SiN-SiC nanofilm: A nano-functional ceramic with bipolar magnetic semiconducting character

Abstract

Nowadays, functional ceramics have been largely explored for application in various fields. However, magnetic functional ceramics for spintronics remain little studied. Here, we propose a nano-functional ceramic of sphalerite SiN-SiC nanofilm with intrinsic ferromagnetic order. Based on first principles calculations, the SiN-SiC nanofilm is found to be a ferromagnetic semiconductor with an indirect band gap of 1.71 eV. By mean field theory, the Curie temperature is estimated to be 304 K, close to room temperature. Furthermore, the valence band and conduction band states of the nanofilm exhibit inverse spin-polarization around the Fermi level. Thus, the SiN-SiC nanofilm is a typical bipolar magnetic semiconductor in which completely spin-polarized currents with reversible spin polarization can be created and controlled by applying a gate voltage. Such a nano-functional ceramic provides a possible route for electrical manipulation of carrier's spin orientation.

B4CN3and B3CN4monolayers as the promising candidates for metal-free spintronic materials

“…To gain more insights about the magnetism of B 4 According to the mean-field theory [10], the T C can be estimated by…”

“…In BMS, both spin channels are semiconducting and possess opposite spin polarization when approaching the Fermi level. Therefore, BMSs can provide completely spin polarized currents with tunable spin polarization simply by carrier doping [6][7][8][9][10] or external field [7]. For the applications in nanoscale integrated circuits, low-dimensional spintronic materials with high Curie temperature (T C ) are much more desirable [11][12][13][14][15].…”

Ab initio study of magnetism in nonmagnetic metal substituted monolayer MoS2

“…Therefore, completely spin-polarized currents with reversible spin polarization can be created and controlled simply by applying a gate voltage. Although a great effort has been made to theoretically design such materials [4][5][6], report about their synthesis is still unavailable. It is still a big challenge to find more new BMS materials.…”

Bipolar Magnetic Materials Based on 2D Ni[TCNE] Metal–Organic Coordination Networks

“…Additionally, bipolar half-metals (BHMs), the analogues of BMS, can also switch spin-polarized directions to obtain single spin currents by tuning the proper gate voltage. [6] To date, only small species of BMSs have been theoretically predicted, including 1D carbon nitride, [7] graphene flake-doped boron nitride nanotubes, [8] silicene nanoribbons, [9] and 2D wurtzite SiC, [10] MnPSe 3 , [11] SiN-SiC [12] as well as functionalized BAs nanosheets. [13] However, these BMSs are all based on inorganic materials and still remain challenges in the experimental observations.Recently 2D metal-organic coordination networks (MOCNs) have attracted increasing attention due to the feasibility of onsurface self-assembly synthetic techniques and flexibility of selecting metals and organic ligands, thus giving rise to the potential applications in magnetism, catalysis, surface patterning, and host-guest chemistry.…”