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richard-evans / vampire

Atomistic simulator for magnetic materials
GNU General Public License v2.0
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How to apply spin polarized current for STT induced dynamics calculations? #109

Open karpathyan opened 2 months ago

karpathyan commented 2 months ago

Hi, I'm trying to do a simulation where we try to move the Skyrmions and domain walls with a spin-polarized current via STT. How can I apply a spin-current? I have seen papers where they did the same thing with VAMPIRE, I looked in the manual and also in the workshop examples. I could not find anything. 

  Thanks for any assistance!
xbunax commented 2 months ago

I have submit a pr, which can control the electrical strength and shape.

karpathyan commented 2 months ago

I have submit a pr, which can control the electrical strength and shape.

Hi, thank you for the response. I looked at your PR and it applies an electric field. What want is a spin polarized electric current.

xbunax commented 2 months ago

I have submit a pr, which can control the electrical strength and shape.

Hi, thank you for the response. I looked at your PR and it applies an electric field. What want is a spin polarized electric current.

yes, the stt is induced by current. So which parameter do you want to change. In VAMPIRE, the stt field is applied by spin-transfer-torque which contents $a_J$ and spin-transfer-torque-polarization-unit-vector

karpathyan commented 2 months ago

I have submit a pr, which can control the electrical strength and shape.

Hi, thank you for the response. I looked at your PR and it applies an electric field. What want is a spin polarized electric current.

yes, the stt is induced by current. So which parameter do you want to change. In VAMPIRE, the stt field is applied by spin-transfer-torque which contents aJ and spin-transfer-torque-polarization-unit-vector

Thank you, can you please share an example simulation if you have one? Because I could not find the options for spin-transfer-torque in the Vampire tutorial.

xbunax commented 2 months ago

I have submit a pr, which can control the electrical strength and shape.

Hi, thank you for the response. I looked at your PR and it applies an electric field. What want is a spin polarized electric current.

yes, the stt is induced by current. So which parameter do you want to change. In VAMPIRE, the stt field is applied by spin-transfer-torque which contents aJ and spin-transfer-torque-polarization-unit-vector

Thank you, can you please share an example simulation if you have one? Because I could not find the options for spin-transfer-torque in the Vampire tutorial.

you can git clone and switch to develop branch，use ripgrep to grep this flag if you have