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Atomic, Solid State, Comp. Physics

- Exp. & theo. methods for atoms, molecules, condensed matter
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Jan16-12 Greg Bernhardt
Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Feb23-13 08:41 AM
1 25,760
The surface photovoltage effect suggests that the potential at the surface of a semiconductor will change when it is...
May29-14 11:31 PM
1 796
In Bragg’s spectrometer used to determine the wavelength of X – rays why should we make use of only NaCl crystal,cant...
Feb5-14 05:48 AM
M Quack
1 742
I can't derive it properly even though it should be easy: From Newtons 2nd law: m dv/dt = -eE => v(t) =...
May29-14 11:21 PM
1 1,017
Anyone know how hydrogen bonding in water can enhance "density fluctuation" ? And in first place What is "density...
Feb12-14 03:14 AM
1 917
I want to use the ray tracing software ZEMAX to calculate reflection and absorption using thin metal oxide coatings on...
May29-14 11:19 PM
1 988
I am bit confused by how to approach this concept with mean field theory. As I understand a symmetry break (like a...
Feb11-14 12:48 AM
1 756
Hello all, I have been learning to use FDTD to model light interaction with various materials. I've successfully...
Feb12-14 01:16 AM
1 858
I've just begun to study spectroscopy, and I need a clarification about the Doppler Effect. Consider a cell...
May29-14 11:17 PM
1 977
I think most of you are familiar with this model (sum runs over nearest neighbours): H = -J ∑S_iz * S_jz It...
Feb14-14 05:43 PM
1 790
Hey all, I was studying stimulated emission in lasers and I had a doubt regarding the same. When the electron...
Feb15-14 08:13 AM
Simon Bridge
1 951
I have a molecular dynamics code and I want to model the reaction of O with Mg to form MgO at arbitrary temperatures. ...
Feb20-14 07:38 PM
Useful nucleus
1 851
Hi All, Greetings! I have a 3d material and I use result from first principal for getting the potential...
Feb19-14 12:41 PM
1 787
I'm supposed to be working with an STM in the coming weeks to determining the Fermi Level of some semiconductor...
Feb23-14 03:34 PM
1 831
Should I use Quantum ESPRESSO or Material Studio? I want to compute some properties in Material
Mar15-14 03:19 AM
1 797
Hi all Can someone please describe how the form factor used in Rutherford scattering is applicable to neutron...
Mar22-14 03:41 AM
M Quack
1 595
Hi, could someone direct me or recommend me some materials which deal with those problems? I would like to get...
Mar23-14 08:50 AM
1 550
Hi all, could you suggest me references that can help me in the following calculation? I would like to see how to...
Mar26-14 02:28 AM
1 647
Below is part of derivation of the boltzmann equation in an electric and magnetic field. I don't understand how to...
May29-14 11:13 PM
1 886
Suppose you have a body floating in a rotating superfluid. Maybe a speck of dust. Would it rotate? What if you...
May6-14 07:10 PM
Greg Bernhardt
1 542
Hi, I have problems with the following: Number of modes for a 2d crystal with one atom per primittive unit cell. ...
Apr5-14 01:56 PM
1 540
Does atoms in a crystal have energy states like electronic states? it is according to Einstein relation for harmonic...
Apr7-14 11:55 PM
1 477
I cannot wrap my head around this stuff. Sorry if long post. I understand that emission lines come from a higher...
Apr8-14 03:23 AM
1 463
Hi, I am looking for an introduction to heat capacity measurements at low temperature (10K). (For example for...
May29-14 10:56 PM
1 658
How would react ion of some gas (low energy anion or cation) in vicinity of a grounded metal surface or in vicinity of...
May9-14 02:19 PM
1 755
Phonons are said to be the result of the quantization of crystal waves.Let the function u=u_0...
Apr10-14 06:46 AM
1 516
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...
Apr14-14 09:02 AM
1 529
Hi, Could anyone explain how the affect that P-N junction depth has on the performance of a semiconductor device?...
Apr20-14 12:20 PM
M Quack
1 525
Hello, I'm currently writing a chemistry program. The user can create any kind of atom he can imagine, and then...
Apr19-14 09:04 PM
1 536
Hi all I was trying to understand the Born-Bethe approximation related to cross sections for atomic and molecular...
May4-14 10:46 PM
Greg Bernhardt
1 623
hello everyone.. 1) what is the magnetic properties for indium oxide? i hope that it has ferrimagnetic properties...
Apr24-14 10:39 AM
1 434
Hi, I am numerically solving the 2D effective-mass Schrodinger equation \nabla \cdot (\frac{-\hbar^2}{2} c...
May6-14 11:48 PM
Greg Bernhardt
1 546
I know that at early stage (around 1999), GW implementation uses Matusbara frequency to help calculating self energy,...
May27-14 02:03 PM
Greg Bernhardt
1 635
Hi, I've been reading about critical exponents and how they're related in any system. I've seen how, for example,...
May13-14 01:36 PM
1 597
I am reading a book about the interaction between atom and photon. I don't understand the following statement: "for...
May13-14 03:38 AM
1 554
I am learning Ashcroft's Solid State Physics. In the Electrons in a Weak Periodic Potential, I got some problems. ...
May13-14 10:47 PM
Simon Bridge
1 567
Orthogonal plane waves can be used to expand Bloch waves. It is better than plane waves because it converges more...
May18-14 09:49 AM
1 501
I know one can find the "near field" length of an illuminated diffraction grating by calculating the Talbot Length,...
May16-14 11:18 AM
Claude Bile
1 526
In the following it mentioned that how and when n-side becomes positive?
Jun14-14 05:34 PM
Greg Bernhardt
1 1,148
Thinking back to my undergraduate years in Chemistry 101, it always struck me as strange that mercury, a transition...
Jun14-14 07:05 PM
1 933
Hi everyone, I am working with a solar cell realized with a metal-semiconductor junction. I need to find an...
Jun25-14 10:07 AM
1 1,494

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