New Paired-Wavefunction for the Frustrated Antiferromagnetic Spin-Half Chain

1997/12/01 by Zou Ha, Z. N. C. Ha, Ha, Z. N. C.
Materials Science · Mathematics · Physics and Astronomy · #Algebraic structures and combinatorial models #Magnetism in coordination complexes #Physics of Superconductivity and Magnetism #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.48550/arxiv.cond-mat/9712015

arxiv created 1997/12/01 · arxiv updated 2009/11/30

Abstract

I propose a new paired-wavefunction with a parameter that continuously interpolates from the 1D Jastrow-product to the Majumdar-Ghosh dimer-wavefunction appropriate for the frustrated Heisenberg S = 1/2 antiferromagnet. This spin paired-state constructed in S_z basis is an alternative to the well-known resonating-valence-bond basis state for describing the S = 0 ground-state with no apparent long-range spin order. Some numerical evidences are presented.

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