Quantum Matter Theory Research Team

Quantum Matter Theory Research Team theoretically studies emergent quantum phenomena of strongly correlated electrons in transition metal oxides, molecular conductors, frustrated quantum magnets, and topological insulators and superconductors, etc. We construct effective models for interacting electrons in materials of interest and study their physical properties such as magnetism and transport using both analytical and numerical methods.

Research Fields

Physics / Materials Sciences

Research Subjects

• Transport properties of strongly correlated electron system
• Magnetism of strongly correlated electron system
• Topological phases

Publications

1. Furukawa, S., Sato, M., Onoda, S., Furusaki, A.:
   "Ground-state phase diagram of a spin-1/2 frustrated ferromagnetic XXZ chain: Haldane dimer phase and gapped/gapless chiral phases"
   Phys. Rev. B 86, 094417 (2012).
2. Yoshimi, K., Seo, H., Ishibashi, S., Brown, S.E.:
   "Tuning the magnetic dimensionality by charge ordering in the molecular TMTTF salts"
   Phys. Rev. Lett. 108, 096402 (2012).
3. Momoi T., Sindzingre, P., Kubo, K.:
   "Spin nematic order in multiple-spin exchange models on the triangular lattice"
   Phys. Rev. Lett. 108, 057206 (2012).
4. Nomura, K., Ryu, S., Furusaki, A., Nagaosa, N.:
   "Cross-correlated responses of topological superconductors and superfluids"
   Phys. Rev. Lett. 108, 026802 (2012).
5. Onoda, S., Tanaka, Y.:
   "Quantum fluctuations in the effective pseudospin-1/2 model for magnetic pyrochlore oxides"
   Phys. Rev. B 83, 094411 (2011).
6. Furukawa, S., Sato, M., Onoda, S.:
   "Chiral order and electromagnetic dynamics in one-dimensional multiferroic cuprates"
   Phys. Rev. Lett. 105, 257205 (2010).
7. Hikihara, T., Momoi, T., Furusaki, A., Kawamura, H.:
   "Magnetic phase diagram of the spin-1/2 antiferromagnetic zigzag ladder"
   Phys. Rev. B 81, 224433 (2010).
8. Ryu, S., Schnyder, A.P., Furusaki, A., Ludwig, A.W.W.:
   "Topological insulators and superconductors: ten-fold way and dimensional hierarchy"
   New J. Phys. 12, 065010 (2010).
9. Hikihara, T., Kecke, L., Momoi, T., Furusaki, A.:
   "Vector chiral and multipolar orders in the spin-1/2 ferromagnetic frustrated chain in magnetic field"
   Phys. Rev. B 78, 144404 (2008).
10. Schnyder, A.P., Ryu, S., Furusaki, A., Ludwig, A.W.W.:
    "Classification of topological insulators and superconductors in three spatial dimensions"
    Phys. Rev. B 78, 195125 (2008).