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If you are seeking help with a...

Feb2313 08:41 AM
ZapperZ

1 
24,761 
In XRD, to examine the diffraction pattern and the determine the elemental structure, a thin layer of sample is...

Oct1709 12:58 PM
Modey3

1 
1,906 
I know that placing a paramagnetic molecule inside a magnetic field will induce a magnetic force on the molecule from...

Oct1509 02:34 PM
kanato

1 
1,428 
I was just studying the Bhor theory and found that if we assume energy is quantised in (nh/2pi) then we can say...

Oct2009 08:36 AM
Doc Al

1 
1,024 
surface plasmons not exist for transverse electric polarisation? and only exist for transverse magnetic polarisation...

Oct2209 04:05 PM
squeezed>

1 
1,992 
This question is directed at resident theoretical electron physicists in PF
Regarding Azimuthal Quantum Energy...

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

May2914 11:31 PM
rigetFrog

1 
779 
I can't derive it properly even though it should be easy:
From Newtons 2nd law:
m dv/dt = eE
=>
v(t) =...

May2914 11:21 PM
rigetFrog

1 
994 
I'm having difficulties understanding the role of scattering on phase coherence in the Aharonov Bohm Effect.
In...

Jul1814 01:14 PM
M Quack

1 
1,174 
I want to use the ray tracing software ZEMAX to calculate reflection and absorption using thin metal oxide coatings on...

May2914 11:19 PM
rigetFrog

1 
958 
I've just begun to study spectroscopy, and I need a clarification about the Doppler Effect.
Consider a cell...

May2914 11:17 PM
rigetFrog

1 
950 
what are the different mechanisms that cause plasma emission?

Jul2314 11:34 PM
Greg Bernhardt

1 
709 
Below is part of derivation of the boltzmann equation in an electric and magnetic field.
I don't understand how to...

May2914 11:13 PM
rigetFrog

1 
866 
Suppose you have a body floating in a rotating superfluid. Maybe a speck of dust. Would it rotate?
What if you...

May614 07:10 PM
Greg Bernhardt

1 
523 
Hi, I am looking for an introduction to heat capacity measurements at low temperature (10K). (For example for...

May2914 10:56 PM
rigetFrog

1 
636 
How would react ion of some gas (low energy anion or cation) in vicinity of a grounded metal surface or in vicinity of...

May914 02:19 PM
mr.smith

1 
740 
Hello all,
Does anyone knows what is the exact energy gap of Titanium Nitride (TiN) film? Is it indirect band gap...

Jul2314 11:34 PM
Greg Bernhardt

1 
735 
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 
499 
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 
507 
Hi all
I was trying to understand the BornBethe approximation related to cross sections for atomic and molecular...

May414 10:46 PM
Greg Bernhardt

1 
599 
hello everyone..
1) what is the magnetic properties for indium oxide? i hope that it has ferrimagnetic properties...

Apr2414 10:39 AM
UltrafastPED

1 
405 
Hi,
I am numerically solving the 2D effectivemass Schrodinger equation
\nabla \cdot (\frac{\hbar^2}{2} c...

May614 11:48 PM
Greg Bernhardt

1 
530 
I know that at early stage (around 1999), GW implementation uses Matusbara frequency to help calculating self energy,...

May2714 02:03 PM
Greg Bernhardt

1 
612 
Hi,
I've been reading about critical exponents and how they're related in any system. I've seen how, for example,...

May1314 01:36 PM
Timo

1 
568 
I am reading a book about the interaction between atom and photon. I don't understand the following statement:
"for...

May1314 03:38 AM
Zarqon

1 
533 
I am learning Ashcroft's Solid State Physics. In the Electrons in a Weak Periodic Potential, I got some problems.
...

May1314 10:47 PM
Simon Bridge

1 
540 
Orthogonal plane waves can be used to expand Bloch waves. It is better than plane waves because it converges more...

May1814 09:49 AM
bsmile

1 
483 
I know one can find the "near field" length of an illuminated diffraction grating by calculating the Talbot Length,...

May1614 11:18 AM
Claude Bile

1 
505 
In the following http://electrons.wikidot.com/solarcells
it mentioned that
how and when nside becomes positive?

Jun1414 05:34 PM
Greg Bernhardt

1 
1,035 
Hi all,
I am working on DFT calculations using SIESTA. I have obtained the Hamiltonian file (.HSX) from the...

Jun2514 07:45 PM
Greg Bernhardt

1 
1,322 
Thinking back to my undergraduate years in Chemistry 101, it always struck me as strange that mercury, a transition...

Jun1414 07:05 PM
SteamKing

1 
831 
Hi,
Does anyone know where I can find the dielectric function of PTFE (Teflon) ?
Thank's

Jun2614 10:36 PM
Greg Bernhardt

1 
1,307 
Hi everyone,
I am working with a solar cell realized with a metalsemiconductor junction. I need to find an...

Jun2514 10:07 AM
UltrafastPED

1 
1,295 
Hi everyone,
In this paper ( http://pubs.acs.org/doi/abs/10.1021/la962131c ), the authors calculate the surface...

Jul114 10:14 PM
Greg Bernhardt

1 
1,439 
There is such subclass of capacitors with name ''pseudocapacitors'' which seem to use ''fast faradaic reactions''....

Jul114 10:14 PM
Greg Bernhardt

1 
1,367 
I need help with something that i seemed to remember was fairly easy, but just can't seem to find the simple formula...

Jul1014 04:15 PM
mfb

1 
606 
Hi everyone!
I run the software ABINIT. It allows one to model solids as a planewave pseudopotential. Since it is...

Jul714 04:06 PM
rigetFrog

1 
1,222 
Hey guys, I've recently read about the TavisCummings and Dicke models and I got a little bit confused about them....

Jul914 06:20 AM
f95toli

1 
786 
It's known that the Density of States in 2D is given by,
g_2(E)dE = \frac{a^2m}{\pi\hbar^2}dE
The density of...

Jul2014 10:29 AM
rigetFrog

1 
767 
Hello everybody,
this is my first time being here. I am a beginner learning some introductions on BoseEinstein...

Jul2114 07:57 AM
DrDu

1 
561 
Hello!
I was wondering what would happen if you placed a piece of undoped Si in an external electric field (say,...

T 12:04 AM
Sunfire

1 
64 