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Feb2313 08:41 AM
ZapperZ

1 
24,958 
In a perfect periodic crystal, do lattice vibrational modes corresponding to different wave vectors (kvectors)...

T 01:13 AM
DrDu

3 
117 
Hi,
I just read a paper on graphene's basic properties and it says that since current density J is given as
...

Y 05:00 PM
Greg Bernhardt

1 
200 
All the books that deal with the pn junction under applied bias asume that the same equations used for the...

Y 05:00 PM
Greg Bernhardt

1 
515 
I have been chewing up some time ago the SchottkyMott theory of Schottky Barrier height (which ignores the surface...

Y 05:00 PM
Greg Bernhardt

1 
350 
Hi Everyone,
I was curious as to what the most current model in solid state physics is. I've studied the Einstein...

Y 12:22 PM
irishhockey

0 
75 
Learing about matter and what it is composed of, I'm spending a lot of time trying to wrap my brain around the idea...

Y 07:59 AM
phinds

18 
470 
Hello!
I was wondering what would happen if you placed a piece of undoped Si in an external electric field (say,...

Y 12:04 AM
Sunfire

1 
104 
Hello everyone.
I am a Hungarian born Australian theoretical/applied physicist. This is my first post on the...

Jul2614 12:32 PM
steve_h

3 
641 
So if a Titanium Ion has a charge of +2, does that mean it has a whole charge of twice the electron charge....so 2Xe?

Jul2614 08:02 AM
adjacent

3 
333 
Hello.
I have been in contact with some papers that use DFT softwares for calculating properties of solids,...

Jul2514 03:25 PM
Useful nucleus

3 
365 
I knew this may not be possible, but I was wondering if you can compare kinetic energy with the energy that makes up...

Jul2514 03:06 PM
mathman

3 
300 
although the distance from the nucleus and shielding effect is more for 4s orbital than a 3d orbital ,but yet the...

Jul2414 04:56 AM
DrDu

2 
326 
what are the different mechanisms that cause plasma emission?

Jul2314 11:34 PM
Greg Bernhardt

1 
813 
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 
858 
How is it that certain electronic goods are designed to fail? Planned Obsolescence is just that, planned. So what goes...

Jul2214 07:25 PM
analogdesign

2 
672 
Hello everybody,
this is my first time being here. I am a beginner learning some introductions on BoseEinstein...

Jul2114 07:57 AM
DrDu

1 
667 
Hello!
I was just having a hard time understanding how reverse bias works for a pn junction. Put simply, why don't...

Jul2114 12:52 AM
analogdesign

4 
1,276 
i search all over the web but i cannot find the definition. Although I find all the literature saying that metal have...

Jul2114 12:50 AM
analogdesign

2 
1,025 
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 
858 
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 
1,296 
Hello I am trying to fabricate a Si reflecting solar cell.
When a Solar cell is exposed to radiation and connected...

Jul1714 01:05 AM
M Quack

3 
1,653 
This question is directed at resident theoretical electron physicists in PF
Regarding Azimuthal Quantum Energy...

 
 
 
Hi,
I'm studying the pn junction and I'm a little confused about the depletion layer that forms. I understand how...

Jul1614 01:35 PM
marcusl

2 
338 
Hello all,
My lab recently purchased a deformable lens, which can change its focal length from 140 mm to 40 mm and...

Jul1414 10:36 PM
Simon Bridge

12 
1,091 
According to solid state texts in Brillouin zone borders where diffraction condition satisfies we have a band gap....

Jul1414 06:28 PM
rigetFrog

3 
480 
To simplify this question, let's say the ocean is 3800 meters deep and 1 meter wide in either direction. Now let's add...

Jul1414 04:34 PM
M Quack

2 
318 
I have been looking into broadening mechanisms and I'm stuck at trying to provide a physical explanation for power...

Jul1314 03:36 AM
Carnot

3 
1,052 
Hi, there
I am reading the book called "AtomPhoton Interaction", the chapter of " Radiation considered as a...

Jul1214 11:54 PM
rigetFrog

2 
1,516 
I am reading section 8.5.1 of this book (page 442 of the book, page 465 of the pdf). The author claims the...

Jul1214 11:51 PM
rigetFrog

2 
1,461 
A new spintronic LED was invented by Utah physicists.
...

Jul1214 11:48 PM
rigetFrog

8 
1,859 
In ARPES measurements, people say that the laser light cannot cover a wide area of momentum space whereas the...

Jul1214 04:46 AM
vatlychatran

4 
1,334 
I'm new here and have a very basic question that I haven't been able to see answered here or elsewhere, so forgive the...

Jul1014 06:28 PM
mrhagerty

3 
747 
What is the proof for quantisation of electrons energy around an atom?

Jul1014 04:22 PM
M Quack

14 
1,537 
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 
632 
Hi all,
I'm working on a Green function chapter of my dissertation, am referencing the equation,
G(k,\omega) =...

Jul1014 02:02 PM
csmallw

3 
825 
hello,
i need the values for the absorption cross sections of positive hydrogen ions for a specific set of...

Jul1014 03:18 AM
Raezeman

5 
820 
to the untrained eye electrons and protons seemed to be very different, different size, mass and composition but they...

Jul914 03:02 PM
Filby

10 
1,096 
Suppose we have an interface between a semiconductor and a liquid electrolyte that contains a redox couple whose redox...

Jul914 12:05 PM
itaischles

4 
1,615 
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 
821 
Why is Bohr's model of an atom not able to explain the spectrum of atoms other than hydrogen? Can you give an example?...

Jul914 03:14 AM
Phy_enthusiast

9 
1,229 