Strong-Correlation Materials Research Team
Team Leader
Yasujiro TAGUCHI (D.Eng.)
Strong correlation of electrons in oxides often leads to an insulating state accompanied by charge ordering/localization, or an anomalous metallic state on the verge of transition to an insulator. In these systems, charge/spin/orbital degrees of freedom of electrons and lattice degree of freedom strongly couple with each other, producing various intriguing phenomena. Focusing on these strongly correlated electron systems, we aim to explore novel materials that exhibit magnetoelectric, thermoelectric, magenetocaloric response. In addition, we try to make these responses gigantic, and pursue the possibility of applying these materials to spintronics devices, thermoelectric power generator, and magnetic refrigeration technology.
- Exploration of gigantic magnetoelectric response and cross control
- Magnetotransport phenomena in non-trivial spin texture
- Charge-spin-orbital-lattice coupled system
- Exploration of novel thermoelectric materials
- Exploration of novel magnetocaloric materials
- H. Sakai, J. Fujioka, T. Fukuda, D. Okuyama, D. Hashizume, F. Kagawa, H. Nakao, Y. Murakami, T. Arima, A. Q. R. Baron, Y. Taguchi, and Y. Tokura.:
"Displacement-Type Ferroelectricity with Off-Center Magnetic Ions in Perovskite Sr1-xBaxMnO3"
Phys. Rev. Lett. 107, 137601 (2011). - K. Shibuya, D. Okuyama, R. Kumai, Y. Yamasaki, H. Nakao, Y. Murakami, Y. Taguchi, T. Arima, M. Kawasaki, and Y. Tokura.:
"X-ray induced insulator-metal transition in a thin film of electron-doped VO2"
Phys. Rev. B 84, 165108 (2011) - Y. Tokunaga, D. Okuyama, T. Kurumaji, T. Arima, H. Nakao, Y. Murakami, Y. Taguchi, and Y. Tokura.:
"Multiferroicity in NiBr2 with long-wavelength cycloidal spin structure on a triangular lattice"
Phys. Rev. B 84, 060406 (2011) - Y. Ishida, H. Kanto, A. Kikkawa, Y. Taguchi, Y. Ito, Y. Ota, K. Okazaki, W. Malaeb, M. Mulazzi, M. Okawa, S. Watanabe, C.-T. Chen, M. Kim, C. Bell, Y. Kozuka, H. Y. Hwang, Y. Tokura, and S. Shin.:
"Common Origin of the Circular-Dichroism Pattern in Angle-Resolved Photoemission Spectroscopy of SrTiO3 and CuxBi2Se3"
Phys. Rev. Lett. 107, 077601 (2011) - D. Okuyama, S. Ishiwata, Y. Takahashi, K. Yamauchi, S. Picozzi, K. Sugimoto, H. Sakai, M. Takata, R. Shimano, Y. Taguchi, T. Arima, and Y. Tokura.:
"Magnetically driven ferroelectric atomic displacements in orthorhombic YMnO3"
Phys. Rev. B 84, 054440 (2011) - S. Ishiwata, M. Tokunaga, Y. Kaneko, D. Okuyama, Y. Tokunaga, S. Wakimoto, K. Kakurai, T. Arima, Y. Taguchi, and Y. Tokura.:
"Versatile helimagnetic phases under magnetic fields in cubic perovskite SrFeO3"
Phys. Rev. B 84, 054427 (2011) - N. Kida, S. Kumakura, S. Ishiwata, Y. Taguchi, and Y. Tokura.:
"Gigantic terahertz magnetochromism via electromagnons in the hexaferrite magnet Ba2Mg2Fe12O22"
Physica Reivew B, 2011, Vol. 83, 064422 (2011) - T. Suzuki, M. S. Bahramy, R. Arita, Y. Taguchi, and Y. Tokura.:
"Doping control and thermoelectric properties of R1-xAxZnSbO(R=La, Ce; A=Ca, Sr)"
Physica Reivew B, January 2011, Vol. 83, 035204-1 -- 035204-7 - Y. Tokunaga, Y. Kaneko, D. Okuyama, S. Ishiwata, T. Arima, S. Wakimoto, K. Kakurai, Y. Taguchi, and Y. Tokura.:
"Multiferroic M-type hexaferrites with a room-temperature conical state and magnetically controllable spin helicity"
Physical Review Letters, December 2010, Vol. 105, 257201-1 - 257201-4 - H. Sakai, S. Ishiwata, D. Okuyama, A. Nakao, H. Nakao, Y. Murakami, Y. Taguchi, and Y. Tokura.:
"Electron doping in the cubic perovskite SrMnO3: Isotropic metal versus chainlike ordering of Jahn-Teller polarons"
Physical Review B, November 2010, Vol. 82, 180409(R)-1 - 180409 (R)-4
Principal Investigator
- Yasujiro TAGUCHI
- Team Leader
Postdoctoral Fellow
- Debraj CHOUDHURY
- Postdoctoral Researcher
- Daisuke MORIKAWA
- Postdoctoral Researcher
Technical Assistant
- Akiko KIKKAWA
- Technical Staff I