光照磷烯纳米带的自旋输运理论研究

Spin Transport in an Irradiated Phosphorene Nanoribbon

我们理论研究了单层黑磷纳米带在光照下形成的弗洛凯态能带以及对自旋输运的影响。我们发现,在圆极化光作用下,单层黑磷纳米带的弗洛凯态会打开能隙,从而导致电导被极大压制,铁磁衬底的引入会造成体态能带以及准平带的劈裂行为。费米能的改变可以用来调节系统的自旋极化,这些现象为我们利用光学手段控制和调节黑磷等二维材料的自旋输运提供了新的可能性。

We theoretically study the light-induced Floquet states of phosphorene nanoribbon and their influences on spin transport.We find that phosphorene nanoribbon opens new energy gaps and the conductivities are suppressed under circularly polarized light.The introduction of ferromagnetic substrates will induce splitting in both bulk and quasi-flat bands.Fermi energy can be used to tune the spin polarization.These phenomena pave the way to optical control of spin transport of two-dimensional materials such as phosphorene.