Department of Physics, Graduate School of Science and Faculty of Science, Tohoku University

The Topological Materials Exploration Group, established in October 2025, offers a fresh research environment in which students can begin their research together with newly appointed staff.

In recent years, the concept of topology, which originates from mathematics, has become increasingly important in condensed matter physics. When electronic wave functions in solids acquire a “twisted” feature due to hybridisation arising from relativistic effects or strong interactions, they can exhibit nontrivial topology, analogous to a Moebius strip. In such topological materials, electronic states are characterised by quasi-particles that obey the same equations of motion as Dirac or Majorana fermions. These relativistic quasi-particles are robust against external perturbations and exhibit novel transport phenomena, making topological materials promising candidates for applications in electronics and quantum technologies.
Our group explores a wide range of topological materials, from alloys to oxides. Using various synthesis techniques-including high-temperature solution, chemical vapour transport, and high-pressure synthesis-we aim to grow high-quality single crystals. To uncover their unknown physical properties, we also carry out a wide range of measurements under extreme conditions such as high magnetic fields, low temperatures, and high pressures. By tightly integrating materials synthesis and physical characterisation, we seek to advance new frontiers in condensed matter physics.

A major feature of our group is the opportunity to engage in interdisciplinary research spanning the boundary between chemistry and physics. Students will have frequent opportunities to visit domestic and international research institutes and to participate in collaborative research projects. Through experience in diverse research environments, students can broaden their perspectives and further develop their scientific interests and skills.