Boundaries, cusps, and discontinuities in the multimagnon continua of one-dimensional quantum spin systems

Article

关键词: EXCITATION SPECTRUM;    MAGNETIC-FIELD;    STATES;    CHAIN;    TRANSITION;    EXPANSIONS;    DYNAMICS;    LADDERS;   

DOI  :  10.1103/PhysRevB.67.024412

来源: SCIE

【 摘 要 】

The multimagnon continua of one-dimensional quantum spin systems possess several interesting singular features that may soon be accessible experimentally through inelastic neutron scattering. These include cusps and composition discontinuities in the boundary envelopes of two-magnon continuum states and discontinuities in the density of states on and within the continuum, which will appear as discontinuities in scattering intensity. In this note we discuss the general origins of these continuum features, and illustrate our results using the alternating Heisenberg antiferromagnetic chain and two-leg ladder as examples.

【 授权许可】

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