Arbitrary spin polarization for the incident wave
Hi all,
I am working on a spin resolved scattering problem using Kwant. The setup
is a simple heterojunction composed of normal metal and spin-orbit coupled
systems. I want to calculate the probabilities of spin-flipped and
spin-conserved reflection. In the normal metal, I use two lattices for
spin-up and spin-down states, and the calculation went well. The
probabilities for spin-flipped and spin-conserved reflection can be read
through inter- and intra-lattice scattering. Now I want to calculate the
scattering problem for an incident wave with spin polarization in the
x-direction.
My question: how to set the incident spin state along the x-direction and
calculate the corresponding spin-flipped (spin in -x direction) and
spin-conserved scattering probabilities?
Thanks very much!
Best,
Wei
--
College of Science, University of Aeronautics and Astronautics, Nanjing,
210016, P. R. China
E-mail: pchenweis@gmail.com
Hi Wei,
Please check tutorial for dealing with conserved quantities, that we
introduced in the latest version of Kwant. That approach allows you to
easily compute spin conductance along any direction (and you don't
have to manually introduce sublattices). For more details please see
the tutorial: https://kwant-project.org/doc/1/tutorial/superconductors#superconductors-orb...
Best,
Anton
On Tue, Jan 23, 2018 at 1:27 PM, Wei Chen
Hi all,
I am working on a spin resolved scattering problem using Kwant. The setup is a simple heterojunction composed of normal metal and spin-orbit coupled systems. I want to calculate the probabilities of spin-flipped and spin-conserved reflection. In the normal metal, I use two lattices for spin-up and spin-down states, and the calculation went well. The probabilities for spin-flipped and spin-conserved reflection can be read through inter- and intra-lattice scattering. Now I want to calculate the scattering problem for an incident wave with spin polarization in the x-direction.
My question: how to set the incident spin state along the x-direction and calculate the corresponding spin-flipped (spin in -x direction) and spin-conserved scattering probabilities?
Thanks very much!
Best, Wei
--
College of Science, University of Aeronautics and Astronautics, Nanjing, 210016, P. R. China
E-mail: pchenweis@gmail.com,
weichenphy@nuaa.edu.cn
Hi Anton,
That's great! Thanks for the quick response.
Best,
Wei
2018-01-23 15:08 GMT+01:00 Anton Akhmerov
Hi Wei,
Please check tutorial for dealing with conserved quantities, that we introduced in the latest version of Kwant. That approach allows you to easily compute spin conductance along any direction (and you don't have to manually introduce sublattices). For more details please see the tutorial: https://kwant-project.org/doc/1/tutorial/superconductors# superconductors-orbital-degrees-of-freedom-conservation-laws-and- symmetries
Best, Anton
On Tue, Jan 23, 2018 at 1:27 PM, Wei Chen
wrote: Hi all,
I am working on a spin resolved scattering problem using Kwant. The setup is a simple heterojunction composed of normal metal and spin-orbit coupled systems. I want to calculate the probabilities of spin-flipped and spin-conserved reflection. In the normal metal, I use two lattices for spin-up and spin-down states, and the calculation went well. The probabilities for spin-flipped and spin-conserved reflection can be read through inter- and intra-lattice scattering. Now I want to calculate the scattering problem for an incident wave with spin polarization in the x-direction.
My question: how to set the incident spin state along the x-direction and calculate the corresponding spin-flipped (spin in -x direction) and spin-conserved scattering probabilities?
Thanks very much!
Best, Wei
--
College of Science, University of Aeronautics and Astronautics, Nanjing, 210016, P. R. China
E-mail: pchenweis@gmail.com,
weichenphy@nuaa.edu.cn
--
College of Science, University of Aeronautics and Astronautics, Nanjing,
210016, P. R. China
E-mail: pchenweis@gmail.com
participants (2)
-
Anton Akhmerov
-
Wei Chen