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Anisotropic Optic Conductivities due to Spin and Orbital Orderings in LaVO3 and YVO3: First-Principles Studies
Zhong Fang, Naoto Nagaosa, Kiyoyuki Terakura
The anisotropy of low energy (05eV) optical excitations in strongly correlated transition-metal oxides is closely related to the spin and orbital orderings. The recent succes…
Spin Chirality Fluctuation and Anomalous Hall Effect in Itinerant Ferromagnets
Shigeki Onoda, Naoto Nagaosa
The anomalous Hall effect due to the spin chirality order and fluctuation is studied theoretically in a Kondo lattice model without the relativistic spin-orbit interaction. Even wi…
New Collective Modes in the Superconducting Ground States in the Gauge Theory Description of the Cuprates
Patrick A. Lee, Naoto Nagaosa
In the slave boson mean field treatment of the t-J model, the ground state for small doping is a d-wave superconductor. A conventional superconductor has collective modes associate…
Two-dimensional charge order in layered 2-1-4 perovskite oxides
Shigeki Onoda, Yukitoshi Motome, Naoto Nagaosa
Monte Carlo simulations are performed on the three-dimensional (3D) Ising model with the 2-1-4 layered perovskite structure as a minimal model for checkerboard charge ordering phen…
Theory for Slightly Doped Antiferromagnetic Mott Insulators
T. K. Lee, Chang-Ming Ho, Naoto Nagaosa +1
Trial wavefunctions, constructed explicitly from the unique 2-dimensional Mott insulating state with antiferromagnetic order, are proposed to describe the low-energy states of a Mo…
One-Dimensional Confinement and Enhanced Jahn-Teller Instability in LaVO
Yukitoshi Motome, Hitoshi Seo, Zhong Fang +1
Ordering and quantum fluctuations of orbital degrees of freedom are studied theoretically for LaVO in spin-C-type antiferromagnetic state. The effective Hamiltonian for the orb…