Liu, ChangXu, Su-YangAlidoust, NasserChang, Tay-RongLin, HsinDhital, ChetanKhadka, SovitNeupane, MadhabBelopolski, IlyaLandolt, GabrielJeng, Horng-TayMarkiewicz, Robert S.Dil, J. HugoBansil, ArunWilson, Stephen D.Hasan, M. Zahid2015-06-232015-06-232015-06-23201410.1103/PhysRevB.90.045127https://infoscience.epfl.ch/handle/20.500.14299/115342WOS:000339482200005We use angle-resolved photoemission spectroscopy to show that the near-surface electronic structure of a bulk insulating iridate Sr3Ir2O7 lying near a metal-Mott insulator transition exhibits weak metallicity signified by finite electronic spectral weight at the Fermi level. The surface electrons exhibit a spin structure resulting from an interplay of spin-orbit, Coulomb interaction and surface quantum magnetism. Our results shed light on understanding the exotic quantum entanglement and transport phenomena in iridate-based oxide devices.text::journal::journal article::research article