260 reputation
111
bio website
location Marburg, Germany
age 29
visits member for 1 year, 11 months
seen Dec 17 at 15:41

I made a diploma in experimental physics. Now, I am a PhD student in theoretical physics.


Nov
15
comment Lattice and carrier temperature
But, consider the Fermi distribution I described in my question. If you do not lose carriers, than the number of electrons and holes must be the same. You get the number of carriers by integrating the distribution and then you obviously need a different temperature for electrons and holes since they have a different mass and chemical potential.
Nov
14
comment Lattice and carrier temperature
Is there a good estimate how the hole temperature differs from the electron temperature?
Nov
13
asked Lattice and carrier temperature
Sep
24
awarded  Autobiographer
Sep
9
asked Connection: Work on dipole <-> optical absorption
Aug
14
asked Effective masses for different direction
Mar
21
comment Temperature of gases
@Danu You're right. I just wanted to give a hint into the right direction. That's why I just commented, and did not answered.
Mar
21
comment Temperature of gases
You should have a look at the ideal gas law: $pV=NRT$. If you decrease the volume $V$ but pressure $p$ and number of particles $N$ stay constant, the temperature $T$ must increase. And vice versa.
Jan
28
comment Can a mass matrix be asymmetric?
Could you be more precise? What mass matrix are you talking about, an effective mass tensor as for a semiconductor? Or the mass matrix of analytical mechanics?
Jan
17
awarded  Yearling
Nov
6
comment Rotate vector in spherical coordinates
@tpg2114 Ok I see your point.
Nov
6
comment Rotate vector in spherical coordinates
@tpg2114 Then think of an integral containing a Coulomb potential. In my opinion this is a very direct connection to physics.
Nov
6
awarded  Popular Question
Aug
21
asked Is it possible to excite a semiconductor @ k=0?
May
3
comment Coulomb interaction and conservation laws
So you are saying that these 2 Hamiltonians are not comparable? If the quantum chemistry Hamiltonian describes totally different situations (molecules instead of charge carriers), of course I can say nothing about it... I was assuming that the Hamiltonians describe the exact same thing.
May
3
comment Coulomb interaction and conservation laws
@MichaelBrown I suggest you convert your comment into an answer.
May
3
comment Coulomb interaction and conservation laws
Ok. I think the quantum chemistry book just took a bad convention... Always trust the physicists if you have the choice :)
May
3
comment Coulomb interaction and conservation laws
I agree with Michael Brown, the conservation laws must be somehow 'integrated' into the definitions of the indices. For a reference, see Haug/Koch, Quantum theory of the optical and electronic properties of semiconductors. They derive your first Hamiltonian.
May
3
comment Sign crazyness on the stress energy tensor?
I guess it depends on the definition of the relativistic position vector. One definition is $a^\mu = (x,y,z,ct)$, the other is $a^\mu = (x,y,z,ict)$. This can cause inconsistency of all quantities that are derived from them. Hope this helps to track this down...
May
2
accepted Hydrogen wave function in momentum space