title: Spin caloritronics of blue phosphorene nanoribbons.
abstract: We report a first-principles study of the magnetic properties and spin caloritronics of zigzag-type blue phosphorene nanoribbons (zBPNRs). It is found that the bare zBPNR (0H-zBPNR) or monohydrogenated zBPNR (1H-zBPNR) exhibit spin-semiconducting properties arising from the edge electronic states. We further confirm that the py orbitals of the edge P atoms have the main contributions to these states. The spin-semiconducting property has a natural advantage for fabricating perfect thermospin devices with a stronger spin Seebeck effect than charge Seebeck effect at the Fermi level. When a temperature difference is applied, the electric current with the different spin index displays a bipolar behavior, and the spin-filtering efficiency can reach 1200%. By changing the widths of 0H-zBPNR and 1H-zBPNR, the ratio of the spin Seebeck coefficient to the charge Seebeck coefficient at the Fermi level is about 10 at room temperature.
authors: College of Physics and Engineering, Changshu Institute of Technology and Jiangsu Laboratory of Advanced Functional materials, Changshu 215500, China. xflucky@mail.sitp.ac.cn fengjinfu@cslg.edu.cn.
authors: Y S
authors: YS
authors: Liu
authors: X
authors: X
authors: Zhang
authors: X F
authors: XF
authors: Yang
authors: X K
authors: XK
authors: Hong
authors: J F
authors: JF
authors: Feng
authors: M S
authors: MS
authors: Si
authors: X F
authors: XF
authors: Wang