Quantum narrowing effect in a spin-Peierls system with quantum lattice fluctuation

@article{Onishi2003QuantumNE,
  title={Quantum narrowing effect in a spin-Peierls system with quantum lattice fluctuation},
  author={Hiroaki Onishi and Seiji Miyashita},
  journal={Journal of the Physical Society of Japan},
  year={2003},
  volume={72},
  pages={392-398}
}
We investigate a one-dimensional S =1/2 antiferromagnetic Heisenberg model coupled to quantum lattice vibration using a quantum Monte Carlo method. We study the ground-state lattice fluctuation whe... 
Quantum Phase Transition in Antiferromagnetic Heisenberg Chains Coupled to Phonons
We develop an analytical approach based on a unitary transformation to investigate S =1/2 antiferromagnetic Heisenberg chains coupled to phonons, and find a new quantum phase transition at zero
Spontaneous distortion in the spin-1/2 Ising-Heisenberg model on decorated planar lattices with a magnetoelastic coupling
Abstract Magnetoelastic properties of the spin-1/2 Ising-Heisenberg model on doubly decorated planar lattices partially amenable to lattice vibrations are examined within the framework of the
Monte Carlo Study of Spin-Peierls Transition in Quasi-One-Dimensional Heisenberg Model with Finite-Frequency Phonons
A quasi-one-dimensional spin-1/2 Heisenberg antiferromagnet coupled with optical phonons is numerically studied by the quantum Monte Carlo method. We have implemented the stochastic series expansion
Monte Carlo Method for Spin-Peierls Systems
The novel quantum Monte Carlo method for nonconserved particles will be presented in this chapter. The quantum Monte Carlo method based on the worldline representation has been applied to a wide
Adiabatic-antiadiabatic crossover in a spin-Peierls chain
We consider an XXZ spin-1/2 chain coupled to optical phonons with nonzero frequency ω0. In the adiabatic limit (small ω0), the chain is expected to spontaneously dimerize and open a spin gap, while
$$XXZ$$ X X Z Spin-Peierls Chain
The phase transition and the phase diagram between the adiabatic and antiadiabatic limits in the spin-Peierls model will be investigated in this chapter. As we explained in Chap. 3, the conventional
Quantum diffusion in polaron model of poly(dG)-poly(dC) and poly(dA)-poly(dT) DNA polymers
Abstract.We numerically investigate quantum diffusion of an electron in a model of poly(dG)-poly(dC) and poly(dA)-poly(dT) DNA polymers with fluctuation of the parameters due to the impact of colored
The loop algorithm
A review of the loop algorithm , its generalizations, and its relation to some other Monte Carlo techniques is given. The loop algorithm is a quantum Monte Carlo procedure that employs non-local

References

SHOWING 1-10 OF 22 REFERENCES
Temperature Dependence of Spin and Bond Ordering in a Spin-Peierls System
We investigate thermodynamic properties of a one-dimensional S =1/2 antiferromagnetic Heisenberg model coupled to a lattice distortion by a quantum Monte Carlo method. In particular we study how sp...
QUANTUM LATTICE FLUCTUATIONS IN THE GROUND STATE OF AN XY SPIN-PEIERLS CHAIN
An analytical approach, based on the unitary transformation method, has been developed to study the effect of quantum lattice fluctuations on the ground state of an XY spin-Peierls chain, which is
Phase Diagram of a Heisenberg Spin-Peierls Model with Quantum Phonons
Using a new version of the density-matrix renormalization group we determine the phase diagram of a model of an antiferromagnetic Heisenberg spin chain where the spins interact with quantum phonons.
World-line Monte Carlo study of the dispersion relation of an S=1 antiferromagnetic Heisenberg chain
A world-line quantum Monte Carlo method is employed to study the dispersion relation of an S =1 antiferromagnetic Heisenberg chain. An imaginary-time correlation function is evaluated on a
Quantum lattice fluctuations in a frustrated Heisenberg spin-Peierls chain
As a simple model for spin-Peierls systems we study a frustrated Heisenberg chain coupled to optical phonons. In view of the anorganic spin-Peierls compound CuGeO3 we consider two different
Thermodynamical Properties of a Spin 1/2 Heisenberg Chain Coupled to Phonons
We performed a finite-temperature quantum Monte Carlo simulation of the one-dimensional spin-1/2 Heisenberg model with nearest-neighbor interaction coupled to Einstein phonons. Our method allows to
Observation of a Spin-Peierls Transition in a Heisenberg Antiferromagnetic Linear-Chain System
Magnetic-susceptibility and EPR measurements are reported which provide the first unambiguous evidence for a spin-Peierls transition in a system of linear one-dimensional antiferromagnetic Heisenberg
Nonadiabatic Approach to Spin-Peierls Transitions via Flow Equations
The validity of the adiabatic approach to spin-Peierls transitions is assessed. An alternative approach is developed which maps the initial magneto-elastic problem to an effective magnetic problem
Magnetoelastic excitations in spin-Peierls systems
From the random-phase approximation to the spin-Peierls transition, two parameter regimes of phonon softening and hardening are present. Magnetoelastic excitations are discussed in detail for phonons
Phase diagram of one-dimensional electron-phonon systems. I. the Su-Schrieffer-Heeger model
We study the nature of the ground state of the Su-Schrieffer-Heeger model for electron-phonon interactions in one dimension in the half-filled-band case. We consider the cases of spinless electrons
...
1
2
3
...