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cond-mat.str-el2026
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…
cond-mat.str-el2025
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…
cond-mat.str-el2006★ 16 cited
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…