Predictable Gate-Field Control of Spin in Altermagnets with Spin-Layer Coupling

Spintronics, a technology harnessing electron spin for information transmission, offers a promising avenue to surpass the limitations of conventional electronic devices. While the spin directly interacts with the magnetic field, its control through the electric field is generally more practical, and has become a focal point in the field. Here, we propose a mechanism to realize static and almost uniform effective magnetic field by gate-electric field. Our method employs two-dimensional altermagnets with valley-mediated spin-layer coupling (SLC), in which electronic states display valley-contrasted spin and layer polarization. For the low-energy valley electrons, a uniform gate field is approximately identical…

• NN
  National Natural Science Foundation of China

  Awards: 12321004, 12234003, 12004035, 12347214, 12304188
• BI
  Beijing Institute of Technology Research Fund Program for Young Scholars
• NK
  National Key Research and Development Program of China

  Award: 2020YFA0308800