Geometry-Induced Spin Polarization in Altermagnets
Analysis
This paper explores a novel mechanism for generating spin polarization in altermagnets, materials with potential for spintronic applications. The key finding is that the geometry of a rectangular altermagnetic sample can induce a net spin polarization, even though the material itself has zero net magnetization. This is a significant result because it offers a new way to control spin in these materials, potentially leading to new spintronic device designs. The paper provides both theoretical analysis and proposes experimental methods to verify the effect.
Key Takeaways
- •Geometry can induce spin polarization in altermagnets.
- •This effect is specific to rectangular samples with unequal dimensions.
- •The spin polarization can be probed through transport measurements.
- •The findings suggest a new route for designing mesoscopic spintronic devices.
Reference
“Rectangular samples with $L_x eq L_y$ host a finite spin polarization, which vanishes in the symmetric limit $L_x=L_y$ and in the thermodynamic limit.”