Quantum spin liquid in Sr_2CuO_3 induced by Acoustic Phonons

Details Quantum spin liquid in Sr_2CuO_3 induced by Acoustic Phonons Quantum spin liquid in Sr_2CuO_3 induced by Acoustic Phonons

2002-08-21

arxiv.org/abs/cond-mat/0208397v1

Physics

Condensed Matter

Soft Condensed Matter

10 pages, 6 figures

Scientific paper

We have carried out theoretical studies of the phonons and spinons excitation spectra of $Sr_2CuO_3 $ in term of a one-dimensional model with non-adiabatic interaction magnetic and elastic subsystems using continuous time Monte Carlo method. Two gaps in triplet excitation spectrum are found. The bond defects concentration estimated is well agreement with the experimental data. The formation of magnetic moment on site at low temperature $T_N \sim 5 K$ is caused by freezing quantum spin liquid with correlation radius of antiferromagnetic ordering $\xi/a \sim 300 - 500$

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