Spin Liquid State around a Doped Hole in Insulating Cuprates
T. Tohyama, Y. Shibata, S. Maekawa, Z. -X. Shen, N. Nagaosa, L. L. Miller
Abstract
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 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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