63 citations · 89 across the 5 of their papers we have counts for
5 papers
Antisymmetric Dynamical Spin Correlations: Spin-Space-Group Constraints and Frequency-Moment Sum Rules
Tsutomu Momoi
Polarized inelastic neutron scattering probes the handedness of magnetic excitations through the spin-component-antisymmetric part of the dynamical spin-structure-factor tensor. We…
Numerical Block Diagonalization and Linked-Cluster Expansion for Deriving Effective Hamiltonians: Applications to Spin Excitations
Tsutomu Momoi, Owen Benton
We present a numerical, non-perturbative framework for constructing effective Hamiltonians that describe the dynamics of low-energy degrees of freedom within a restricted Hilbert s…
Magnetic phase diagram of the spin-1/2 antiferromagnetic zigzag ladder
T. Hikihara, T. Momoi, A. Furusaki +1
We study the one-dimensional spin-1/2 Heisenberg model with antiferromagnetic nearest-neighbor J_1 and next-nearest-neighbor J_2 exchange couplings in magnetic field h. With varyin…
Finite-Temperature Mott Transition in Two-Dimensional Frustrated Hubbard Models
Takuma Ohashi, Tsutomu Momoi, Hirokazu Tsunetsugu +1
We investigate the Hubbard model on two typical frustrated lattices in two dimensions, the kagome lattice and the anisotropic triangular lattice, by means of the cellular dynamical…
Nematic order in the multiple-spin exchange model on the triangular lattice
Tsutomu Momoi, Nic Shannon
We discuss the possibility of finding n-type nematic order in the vicinity of a FM phase in the multiple--spin exchange model on the triangular lattice. We study this problem both…