Novel transition metal telluride with adjustable superconductivity and charge density wave and preparation method thereof

A technology of superconductivity and charge density, applied in the direction of metal selenide/telluride, selenium/telluride compound, chemical instruments and methods, etc., can solve the problem of low superconducting temperature, achieve Tc improvement, uniform distribution, and easy storage Effect

Pending Publication Date: 2021-08-20
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although important progress has been made in the exploration and research of transition metal sulfide superconducting materials, many problems in this system are still to be solved, such as the superconducting temperature is generally low (the transition temperature of most transition metal layered sulfide superconductors is between 2K), the formation mechanism of charge density waves and the competitive relationship between superconductivity, etc.

Method used

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  • Novel transition metal telluride with adjustable superconductivity and charge density wave and preparation method thereof
  • Novel transition metal telluride with adjustable superconductivity and charge density wave and preparation method thereof
  • Novel transition metal telluride with adjustable superconductivity and charge density wave and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Accurately weigh 0.0198g Cu, 0.1186g Ir, 0.1607g Te and 0.009g Au raw materials, place them in a quartz tube after fully grinding, and pump the quartz tube containing the fully ground raw materials to a vacuum degree of 1×10 -5 Torr, and seal the tube with an acetylene flame; then place the sealed quartz tube in a box furnace at 850°C for 120 hours of calcination, then open the quartz tube, fully grind the obtained powder and press it into tablets; Put it in the quartz tube again, and evacuate the quartz tube to a vacuum of 1×10 - 5 Torr, and seal the tube with an acetylene flame; then place the sealed quartz tube in a box furnace at 800 °C for 240 h to obtain CuIr 1.985 Au 0.015 Te 4 Sample; then use X-ray powder diffraction (PXRD) to determine the purity of the sample; finally, the physical properties of the obtained polycrystalline sample material will be tested by the Physical Comprehensive Testing System (PPMS): mainly including electrical conductivity, magnetic...

Embodiment 2

[0030] Accurately weigh 0.0198g Cu, 0.1165g Ir, 0.1607g Te and 0.0031g Au raw materials, place them in a quartz tube after fully grinding, and pump the quartz tube containing the fully ground raw materials to a vacuum degree of 1×10 -5 Torr, and seal the tube with an acetylene flame; then place the sealed quartz tube in a box furnace at 850°C for 120 hours of calcination, then open the quartz tube, fully grind the obtained powder and press it into tablets; Put it in the quartz tube again, and evacuate the quartz tube to a vacuum of 1×10 - 5 Torr, and seal the tube with an acetylene flame; then place the sealed quartz tube in a box furnace at 800 °C for 240 h to obtain CuIr 1.95 Au 0.05 Te 4Sample; then use X-ray powder diffraction (PXRD) to determine the purity of the sample; finally, the physical properties of the obtained polycrystalline sample material will be tested by the Physical Comprehensive Testing System (PPMS): mainly including electrical conductivity, magnetic s...

Embodiment 3

[0032] Accurately weigh 0.0198g Cu, 0.1135g Ir, 0.1606g Te and 0.0061g Au raw materials, place them in a quartz tube after fully grinding, and pump the quartz tube containing the fully ground raw materials to a vacuum degree of 1×10 -5 Torr, and seal the tube with an acetylene flame; then place the sealed quartz tube in a box furnace at 850°C for 120 hours of calcination, then open the quartz tube, fully grind the obtained powder and press it into tablets; Put it in the quartz tube again, and evacuate the quartz tube to a vacuum of 1×10 - 5 Torr, and seal the tube with an acetylene flame; then place the sealed quartz tube in a box furnace at 800 °C for 240 h to obtain CuIr 1.9 Au 0.1 Te 4 Sample; then use X-ray powder diffraction (PXRD) to determine the purity of the sample; finally, the physical properties of the obtained polycrystalline sample material will be tested by the Physical Comprehensive Testing System (PPMS): mainly including electrical conductivity, magnetic su...

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Abstract

The invention designs a series of quantum materials with a chemical general formula of CuIr2-xAuxTe4 (x is greater than or equal to 0 and less than or equal to 0.2) and a preparation method thereof, and belongs to the technical field of quantum functional material manufacturing. The preparation method is a traditional high-temperature solid-phase method and comprises the following steps: fully grinding and mixing Cu, Ir, Au and Te powder according to corresponding stoichiometric ratios, vacuumizing and sealing in a quartz tube, putting the sealed vacuum quartz tube filled with raw materials into a furnace, and sintering at 850 DEG C for 120 hours to obtain CuIr2-xAuxTe4 (x is greater than or equal to 0 and less than or equal to 0.2) polycrystalline powder. Physical properties such as conductivity, magnetic property, upper and lower critical fields and the like are measured through a comprehensive physical property test system (PPMS), basic properties of superconductivity and charge density wave phase change of a target product are deeply discussed, and a relational graph of specific doping concentration and respective superconductivity and charge density wave phase change is established. And the crystal structure of the target product is analyzed through XRD data fitting. With the compound superconducting material synthesized, a new member is added for the family of transition metal telluride superconducting materials.

Description

technical field [0001] The invention belongs to the technical field of manufacturing quantum functional materials, and specifically relates to a series of chemical general formula CuIr 2-x Au x Te 4 (0≤x≤0.2) novel transition metal tellurides with abundant quantum states and methods for their preparation. Background technique [0002] Superconductivity is one of the most fascinating macroscopic quantum phenomena in physics. Superconducting materials refer to materials that exhibit zero resistance and repel magnetic force lines under certain temperature conditions (generally lower temperatures). The peculiar properties of perfect diamagnetism and flux quantization. However, there is still a long way to go for the exploration of room temperature superconductors and superconducting mechanisms. There are usually numerous and complex competing quantum states and structural orders in high-temperature superconductors, and various quantum states and structural orders influence e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B19/00
CPCC01B19/007C01P2002/72C01P2006/40C01P2006/42
Inventor 罗惠霞曾令勇佳玛何溢懿
Owner SUN YAT SEN UNIV
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