期刊论文详细信息
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】
Free