Half-metallic YN₂ monolayer: dual spin filtering, dual spin diode and spin Seebeck effects

Abstract

Most of the pristine graphene-like two-dimensional materials have been found to be non-magnetic, and the emergence of magnetism usually needs an external electric field, substrate, strain, vacancy, or doping, which is not easily controlled in an experiment, limiting the potential applications in spintronics. Very recently, layered transition-metal dinitrides were explored experimentally and theoretically, and a pristine YN monolayer was predicted to be a half-metallic ferromagnet with a graphene-like structure. To demonstrate the possible spintronic applications, herein, we designed spintronic devices based on the half-metallic YN monolayer, and found perfect dual spin filtering and dual spin diode effects when a bias voltage was applied. Moreover, the devices also exhibited excellent spin Seebeck effects under a temperature gradient, which make the YN monolayer a promising candidate for both spintronic and spin caloritronic applications. These peculiar spin transport properties were analyzed and explained from the calculated spin-resolved band structure and transmission spectrum based on first-principles combined with the non-equilibrium Green's function method.

Computational Dissection of Two-Dimensional Rectangular Titanium Mononitride TiN: Auxetics and Promises for Photocatalysis

“…Motivated by the successful development of 2D TMDs, 2D transition metal borides and nitrides followed with rich structural complexity and fascinating physical and chemical properties, thus substantially expanding the family of 2D TM-based materials. Among these systems, TM binitrites (such as YN 2 , MoN 2 , ) exhibit various useful functionalities due to the unsaturated N-2p orbitals. For example, this may introduce intrinsic magnetic properties and high capacity as electrode materials for metal ion batteries.…”

Electrically Doped Nanoscale Devices Using First-Principle Approach: A Comprehensive Survey

“…The effect of incorporation of opposite polarities dopant atoms into the nanowire exhibits electrical properties like Zener diode [83]. The dual-spin filtering effect can be seen in the half-metallic yttrium nitrite YN 2 [84]. Investigation of heterostructure biomolecular FET can be observed using this electrical doping technique.…”

CrO2-based heterostructure and magnetic tunnel junction: perfect spin filtering effect, spin diode effect and high tunnel magnetoresistance

“…All these parameters are tested to be sufficient to obtain accurate results, and the present method has been successfully used in our previous works on spin transport properties of magnetic heterostructures and MTJs. 36,37 The spin-dependent current is calculated by the Landauer-Buttiker formula:…”