2000/04/06 by Jean‐Philippe Boucher, J. P. Boucher, M. Takigawa
Chemistry · Mathematics · Physics and Astronomy · #Advanced Condensed Matter Physics #Antiferromagnetism #Chemistry #Condensed matter physics #Coupling (piping) #Crystallography #Field (mathematics) #Heisenberg model #Magnetic field #Magnetization #Materials science #Mathematics #Physics #Physics of Superconductivity and Magnetism #Pure mathematics #Quantum #Quantum mechanics #Spectrum (functional analysis) #Spin (aerodynamics) #Theoretical and Computational Physics #Thermodynamics #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.62.367
4 pages + 3 figures. To appear in Physical Review B
arxiv created 2000/04/06 · openalex publication_date 2000/07/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
A model of mobile bond defects is tentatively proposed to analyze the ``anomalies'' observed on the NMR spectrum of the quantum Heisenberg chains of Sr2CuO3. A bond defect is a local change in the exchange coupling. It results in a local alternating magnetization (LAM), which, when the defect moves, creates a flipping process of the local field seen by each nuclear spin. At low temperature, when the overlap of the LAM becomes large, the defects form a periodic structure, which extends over almost all the chains. In that regime, the density of bond defects decreases linearly with T.