Field-induced structural evolution in the spin-Peierls compound CuGeO3: High-field ESR study

Article

关键词: SUBMILLIMETER-WAVE ESR;    SI-DOPED CUGEO3;    INCOMMENSURATE PHASE;    SOLITON LATTICE;    RESONANCE;    SCATTERING;    TRANSITION;    CHAINS;   

DOI  :  10.1103/PhysRevB.67.212403

来源: SCIE

【 摘 要 】

The dimerized-incommensurate phase transition in the spin-Peierls compound CuGeO3 is probed using the tunable-frequency high-resolution electron spin resonance technique in magnetic fields up to 17 T. A field-induced development of the solitonlike incommensurate superstructure is clearly indicated as a pronounced increase of the magnon spin resonance linewidth DeltaB, with a DeltaB(max) at B(c)similar to13.8 T. The anomaly is explained in terms of the magnon-soliton scattering and suggests that the solitonlike phase exists close to the boundary of the dimerized-incommensurate phase transition. In addition, magnetic excitation spectra in 0.8% Si-doped CuGeO3 are studied. Suppression of the DeltaB anomaly observed in the doped samples suggests a collapse of the long-range-ordered soliton states upon doping, which is consistent with high-field neutron experiments.

【 授权许可】

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