Thermoelectrics are an important class of materials with great potential in alternative energy applications. In this study, two-dimensional (2D) nanoplates the layered chalcogenides, Sb2Te3 and Bi2Te3, synthesized composites two investigated for their thermoelectric properties. The materials, were as hexagonal, 2D via a colloidal polyol route. as-synthesized Bi2Te3 vary drastically from one ano...

The magnetic structures of MnBi2Te4(Bi2Te3)n can be manipulated by tuning the interlayer coupling via number Bi2Te3 spacer layers n, while intralayer ferromagnetic (FM) exchange is considered too robust to control. By applying hydrostatic pressure up 3.5 GPa, we discover opposite responses properties for n = 1 and 2. MnBi4Te7 stays at A-type antiferromagnetic (AFM) phase with a decreasing N\'ee...

Magnetic topological insulators MnBi2Te4 and Bi2Te3/MnBi2Te4 have attracted extensive attention because of their novel physical properties promising application potentials. In this work, based on the dataset from density functional calculations, a deep neural network potential is trained to study thermal transport Bi2Te3/MnBi2Te4. The conductivity first calculated using equilibrium molecular dy...

Mixture of thermoelectric Bi2Te3 and ferromagnetic Ni powders was spark-plasma-sintered to prepare bulk composites with different content (0.5 1.25 at.%). Hexagonal Bi2Te3, cubic trigonal NiTe2 phases coexist in the composites. The phase forms matrix composite, whereas corresponds filler. filler is formed by [email protected]2 (“core-shell”) inclusions. Forming “core-shell” inclusions due high-...

It is challenging to grow an epitaxial 4-fold compound superconductor (SC) on a 6-fold topological insulator (TI) platform due the stringent lattice-matching requirement. Here, we demonstrate that Fe(Te,Se) can epitaxially TI (Bi2Te3) layer accidental, uniaxial lattice match, which dubbed as “hybrid symmetry epitaxy”. This new growth mode critical stabilizing robust superconductivity with TC hi...

Significant efforts have been paid to exploring the fundamental properties of topological insulators (TIs) in recent years. However, the investigation of TIs as functional materials for practical device applications is still quite limited. In this work, electronic sensors based on Bi2Te3 nanoplates were fabricated and the sensing performance was investigated. On exposure to different surroundin...