Variational states for the spin-Peierls system

Article

关键词: GUTZWILLER WAVE-FUNCTION;    ANTIFERROMAGNETIC HEISENBERG CHAIN;    LONG-RANGE INTERACTIONS;    GROUND-STATE;    COMPETING INTERACTIONS;    EXCITATION SPECTRUM;    CORRELATED FERMIONS;    FIELD-THEORY;    CUGEO3;    EXCHANGE;   

DOI  :  10.1103/PhysRevB.56.5359

来源: SCIE

【 摘 要 】

We introduce a family of Jastrow pair product states for quasi-one-dimensional spin systems. Depending on a parameter they interpolate between the resonating valence-bond ground state of the Haldane-Shastry model describing a spin liquid and the (dimerized) valence-bond solid ground states of the Majumdar-Ghosh spin chain. These states are found to form an excellent basis for variational studies of Heisenberg chains with next-nearest-neighbor interactions and bond alternation as realized in the spin-Peierls system CuGeO3.

【 授权许可】

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