I am a PhD student of Hong Kong University of Science and Technology. I
want to use KWANT to caculate Hall resistance of a Hall bar structure.We
can get the conductance between 6 electrodes, but how to get hall
resistance? Can you give me some help? Thank you very much.
I am trying to install Kwant on a Win 10 PC. I followed the steps https://kwant-project.org/install but cannot finish the final step successfully. The command window says “no module named pip” after I execute
python -c "import pip, glob; pip.main(['install', '--no-deps'] + glob.glob('*.whl'))"
and “python3 is not recognized as an internal or external command, operable program or batch file”
after I execute
python3 -c "import pip, glob; pip.main(['install', '--no-deps'] + glob.glob('*.whl'))"
What is the possible problem?
Sent from Mail for Windows 10
Dear developer of Kwant：
I'm a freshman of Kwant. Recently, I want to calculate the conductance of Superconductor junction.
Let me take the p+ip topological superconductor as the example. Its Hamiltonian is like
with \sigma, \tau is the Pauli matrix for spin and particle-hole.
It have particle-hole symmetry:
My question is how to write down the K (complex conjugate) operator?
Having gone through the tutorials (up to Plotting Kwant Systems and Data in
Various Styles), I am a bit stuck adapting that tutorial and the ones it
builds upon to draw a simple zigzag nanoribbon, with the hopping shown and
the probability densities shown using circles corresponding to the
amplitude (trying to show that the edge state decays into the bulk).
The tutorial (and most of the graphene themed tutorials preceding it)
always use a circle as the scattering region and then build a quantum dot,
add some leads... etc.
Is there a simple example out there showing how I can build a zigzag
nanoribbon, just using nearest neighbour hopping, and extract the
wavefunction and draw said nanoribbon exactly like the figure at the end of
the 2D part of that tutorial.
I want to find conductance of a heterostructure using semicon library. When
I just use coords='z', everything is OK. But, when I want to change it to
two dimensions like 'xz', I encounter an error. Would you please tell me
how I can fix it? I hope it is not just a simple mistake which I am not
aware. Your time and consideration are greatly appreciated in advance.
Please find attached the code correspondent to what I mentioned above.