One-Dimensional Magnetic Order Stabilized in Edge-Reconstructed MoS2 Nanoribbon via Bias Voltage.

Low-dimensional nanostructures are expected to play an important role in spintronics. However, in low-dimensional systems, thermal fluctuations become more significant, which makes long-range magnetic ordering thermodynamically unfavorable. For example, as predicted by the Ising model, 1D magnetic order cannot survive, even at an arbitrary low finite temperature. In this study, utilizing a nanoproximity effect, we design a MoS2 nanoribbon material to stabilize 1D magnetic order without requiring the explicit application of an external magnetic field. The designed MoS2 nanoribbon has a new edge-reconstruction pattern, which is much more stable than previously reported structures. As a novel electronic property, one edge is nonmagnetic but conductive, and the opposite edge contains a magnetic moment in the predicted reconstruction pattern. Therefore, a bias voltage can drive a current along the former edge, which then generates a magnetic field at the opposite edge to stabilize the 1D magnetic order there. This result opens a new avenue to realize the integrated electrical control of magnetism.