Strong Correlation Theory Research Group

We study theoretically the electronic states in solids from the viewpoint of topology and explore new functions, including non-dissipative currents. Combining first-principles electronic structure calculations, analytic methods of quantum field theory and numerical analysis of models for correlated systems, we predict and design magnetic, optical, transport and thermal properties of correlated electrons focusing on their internal degrees of freedom such as spin and orbital. In particular, we study extensively the nontrivial interplay between these various properties, i.e., cross-correlation, and develop new concepts such as electron fractionalization and non-dissipative quantum operation by considering the topology given by the relativistic spin-orbit interaction and/or spin textures.

Research Fields

Physics / Engineering / Materials Sciences

Publications

1. Bahramy,, M. S., Yang, B. -J., Arita, R., Nagaosa, N.,
   Emergence of non-centrosymmetric topological insulating phase in BiTeI under pressure
   Nature Communications 3, 679 (2012).
2. K. Ishizaka, et al. Giant Rashba-type spin splitting in bulk BiTeI, Nature Mater. 2011, 10, 521.
3. N. Nagaosa, J. Sinova, S. Onoda, A. H. MacDonald, N. P. Ong, Anomalous Hall effect, Rev. Mod. Phys. 2010, 82, 1539.
4. Y. Onose, et al. Observation of the Magnon Hall Effect, Science 2010, 329, 297.
5. P. A. Lee, N. Nagaosa, X. G. Wen, Doping a Mott insulator: Physics of high-temperature superconductivity, Rev. Mod. Phys. 2006, 78, 17.
6. S. Murakami, N. Nagaosa, S. C. Zhang, Dissipationless quantum spin current at room temperature, Science 2003, 301, 1348.
7. Z. Fang, et al. The anomalous Hall effect and magnetic monopoles in momentum space, Science 2003, 302, 92.
8. Y. Taguchi, Y. Oohara, H. Yoshizawa, N. Nagaosa, Y. Tokura, Spin Chirality, Berry Phase, and Anomalous Hall Effect in a Frustrated Ferromagnet, Science 2001, 291, 2573.
9. Y. Tokura, N. Nagaosa, Orbital Physics in Transition-Metal Oxides, Science 2000, 288, 462.
10. S. Ishihara, M. Yamanaka, N. Nagaosa, Orbital Liquid in La1-xSrxMnO3, Phys. Rev. B 1997, 56, 686.