The computational approach using computers, which is called the third paradigm, is not only meeting the increasingly severe needs of society regarding materials, but is also enabling to provide seeds to society. In this laboratory, we have been developing new materials by utilizing computational materials science methods from atomic to macroscopic scales, and by organically connecting them with experiments and theories to construct new materials design strategies that are not confined to existing theories.
Our reseach topics is nano materials toward future electronics devices such as memory, storage and logic based on the high-quality thin film fabrication. Designing materials which do not exist naturally, fusion of electron chage and magnetism etc…, enjoy materials science in nano-world!
PoWe are investigating the internal structures in an atomic level, which determine properties of materials from metals to semiconductors and ceramics, in order to provide innovative technologies for produce new materials. In our laboratory not only pure scientific researches, but also applied and practical researches are carried out with a combination of positron annihilation experiments and theoretical calculations. The positron annihilation method makes it possible to non-destructively detect monovacancies and vacancy-solute atom complexes which are difficult to observe with a high-resolution electron microscope, as well as vacancy clusters and dislocations, nanoclusters, fine precipitates. In our laboratory, the results of positron annihilation experiments are combined with the results of first-principles computer simulations, and they generate a better understanding of relations between the internal structures and the properties of materials, leading to the development of new materials.
This research group is investigating the relationship between microstructures and material properties using advanced transmission electron microscopy and spectroscopy with nanometer and nanosecond scales. The research subjects include materials design by elucidating inhomogeneity such as lattice defects, low dimensional materials, metastable states formed by electronic excitations, and so on. We are conducting education and research aimed at elucidating universal common principles that approach the basis of materials science.
Positrons allow us to examine the atomic-scale internal structure of materials. We have examined the origin of excellent properties of metallic materials such as hydrogen storage alloys and aluminum alloys in automotive applications and ceramics materials such as perovskite-type metal oxides, by using positron annihilation spectroscopy and computer simulation in order to design new materials.
Top