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Atomic, Solid State, Comp. Physics

- Exp. & theo. methods for atoms, molecules, condensed matter
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Feb23-13 08:41 AM
ZapperZ
1 20,833
could someone explain me this effect ?? i know that , is due to the diffusion of atoms by the existence of...
Sep4-09 07:46 AM
DiffusionGuy
1 4,798
Dear All, I would like to know advantages and disadvantages of various detectors like solid state SiLi detector,...
Sep4-09 01:38 AM
retaw
0 1,593
I have been asked to solve a diffusion equation with a source term using finite differences method. I need to...
Sep3-09 10:08 AM
pafcu
1 4,213
To the moderator: Please shift this to the appropriate forum if this isn't the place for it. EDIT -- It seems this...
Sep3-09 05:43 AM
maverick280857
0 2,976
what possible explanation to an unexpected peak that may appear in an XRD pattern of a pure material , what causes,...
Sep1-09 11:07 AM
bpsbps
4 1,969
What is the advantage/disadvantage of Cobalt X-ray tube over Copper X-ray tube in a X-Ray diffractometer
Sep1-09 09:45 AM
nasu
1 973
I understand that when two nuclei combine to form another nuclei . the resultant nucleon will have a lower mass than...
Aug30-09 11:52 PM
vin300
24 4,751
Is spontaneous atomic disintegration possible under current knowledge? I mean hypothetically if we could isolate one...
Aug30-09 08:52 PM
Redbelly98
5 1,965
Hello, I'm studying pseudopotentials right now, and I had an epiphany that the pseudo-wavefunction is really...
Aug29-09 07:07 PM
kanato
3 1,267
Hi everyone, I have a 4000 word essay to write for my solid state physics course, and I just thought I'd ask for a...
Aug29-09 08:40 AM
adamjford
0 769
Hi everyone, My very first post after simply using physicsforums as a (very) handy FAQ resource. Okay, so my...
Aug29-09 08:24 AM
adamjford
10 4,760
Dear all, We are planning to buy XRay diffractometer. I want the specification of latest Diffractometer. My samples...
Aug28-09 06:24 AM
retaw
0 1,113
Hi I'm new, to this forum and molecular science Reading a bit about molecular orbitals, and I have to say the whole...
Aug28-09 01:35 AM
PhaseShifter
7 1,675
How is the absorption coefficient per unit path length determined for excitation sites in a host crystal with an...
Aug27-09 04:11 PM
olgranpappy
3 1,040
We all know, Bragg's law , n\lambda=2dsin\theta where 2dsin\theta=path difference. In the derivation of the path...
Aug27-09 07:01 AM
manofphysics
4 2,015
Hi, The current density due to field emission on a surface is described by the Fowler-Nordheim equation J =...
Aug27-09 06:56 AM
pafcu
0 971
Hello people, I'm studying now phase transitions. I saw that the order parameter of water gas-liquid transition is...
Aug26-09 07:05 PM
PhaseShifter
3 4,581
In 2-D crystal systems, there are 5 lattice types. Primitive parallelogram, primitve rectangle, centered...
Aug25-09 10:48 PM
scivet
0 1,079
In order to grow MWCNTs I need to have certain content of water vapor dissolved in the argon gas. The amount of water...
Aug25-09 12:09 PM
compton1
0 869
Hi there! In thermal field theory, the Matsubara frequencies are defined by \nu_n = \frac{2n\pi}{\beta} for bosons...
Aug24-09 02:48 PM
leastaction
2 1,018
Hi all: I am confused about how far spin magnetic moment goes during a finite diffusion time (such as 100 ms). As we...
Aug23-09 03:34 PM
xfshi2000
0 1,734
I need to determine possible sigma and pi orbitales of C2H4 molecul using theory of group representations and...
Aug23-09 12:22 PM
vedo
2 4,582
"When a wavefront of X-rays strikes an atom, the electrons in that atom interact with the X-rays and immediately...
Aug23-09 12:20 PM
olgranpappy
1 1,055
Hi every one I have a question regarding the k-points and I was wondering if any one can guide me in the right...
Aug23-09 10:37 AM
subasa
4 2,431
how does the exchange coupling mechanism work that produce the ferromagnetic properties of materials?
Aug22-09 08:12 PM
olgranpappy
5 6,569
Hello, there. I'm having a small problem with Miller's indices. 1) Imagine that the plane (2 1 1) is given in the...
Aug22-09 02:46 AM
PhaseShifter
7 5,656
I know the formulas for the length and velocity forms of the photodetachment cross section for an electron with energy...
Aug21-09 05:55 PM
olgranpappy
1 1,101
The electron-lattice interaction potential is given by V(r)=\sum_{i} Q_{i}\nabla V_{ei} \left( r- R_i\right) ...
Aug21-09 05:54 PM
olgranpappy
1 1,352
Madelung constant is define like A=\pm\sum_j\frac{1}{p_{ij}} So I can always say A+X=-(A-X) or -A=A Can...
Aug21-09 02:39 AM
olgranpappy
1 2,707
Hello, i ve got some questions on spectroscopy. surface states and quantum well states have free-electron like...
Aug21-09 02:38 AM
olgranpappy
1 920
So this is a very novice but sincere question. I've just done a bit of reading about Bose-Einstein condensates, and...
Aug18-09 10:00 AM
Cthugha
6 1,061
I wanted to know in depth in piezoelectric sensors,their EMCF,different materials,groups working on material...
Aug17-09 08:30 PM
paramahamsa
4 1,179
My research group is considering purchasing a new sputtering system for our lab and I've found two configurations for...
Aug17-09 08:18 PM
aanidaani
0 2,487
Do yoh have some nice picture to show why the primitive vectors of basic cubic lattice are ...
Aug17-09 07:54 PM
aanidaani
2 2,228
why the electrons don't collapase into the proton-center of the atom? is it centrifugal force? thanks
Aug17-09 10:26 AM
Bob S
2 1,617
How does disorder (such as structure defect, doping,substitution, etc. )change superconductors' Tc?No matter what kind...
Aug17-09 06:58 AM
ZapperZ
1 1,015
in the bose-hubbard model, we need to enumerate all the possible basis usually, the basis vectors are taken as the...
Aug17-09 04:01 AM
wdlang
2 2,129
its being said, " more the loss of energy, more the strength of the covalent bond" revered members, could u explain...
Aug16-09 11:46 AM
Ygggdrasil
3 1,244
I am a mathematician, and I am trying to figure out a physics paper for my research. I am not a physicist but I have...
Aug15-09 12:11 PM
deepurple
2 2,112
I(\vec{n}-\vec{m})=\frac{1}{N}\sum_{\vec{k}}I(\vec{k})e^{i\vec{k}(\vec{n}-\vec{m})} ...
Aug15-09 10:57 AM
saaskis
4 1,560

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