Professor Kouji SEGAWA
|Area and Subject Taught||Quantum Functional Materials|
|Research Theme(s)||Experimental research on topological materials|
|Academic Degrees||Ph. D (Science)|
|Keywords for Research Field||Solid state physics, Topological insulators, Topological superconductors, Transport properties, Single crystals|
|Office Phone Number||Not Public|
The research field of Segawa laboratory is the experimental research on solid state physics. We cover a wide experimental activities, such as the material synthesis, measurement of basic physical properties, and development of research equipment. On the material synthesis, we grow single crystals by the melt-growth method with quartz-tube sealing and the flux method, and thin films by the sputtering method. At present we focus on topological insulators/superconductors, and we are ready to grow various materials depending on the research trends and/or students’ interest. The transport properties and magnetic properties can be measured at the temperature range from 1.5K to 500K, and at the magnetic fields up to 8 tesla.
Notable Publications and Works in the Last Three Years
- S. Yonezawa, K. Tajiri, S. Nakata, Y. Nagai, Z. Wang, K. Segawa, Y. Ando and Y. Maeno, “Thermodynamic evidence for nematic superconductivity in CuxBi2Se3”, Nat. Phys. 13, 123 (2017).
- K. Matano, M. Kriener, K. Segawa, Y. Ando and G.-Q. Zheng, “Spin-rotation symmetry breaking in the superconducting state of CuxBi2Se3”, Nat. Phys. 12, 852 (2016).
- Z. Wang, K. Segawa, S. Sasaki, A.A. Taskin and Y. Ando, “Ferromagnetism in Cr-doped topological insulator TlSbTe2”, APL Mater. 3 083302 (2015).
- K. Segawa, “Synthesis and Characterization of 3D Topological Insulators: a Case TlBi(S1-xSex)2”, Science and Technology of Advanced Materials 16 014405 (2015).
- K. Segawa, A.A. Taskin and Y. Ando, “Pb5Bi24Se41: A new Member of the Homologous Series Forming Topological Insulator Heterostructures”, J. Solid Stat. Chem. 221 196-201 (2015).
- Z. Wang, K. Segawa, S. Sasaki, A.A. Taskin and Y. Ando, “Ferromagnetism in Cr-doped topological insulator TlSbTe2”, APL Materials 3 - (2015).
- S. Sasaki, K. Segawa and Y. Ando, “Superconductor derived from a topological insulator heterostructure”, Phys. Rev. B 90 220504 (2014).