Variational study of J1- J2 Heisenberg model on kagome lattice using projected Schwinger-boson wave functions
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چکیده
Motivated by the unabating interest in the spin-1/2 Heisenberg antiferromagnetic model on the kagome lattice, we investigate the energetics of projected Schwinger-boson (SB) wave functions in the J1-J2 model with antiferromagnetic J2 coupling. Our variational Monte Carlo results show that Sachdev’s Q1 = Q2 SB ansatz has a lower energy than the Dirac spin liquid for J2 0.08J1 and the q = 0 Jastrow-type magnetically ordered state. This work demonstrates that the projected SB wave functions can be tested on the same footing as their fermionic counterparts.
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تاریخ انتشار 2011