Origin of f-orbital-bonding insensitivity to spin-orbit coupling in UO2 Bo Gyu Jang, Seung Ill Hyun, Moo Hwan Kim, Massoud Kaviany and Ji Hoon Shim EPL, 112 1 (2015) 17012 Published online: 26 October 2015 DOI: 10.1209/0295-5075/112/17012