
I was reading an article about graphene and I came across some concepts I am not familiar with. I was just...

Apr112 08:02 AM
PRB147

2 
2,204 
I've been looking at various papers which describe the mechanisms and provide calculations describing heat flow into...

Apr112 02:07 PM
f95toli

2 
2,194 
I've read about wiregrid polarizers from wikipedia. The article says that waves perpendicular to the wires cannot...

Apr112 04:32 PM
mfb

1 
1,408 
I am working on an assignment here;
A linear chain with a twoatom primitive basis, both atoms of the same mass but...

Apr112 07:33 PM
Polyrhythmic

1 
2,570 
Okay, I am not sure if this is the right subforum, but here goes:
An einstein solid is a solid composed of N...

Apr212 08:15 AM
DrDu

17 
2,875 
want to calculate absorption coefficient or absorption crosssection for 1% C2H2 gas
Path length = 1meter
...

Apr312 03:21 AM
z.k

12 
26,046 
Hi everyone,
While reading about the BHZ model used to describe HgTe quantum well topological insulators, I read...

Apr312 08:28 AM
Minato

8 
2,371 
Go easy on me, as I have no formal condensed matter education and just the highest undergraduate quantum physics and...

Apr312 03:41 PM
M Quack

25 
5,238 
From http://www.lsbu.ac.uk/water/models.html, I see that are many models of water that can "explain" one or some...

Apr312 05:42 PM
fluidistic

3 
1,646 
Hi,
I have finished an experiment about vibronic transitions for the N_2 molecule and I'd like to compare my results...

Apr312 08:29 PM
Einstein Mcfly

2 
1,717 
In the limit of weak coupling, G\overline{ρ}<<1, the BCS pairing gap equation gives that Δ \propto...

Apr512 02:02 AM
DrDu

1 
1,275 
Hello,
I was looking to a method or a software to statisticaly determine the size of nanoparticles from SEM images....

Apr612 04:54 AM
physicist888

0 
1,064 
Hello everyone, I'm having a really confusing time trying to get my head around these concepts, so I will try to...

Apr612 08:26 AM
Mike H

10 
2,369 
Hey there,
maybe I posted this in the wrong forum. Does anybody know something about anyons here?
...

Apr612 05:48 PM
complement

0 
1,196 
I am a chemistry student and would like to know how to identify the g(parallell) and g(perpendicular peaks in the ESR...

Apr712 06:47 PM
Mike H

1 
1,471 
Hi all
How does one calculate the recoil velocity of a hydrogen atom when the electron in it jumps from a higher...

Apr812 06:45 AM
Vanadium 50

1 
1,738 
Hi,
I am a bit confused about the units of
L = (0.9λ)/(βcosθ)
the Scherrer equation used in powder...

Apr912 01:14 PM
NaN089

2 
2,496 
Hello All,
I have a question regarding complex permeability and permittivity, in particular, regarding their use...

Apr912 02:25 PM
M.Eng

2 
2,432 
I was working on calibrating some newly purchased software onto our lab computers when I noticed that the decay...

Apr1012 02:55 PM
Bob S

1 
1,144 
I am trying to understand the concept of extensive solubility. Generally, solubility is supposed to be an intensive...

Apr1012 08:36 PM
evguy75

0 
1,822 
The Seebeck coefficient is the differential drop in voltage per unit temperature across a conductor. Goldsmid says...

Apr1112 07:31 AM
M Quack

1 
1,944 
I'm teaching periodic trends in a Gen. Chem. course, and it's commonly mentioned that the radius of an Li+ ion (90 pm)...

Apr1112 06:23 PM
Useful nucleus

1 
2,607 
hi,
I've got a really great picture of the carbon atoms in a graphine (HOPG) sample, using STM technique (picture...

Apr1212 12:56 PM
M Quack

3 
1,734 