Classification and Prediction of Skyrmion Material Based on Machine Learning.

The discovery and study of skyrmion materials play an important role in basic frontier physics research and future information technology. The database of 196 materials, including 64 skyrmions, was established and predicted based on machine learning. A variety of intrinsic features are classified to optimize the model, and more than a dozen methods had been used to estimate the existence of skyrmion in magnetic materials, such as support vector machines, -nearest neighbor, and ensembles of trees.

Dramatically enhanced Seebeck coefficient in GeMnTe-NaBiTe alloys by tuning the Spin's thermodynamic entropy.

The emerging material GeMnTe provides a rare example to study the spin degree of freedom in thermoelectric transport, as it exhibits an anomalous Seebeck coefficient driven by the spin's thermodynamic entropy. This work presents an unconventional strategy to optimize the thermoelectric performance of GeMnTe by manipulating the spin degree of freedom. NaBiTe is alloyed into GeMnTe to disorder the spin orientation under finite temperature, and the obtained Seebeck coefficient is confirmed to be dramatically enhanced by more than 150%.

Anomalous Thermopower and High in GeMnTe Driven by Spin's Thermodynamic Entropy.

Na CoO was known 20 years ago as a unique example in which spin entropy dominates the thermoelectric behavior. Hitherto, however, little has been learned about how to manipulate the spin degree of freedom in thermoelectrics. Here, we report the enhanced thermoelectric performance of GeMnTe by controlling the spin's thermodynamic entropy.

Understanding the effect of thickness on the thermoelectric properties of CaCoO thin films.

We are reporting the effect of thickness on the Seebeck coefficient, electrical conductivity and power factor of CaCoO thin films grown on single-crystal Sapphire (0001) substrate. Pulsed laser deposition (PLD) technique was employed to deposit CaCoO films with precisely controlled thickness values ranging from 15 to 75 nm. Structural characterization performed by scanning electron microscopy (SEM) and atomic force microscopy (AFM) showed that the growth of CaCoO on Sapphire (0001) follows the island growth-mode.

Enhanced Thermoelectric Properties of p-Type BiSbTe/SbTe Composite.

Constructing a nanocomposite to introduce a coherent interface is an effective way to improve the property of thermoelectric material. Here, a series composites of BiSbTe- wt % SbTe ( = 0, 0.3, 0.

Phonon Engineering for Thermoelectric Enhancement of p-Type Bismuth Telluride by a Hot-Pressing Texture Method.

Phonon engineering is a core stratagem to improve the thermoelectric performance, and multi-scale defects are expected to scatter a broad range of phonons and compress the lattice thermal conductivity. Here, we demonstrate obviously enhanced thermoelectric properties in BiSbTe alloy by a hot-pressing texture method along the axial direction of a zone-melted ingot. It is found that a plastic deformation of grain refinement and rearrangement occurs during the textured pressing process.

Terbium Ion Doping in CaCoO: A Step towards High-Performance Thermoelectric Materials.

The potential of thermoelectric materials to generate electricity from the waste heat can play a key role in achieving a global sustainable energy future. In order to proceed in this direction, it is essential to have thermoelectric materials that are environmentally friendly and exhibit high figure of merit, ZT. Oxide thermoelectric materials are considered ideal for such applications.