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Gd adsorption graphene nanobelt system with Rashba effect

A graphene nanoribbon and graphene technology, applied in the field of spintronics, can solve the problems of the possibility of material selection and the limitation of crystal growth technology

Active Publication Date: 2020-08-14
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Note that when looking for a one-dimensional system with the Rashba effect, many experimental objects are heavy element nanomaterials, which limits the possibility of material selection and crystal growth technology

Method used

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  • Gd adsorption graphene nanobelt system with Rashba effect
  • Gd adsorption graphene nanobelt system with Rashba effect
  • Gd adsorption graphene nanobelt system with Rashba effect

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Embodiment Construction

[0040] In order to make the technical purpose, technical solution and beneficial effect of the present invention clearer, the technical solution of the present invention will be further described below in conjunction with the drawings and specific embodiments.

[0041] A Gd adsorption graphene nanoribbon system with Rashba effect is designed by the following method:

[0042] (1) Construct the graphene periodic cell in the Materials Studio software. The graphene cell contains 2 carbon atoms, and then the graphene cell is expanded along the x, y and z directions to construct the graphene cell. 4×4×1 graphene unit cell;

[0043] (2) Use the density functional theory that can be realized by the VASP software package to perform calculations. The exchange-correlation functional uses the GGA-PBE functional; the interaction between electrons and ions is described by the method of projection plus wave, and the plane wave cut-off energy is set to 450eV , the valence electron of Gd elem...

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Abstract

According to the invention, a first principle method based on a density functional theory is adopted and a Gd adsorption graphene nanobelt system with a spontaneous Rashba effect is designed. The stable geometric structure and adsorption energy are calculated and analyzed, an electronic structure and Rashba intensity calculation and analysis method and the like are provided, and a theoretical basis and guidance are laid for developing a novel one-dimensional Rashba nano system. In the designed Gd-ZGNR system, the growth technology of the sawtooth-shaped graphene nanobelt is mature and easy togrow and control, and the Rashba effect in the one-dimensional system can be spontaneously achieved only through adsorption of an external heavy element Gd.

Description

technical field [0001] The invention belongs to the technical field of spin electronics, and in particular relates to a Gd-adsorbed graphene nanoribbon system with a spontaneous Rashba effect. Background technique [0002] The excellent mechanical and electrical properties of graphene have attracted the attention of various scientific fields. In particular, people can control the electron spin of graphene-based magnetic materials through the spin-orbit coupling property, which has become one of the most important research hotspots in current magnetic storage and spintronic applications. In practical applications, graphene nanoribbons of finite width are unavoidable, which can be obtained by direct mechanical cleavage of graphene or patterned epitaxial growth on graphene, which can be zigzag (ZGNR) or handrail Chair-shaped (AGNR) graphene nanoribbons. Among them, ZGNRs have attracted great interest because of their uniquely opposite spin-polarized edge states. In recent ye...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F111/14
CPCG06F30/20G06F2111/14
Inventor 秦真真秦光照邵斌左旭
Owner ZHENGZHOU UNIV