Skyrmion generation system

A system to generate skyrmions, comprising:

• a gun having:
• a wall-forming region made of a first material, the region delimiting an outer space made of a second material differing from the first material and an inner space made of a third material differing from the first material, the second material and the third material being magnetic materials, the region comprising a bottom wall and a side wall connected to the bottom wall at a junction zone,
• a half-bubble creation zone capable of generating half-bubbles, the creation zone being in the inner space, the creation zone comprising at least one of the following two elements:
• one or more defects of the wall;
• and
• part of the junction zone;
• and
• a half-bubble treatment zone comprising:
• an outlet in communication with the outer space, the outlet being capable of converting the half-bubbles to skyrmions, and
• a half-bubble propagation passage, the passage connecting the creation zone to the outlet,
• the treatment zone being able to limit the contact between the creation zone and the outlet also being able to convert the half-bubbles to skyrmions;
• and
• a magnetisation reversal device able to reverse magnetisation at the interface between the region and the inner space, the reversal device being selected from the group formed by:
• a first unit to inject current in a first transverse direction, the first unit being capable of injecting a spin-polarised current in the half-bubble creation zone with a spin-polarisation direction having a nonzero component along a second transverse direction, the first transverse direction and the second transverse direction being perpendicular to a longitudinal direction along which the gun extends;
• a first unit to inject current in a first transverse direction, the first unit being capable of injecting a spin-polarised current in the half-bubble creation zone with a spin-polarisation direction having a nonzero component along a longitudinal direction along which the gun extends, the first transverse direction being perpendicular to the longitudinal direction;
• a unit to apply an external magnetic field to the half-bubble creation zone;
• a unit to heat the half-bubble creation zone;
• and
• a unit to apply an external electrical field to the half-bubble creation zone.