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Spin Liquid State around a Doped Hole in Insulating Cuprates

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arxiv cond-mat/9904231 v2 pith:VVFJQGKM submitted 1999-04-16 cond-mat.str-el cond-mat.supr-con

T. Tohyama , Y. Shibata , S. Maekawa , Z.-X. Shen , N. Nagaosa , L. L. Miller This is my paper
classification cond-mat.str-elcond-mat.supr-con
keywords cupratesinsulatingspinstatearounddopedholeliquid
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The numerically exact diagonalization study on small clusters of the t-J model with the second- and third- neighbor hopping terms shows that a novel spin liquid state is realized around a doped hole with momentum k=(pi,0) and energy \sim 2J compared with that with (pi/2,pi/2) in insulating cuprates, where the spin and charge degrees of freedom are approximately decoupled. Our finding implies that the excitations in the insulating cuprates are mapped onto the the d-wave resonating valence bond state.

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