@article {4560,
	title = {Plaquette valence bond state in the spin- 12 J1 -J2 XY model on the square lattice.},
	journal = {PHYSICAL REVIEW B},
	volume = {107, 214402(2023)},
	year = {2023},
	author = {Chan, Y. -H. and Hong-Chen Jiang and Y.-C. Chen}
}
