@article {10577,
	title = {Gd on GaN(0001) surface: Growth, interaction, and Fermi level movement},
	journal = {Journal of Applied Physics},
	year = {2003},
	pages = {4847-4852},
	doi = {10.1063/1.1609636},
	author = {Wende Xiao and Qinlin Quo and Qikun Xue and E.G. Wang}
}
