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Feb2313 08:41 AM
ZapperZ

1 
26,221 
Why does the electric force vectors around a positive charge point outwards and the electric force vectors around a...

T 02:29 AM
anoopibs

3 
343 
Say we have a one dimensional chain of N mass points separated by springs of spring constant k. This system can be...

Y 09:00 PM
mfb

1 
86 
I have seen in some books that the triclinic bravais lattice ( a≠b≠c , α≠β≠γ ) excludes explicitly the option that...

Y 01:35 PM
donali_mambo

0 
87 
how the dispersion relation(i.e. Ek relation) affects carrier mobility in metals or semimetals?

Y 11:40 AM
DrDu

5 
2,138 
According to solid state texts in Brillouin zone borders where diffraction condition satisfies we have a band gap....

Y 03:17 AM
Douasing

4 
695 
Basically, I've written some code that take as inputs 1)Basis vectors 2)lattice translation vectors
and computes the...

Y 01:34 AM
M Quack

1 
178 
Hello,
I would like to implement SAB=<psiApsiB>which is the overlap of two KohnSham determinants (psiA and psiB...

Sep1614 05:55 PM
Greg Bernhardt

1 
293 
In solid state physics the "holes" usually regarded as an effective positive charge carriers.
In order to have...

Sep1614 04:47 PM
Sunfire

5 
205 
I was looking for information on how the photo electrons are emitted when under Xray radiation. In this ancient...

Sep1514 09:36 AM
msumm21

5 
1,640 
Hi there,
I have been researching an optical Ring Resonator and have been given the following values:
FSR=100GHz,...

Sep1514 01:01 AM
student_life

0 
231 
I have seriously stocked in the subject below.
According to Ashcrift & Mermin (chapter 13):
If the electrons...

Sep1314 03:03 PM
M Quack

1 
377 
Hi everyone, I'm little bit confuse about non destructive techniques such as XRD (Xray Diffraction) and Raman...

Sep1314 02:53 PM
M Quack

3 
304 
Hello every one,
Here in below figure we can see an ohmic contact formation between a metal and ntype...

Sep1114 02:17 AM
PF123

0 
328 
In Kittel's solid state text, problem 2.3, he says that the volume of the Brillouin zone is the same as a primitive...

Sep914 10:09 AM
M Quack

1 
439 
The torque contribution due to the uniaxial anisotropy is given by the equation below
\frac{\Gamma}{l_m K} = (2...

Sep814 11:08 AM
rigetFrog

3 
369 
Hi,
I am having trouble with this concept...
"A mean speed (c) is calculated by multiplying each speed by the...

Sep714 12:33 PM
Coop

5 
417 
We read that when a crystal used in the Mössbauer effect is cooled we enhance the odds of a nucleus emitting a gamma...

Sep714 08:55 AM
Spinnor

2 
242 
I understand there is some "leakage" current in a reversed biased diode but I don't understand why there is...

Sep614 10:10 AM
phy_infinite

20 
587 
Are delocalized holes and trapped holes (polarons) mutually exclusive? Most of the density functional theory...

Sep614 02:31 AM
DrDu

5 
339 
Hello,
If we let U and V be two single determinant wave functions built up of spin orbitlas ui and vj respectively,...

Sep514 10:16 AM
cgk

1 
290 
I am conducting an experiment on the parabolic trough that concentrates the solar light and heats up water. I am using...

Sep414 06:49 AM
Shunx

2 
313 
I have some XPS spectrums that I am trying to fit (my first time doing so), using XPSpeak.
I understand that for...

Sep314 06:50 AM
sum555

2 
514 
Hi!
Is anyone familiar with generating band structures from DFT simulations? I am using graphene, and am trying to...

Sep214 01:46 AM
DrDu

3 
2,811 
How can we translate realworld positions into a computer language? An example would be to simulate a ball bouncing...

Sep114 10:50 PM
t!m

2 
386 
I have done the computations of band structure of cobalt adsorbed graphene. In 3x3 supercell of cobalt adsorbed (one...

Sep114 08:32 AM
t!m

2 
406 
After specifying the primitive vectors of a structure namely (a,b,c) in Wien2k, one has to specify locations of atoms...

Sep114 07:51 AM
hokhani

3 
480 
Would one expect the emission and absorption spectral lines for Hydrogen to be at slightly different frequencies ? So...

Aug3114 01:57 PM
neilparker62

7 
630 
I was reading about ferrofluid and I was wondering how you would go about calculating the maximum size of a particle...

Aug3114 12:55 AM
Warpspeed13

12 
451 
"Volume of a primitive cell is independent of the choice of the cell."
Why?

Aug2914 07:41 AM
M Quack

1 
386 
Hi Physics Forums!
I'm a bit stuck here. I'm fairly sure I intuitively know the answer here, but am looking for...

Aug2714 06:07 PM
mfb

1 
399 
Hi, there.
I don't understand how the light travel in the medium which has the index of refaction below one
from...

Aug2714 07:53 AM
Simon Bridge

2 
396 
When light passes in glass, water etc then velocity is reduced and direction changes HOW?

Aug2514 07:50 AM
smk

2 
435 
I'm writing a little bit of Mathematica code that should be able to make a reasonable powder diffraction spectrum. The...

Aug2314 03:52 PM
M Quack

4 
546 
All the books that deal with the pn junction under applied bias asume that the same equations used for the...

Aug2114 03:05 AM
zhanghe

2 
1,202 
Why are absorption cross sections for atoms so much larger than that of molecules.
For example, the absorption...

Aug2114 02:33 AM
Simon Bridge

4 
534 
Dear mates:
During ionization with radiant energy there is a photon emission (see ...

Aug2014 09:56 PM
euquila

3 
439 
Hi people,
I'm researching about the interactions of two carbon atoms using the LennardJones potential and I need...

Aug1914 09:15 PM
Kjiel

2 
620 
I am trying to understand what is meant by the phrase 'absorbed and emitted bosons'. Is it the same as destroyed and...

Aug1914 12:41 PM
AlexanderRios

2 
520 
Hi,
I have a question regarding the temperature dependence of the light yield in scintillators.
I will attach a...

Aug1814 12:32 AM
e.bar.goum

2 
540 
what is the rule of delta E= A/r^12 _ B/r^6 ????

Aug1614 05:04 PM
Vagn

1 
490 