39 citations · 224 across the 18 of their papers we have counts for
18 papers
Domain State of the ANNNI model in Two Dimensions
Fumitaka Matsubara, Takayuki Shirakura, Nobuo Suzuki
We have examined the spin ordering of an axial next-nearest-neighbor Ising (ANNNI) model in two dimensions (2D) near above the antiphase ( phase). We considered…
Absence of a classical long-range order in Heisenberg antiferromagnet on triangular lattice
Nobuo Suzuki, Fumitaka Matsubara, Sumiyoshi Fujiki +1
We study the quantum phase transition of an anisotropic Heisenberg antiferromagnet on a triangular lattice. We calculate the sublattice magnetizat…
Kosterlitz-Thouless Phase Transition of the ANNNI model in Two Dimensions
T. Shirakura, F. Matsubara, N. Suzuki
The spin structure of an axial next-nearest-neighbor Ising (ANNNI) model in two dimensions (2D) is a renewed problem because different Monte Carlo (MC) simulation methods predicted…
Ground-State Properties of a Heisenberg Spin Glass Model with a Hybrid Genetic Algorithm
Yuh-ichi Iyama, Fumitaka Matsubara
We developed a genetic algorithm (GA) in the Heisenberg model that combines a triadic crossover and a parameter-free genetic algorithm. Using the algorithm, we examined the ground-…
Stochastic Cutoff Method for Long-Range Interacting Systems
Munetaka Sasaki, Fumitaka Matsubara
A new Monte-Carlo method for long-range interacting systems is presented. This method consists of eliminating interactions stochastically with the detailed balance condition satisf…
Gabay-Toulouse Phase Transition in Heisenberg Spin-Glasses in Three Dimensions
T. Shirakura, D. Ninomiya, Y. Iyama +1
We examine three-dimensional Heisenberg models with and without random anisotropies in a magnetic field. We calculate both the stiffness exponent at absolute zero tem…