Structure and Properties of Low Dimensional FeTe Nano Materials under High Pressure

Abstract

Materials are very important to human society. As a new type of nano materials, new alloy nano materials show unique mechanical, optical, magnetic and other properties, and have great application potential. It has broad application prospects in the next generation of electronic devices, energy storage devices and spin electronics devices. Based on the above background, the purpose of this paper is to study the structure and properties of low dimensional FeTe nanomaterials under high pressure. In this paper, the density functional theory (DFT) calculation is used to study the geometric structure, electronic properties, optical properties and room temperature Pang oxygen ion conductivity of FeTe nanomaterials. In this paper, high quality heterojunctions have been grown on SrTiO3 substrate by molecular beam epitaxy, and the physical properties that may affect the formation of superconductors, such as growth process, electronic structure and charge transfer, have been systematically characterized. The experimental results show that the arrangement of atomic structure and the ratio of chemical elements in the structure are studied by means of reflection high-energy electron diffractometer and transmission electron microscope. In addition, the superconductivity of the sample is tested by transport experiment. It is found that there is a superconductivity phenomenon with a critical temperature of about 12 K in the sample.

Keywords:

• High pressure and low dimension
• nano materials
• structural refinement
• density functional theory
• superconducting materials

Additional information

Funding

This work was supported by Natural Science Foundation of Shan Province (No.201801D221035), Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi (No. 2019L0551) and Science Foundation of North University of China (No. XJJ201820 and XJJ201827)