**O**ur group is studying theory of condensed matter physics. In many body systems, several interesting quantum phenomena like magnetism and superconductivity emerge owing to spontaneous symmetry breaking. We have been studying about theory of superconductivity and have achieved many important results in superconducting junction and mechanism of superconductivity.

In this decade, topological quantum phenomena becomes a hot topic stimulated by the discovery of quantum spin Hall effect. It is now a good time to explore physics of topological quantum phenomena. Our current research interest is topological superconductivity, topological insulator, topological crystalline insulator, Weyl semimetal, and exotic order in condensed matter.

## Research Topics

・Superconducting Junctions（Tunnel effet, Josephson effect, Proximity effect）

・Topological Superconductors

・Cold atom

・Skyrmion

・Topological Insulators

・Spintronics

・Symmetry of superconductivity

・Mechanism of Superconductivity

・Majorana Braiding Dynamics

・Atomic monolayers (Graphene, Silicene, Stanene)

・Dirac Semimetal, Weyl Semimetal