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CN-121990580-A - Superconducting material of metal intercalation boron carbon

CN121990580ACN 121990580 ACN121990580 ACN 121990580ACN-121990580-A

Abstract

The invention discloses a metal intercalation boron carbon superconducting material GeB 2 C 2 under normal pressure. The material has a two-dimensional Kagome lattice structure, the space group is P6/mmm (No. 191), the lattice constant a=b=2.732A, and c= 16.784A. The material has a superconducting transition temperature of about 48K under normal pressure (0 GPa) conditions and is kinetically stable as predicted by first principle calculations. The superconducting mechanism is derived from the strong electroacoustic coupling effect, and the coupling constant lambda is about 1.64. The material consists of Ge, B and C elements with abundant contents in the crust, has the advantages of readily available raw materials and low cost, and has large-scale preparation potential. Compared with the traditional normal pressure superconducting material, the material has higher superconducting transition temperature, does not need a high-pressure environment, and obviously reduces the preparation and application threshold. The material can be applied to the fields of high-performance superconducting filters, superconducting nanowire single photon detectors, small superconducting magnets and the like, and has important scientific research value and good practical application prospect.

Inventors

  • HUANG YU
  • DONG HUAFENG
  • PENG JUNHAO

Assignees

  • 广东工业大学

Dates

Publication Date
20260508
Application Date
20260205

Claims (7)

  1. 1. A superconducting material obtained through calculation and prediction of a first sex principle is characterized in that a novel superconducting material with a chemical formula of GeB 2 C 2 and a metal intercalated in a two-dimensional Kagome boron carbon lattice is dynamically stable under normal pressure and has superconducting characteristics.
  2. 2. The metallic intercalation boron carbon superconducting material according to claim 1, wherein the material has crystal structure parameters of: space group 191 (P6/mmm) Lattice constant a=b=2.732 a, c= 16.784 a Unit cell angle: α=β=90°, γ=120°.
  3. 3. The metallic-intercalated boron-carbon superconducting material of claim 2 wherein the atomic occupation space coordinates of the material are: Ge is located (-0.26667, -0.53333, 0.50000) B1 is located (0.40001, 0.80000, 0.36426) B2 is located (0.40001, 0.80000, 0.63574) C1 is located (0.73332, 0.46666, 0.36965) C2 is located (0.73332, 0.46666, 0.63035).
  4. 4. A metal-intercalated boron-carbon superconducting material as claimed in any one of claims 1-3 wherein the superconducting transition temperature T c of said material is about 48K.
  5. 5. Use of a metal-intercalated boron-carbon superconducting material according to any one of claims 1-4 for the preparation of a superconducting device.
  6. 6. The use according to claim 5, wherein the superconducting device comprises a superconducting single photon detector, a superconducting voltage reference device, a superconducting magnetic levitation system, a superconducting radio frequency cavity, a superconducting transition edge sensor, a superconducting energy storage device or a superconducting quantum interferometer.
  7. 7. Use of a metal-intercalated boron-carbon superconducting material as claimed in any one of claims 1-6 in electronic devices having an operating temperature of 48K and below.

Description

Superconducting material of metal intercalation boron carbon Technical Field The invention relates to the technical field of superconducting materials, in particular to a metal intercalation boron carbon superconducting material with superconducting characteristics under normal pressure (0 GPa), the chemical formula of which is GeB 2C2, the material is obtained through calculation and prediction by a first sexual principle, has a superconducting transition temperature of 48K, and belongs to novel high-temperature superconducting materials. Background The superconducting material has wide application prospect in the fields of power transmission, magnetic suspension traffic, magnetic resonance imaging, quantum communication and the like due to the unique properties of zero resistance, complete diamagnetism and the like. Since 1911 the phenomenon of superconductivity was found, it is always the core direction of research in the field to obtain a superconducting material with a higher superconducting transition temperature (T c) and a lower operating pressure. In recent years, a metal intercalation superconductor has been attracting attention. In 2023, the superconducting transition temperature of 18.9K is realized by the calcium atom intercalation double-layer graphene (C 2CaC2) under normal pressure, and in 2024, the superconducting transition temperature of the calcium atom intercalation double-layer graphene (Si 2CaSi2) under normal pressure is about 12.5K. It is worth noting that many classical superconducting materials are successfully synthesized by experiments after calculation and prediction by the first principles, which fully proves the important guiding role of theoretical calculation in superconducting material research and development. Although the intercalated compound can realize superconductivity under normal pressure, the superconductivity transition temperature is usually lower than 40K, and the requirement of practical application on high-temperature superconductivity can not be met. This presents a difficult surprise for its practical deployment and device integration. First principles calculations are an effective way to predict new superconducting materials. Based on Density Functional Theory (DFT) and electroacoustic coupling theory, the crystal structure, electronic property and superconducting property of the material can be predicted before synthesis, and theoretical support is provided for experimental work. Therefore, developing a superconducting material with higher superconducting transition temperature under normal pressure has important scientific significance and practical application value for pushing the superconducting technology to practical application. Disclosure of Invention The invention aims to overcome the limitation of the prior art and provides a novel two-dimensional Kagome lattice metal intercalation boron-carbon superconducting material GeB 2C2. The material is calculated and predicted by a first sexual principle, can realize superconducting transition temperature of about 48K under normal pressure, effectively avoids the requirement of high-pressure environment, and has higher T c and good practical prospect. In order to achieve the above purpose, the present invention provides the following technical solutions: The chemical formula of the superconducting material of the metal intercalation boron carbon is GeB 2C2, and the crystal structure parameters are as follows: Space group 191 (P6/mmm, hexagonal system) Lattice constant a=b=2.732 a, c= 16.784 a Unit cell angle α=β=90°, γ=120° Atomic coordinates (fractional coordinates): Ge: (-0.26667, -0.53333, 0.50000) B1: (0.40001, 0.80000, 0.36426) B2: (0.40001, 0.80000, 0.63574) C1: (0.73332, 0.46666, 0.36965) C2: (0.73332, 0.46666, 0.63035) Advantageous effects Compared with the prior art, the invention has the following remarkable advantages: 1. The material presents a superconducting state under normal pressure, avoids complex equipment required by high-pressure synthesis and operation, greatly reduces preparation and application cost, and improves practical potential; 2. In normal pressure superconducting materials, the superconducting transition temperature of 48K is at a higher level, which is superior to that of traditional BCS superconductors, such as MgB 2 (39K); 3. the two-dimensional Kagome layered structure is dynamically stable under normal pressure; 4. the material consists of three elements of Ge, B and C, the content of the elements in the crust is relatively rich, the raw materials are easy to obtain, the cost is low, and the feasibility of large-scale preparation is realized; 5. Based on the first principle calculation, the material has a clear electronic structure, a superconducting mechanism is clear, and an accurate and reliable direction is provided for experimental synthesis; 6. Can be applied to the fields of high-performance superconducting filters, superconducting Nanowire Single Photon Detect