We investigate a one-dimensional S=1 antiferromagnetic Heisenberg model coupled to lattice distortion by a quantum Monte Carlo method. The instability to a dimerized chain in the ground state depends on the value of the elastic constant, unlike the case of S=1/2. We find the first-order transition between a uniform Haldane state and a dimerized state. The two non-magnetic states coexist in the ground state and a domain-wall structure is observed.

Progress of Theoretical Physics SupplementJan 1, 20022 citations

Dynamical properties of spin-Peierls transition in 1-d quantum(s=1/2) antiferromagnet

Natsuko Maya, A. Kozuki, Ki-ichi Nakamura +1 more

日本物理学会講演概要集Mar 16, 19950 citations

Journal of Physics and Chemistry of Solids

First-order spin-Peierls transition in S=1 antiferromagnetic Heisenberg chains

Hiroaki Onishi, Seiji Miyashita

Published Jun 1, 2002• 3 citations

Publisher

DOI: 10.1016/s0022-3697(02)00089-6

Related papers

Spin dynamics of spin-Peierls transition in quantum Heisenberg antiferromagnetic chain

Atsuko Kouzuki, Natsuko Maya, 和子川崎 +1 more

Journal of Magnetism and Magnetic MaterialsJan 1, 19980 citations

Spin-Peierls transition in an anisotropic 2D antiferromagnetic Heisenberg model

Pinaki Sengupta, Rajiv R. P. Singh

APSMar 1, 20030 citations

Spin dynamics of the spin-Peierls transition in a quantum antiferromagnetic chain

淳子上月

博士学位論文 : 内容の要旨及び審査の結果の要旨Jul 1, 20000 citations

Spin-Peierls transition of the first order in S=1 antiferromagnetic Heisenberg chains

Hiroaki Onishi, Seiji Miyashita

We investigate a one-dimensional $S=1$ antiferromagnetic Heisenberg model coupled to a lattice distortion by a quantum Monte Carlo method. Investigating the ground-state energy of the static bond-alternating chain, we find that the instability to a dimerized chain depends on the value of the spin-phonon coupling, unlike the case of $S=\frac{1}{2}.$ The spin state is the dimer state or the uniform Haldane state depending on whether the lattice distorts or not, respectively. At an intermediate value of the spin-phonon coupling, we find the first-order transition between the two states. We also find the coexistence of the two states.We investigate a one-dimensional $S=1$ antiferromagnetic Heisenberg model coupled to a lattice distortion by a quantum Monte Carlo method. Investigating the ground-state energy of the static bond-alternating chain, we find that the instability to a dimerized chain depends on the value of the spin-phonon coupling, unlike the case of $S=\frac{1}{2}.$ The spin state is the dimer state or the uniform Haldane state depending on whether the lattice distorts or not, respectively. At an intermediate value of the spin-phonon coupling, we find the first-order transition between the two states. We also find the coexistence of the two states.

arXiv:cond-mat/0012377Physical review. B, Condensed matterJun 6, 20019 citations

Spin-Peierls Transition inS=1 Antiferromagnetic Heisenberg Chains

Hiroaki Onishi, Seiji Miyashita

Progress of Theoretical Physics SupplementJan 1, 20022 citations

Dynamical properties of spin-Peierls transition in 1-d quantum(s=1/2) antiferromagnet

Natsuko Maya, A. Kozuki, Ki-ichi Nakamura +1 more

日本物理学会講演概要集Mar 16, 19950 citations

We investigate a one-dimensional

S=1

antiferromagnetic Heisenberg model coupled to a lattice distortion by a quantum Monte Carlo method. Investigating the ground-state energy of the static bond-alternating chain, we find that the instability to a dimerized chain depends on the value of the spin-phonon coupling, unlike the case of

S=\frac{1}{2}.

The spin state is the dimer state or the uniform Haldane state depending on whether the lattice distorts or not, respectively. At an intermediate value of the spin-phonon coupling, we find the first-order transition between the two states. We also find the coexistence of the two states.