Dirac node ball semimetal and preparation and application method thereof

A technology of Dirac knots and semi-metals, applied in the coating process of metal materials, nanotechnology for materials and surface science, ion implantation plating, etc., can solve the complex and lengthy problems of discovering new Dirac materials, and achieve The effect of enriching knowledge and understanding, good repeatability and low cost

Active Publication Date: 2020-03-27
致真精密仪器(青岛)有限公司
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Problems solved by technology

[0006] Limited by the uncertainty of current experimental conditions, the discovery of new Dirac materials will be a complex and lengthy process

Method used

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  • Dirac node ball semimetal and preparation and application method thereof
  • Dirac node ball semimetal and preparation and application method thereof
  • Dirac node ball semimetal and preparation and application method thereof

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Embodiment 1

[0034] Example 1, this application uses theoretical simulation and calculation, through model construction and stability testing, energy band calculation and accurate fitting, and simulation analysis of topological characteristics, a new type of Dirac nodal spherical semimetal and its preparation are proposed method.

[0035] like figure 1 As shown, the crystal structure of the Dirac nodal semimetal is Cu in the ordered L12 phase 3 Au is the basic structure, and the group VB transition metal atoms X (Nb, Ta) and the V main group atoms Y (As, Sb, Bi) form a face-centered cubic structure (fcc) simulation material X 3 Y.

[0036] Among them, the atoms at the face center are transition metal atoms X of Group VB (such as Nb, Ta), and the atoms at the 8 vertices are the atoms of Group V main group Y (such as As, Sb, Bi).

[0037] The above-mentioned X composed of transition metal atom X of group VB and atom Y of main group V 3 Y alloy material, which belongs to a new type of Dira...

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Abstract

The invention provides a Dirac node ball semimetal and a preparation and application method thereof. The Dirac node ball semimetal is formed by an X3Y alloy material consisting of a VB group transition metal atom X and a V main group atom Y, has a drum-like topological surface state, a Dirac point in a three-dimensional momentum space forms a spherical shell shape, and the alloy material has a large SHC so as to provide theoretical basis and guidance for subsequent functional nano device (such as a spin storage device SOT-MRAM and a magnetic sensor) experiments. The crystal structure of the Dirac node ball semimetal is based on Cu3Au of an ordered L12 phase, and a face-centered cubic structure (fcc) simulation material X3Y is formed by the VB group transition metal atom X and the V group main group atom Y. The atoms at the face center are the VB group transition metal atoms X (e.g., Nb, Ta), and the atoms at eight vertices are V main group atoms Y (e.g., As, Sb, Bi).

Description

technical field [0001] The invention proposes a novel Dirac nodal spherical semimetal, and realizes its preparation and analysis process in combination with simulation design and application analysis, belonging to the field of metal compound materials. Background technique [0002] With the rapid growth of high-speed computing power and storage demand, cutting-edge semiconductor industries such as memory chips have attracted great attention. Among them, magnetoresistive random access memory (MRAM) has gradually become a key project jointly developed by both industry and academia because of its low power consumption and fast writing speed. The first three generations of MRAMs all faced the problem of low magnetic moment inversion efficiency. The SOT-MRAM based on the spin-orbit torque (SOT) of the spin-orbit coupling interaction can achieve efficient electric field manipulation and flip the ferromagnetic layer moment, resulting in a very large Spin Hall conductance (SHC). A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/35C23C14/16B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C23C14/165C23C14/352
Inventor 侯文杰张学莹赵巍胜聂天晓
Owner 致真精密仪器(青岛)有限公司
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