Nonadiabatic approach to spin-Peierls transitions via flow equations

Article

关键词: MATRIX RENORMALIZATION-GROUP;    SOLITON LATTICE STATE;    EXCITATION SPECTRUM;    NEUTRON-SCATTERING;    SYSTEM CUGEO3;    CHAINS;    DIMERIZATION;    FIELDS;   

DOI  :  10.1103/PhysRevB.57.R14004

来源: SCIE

【 摘 要 】

The validity of the adiabatic approach to spin-Peierls transitions is assessed. An alternative approach is developed which maps the initial magnetoelastic problem to an effective magnetic problem only. Thus the equivalence of magnetoelastic solitons and magnetic spinons is shown. No soft phonon is required for the transition. Temperature-dependent couplings are predicted in accordance with the analysis of experimental data.

【 授权许可】

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