Indexed by:Journal paper Co-author:M Neupane, P Richard, Y-M Xu, K Nakayama, T Sato, T Takahashi, AV Federov, G Xu, X Dai, Z Fang, Z Wang, G-F Chen, N-L Wang, H-H Wen, H Ding Journal:Physical Review B Included Journals:SCI Discipline:Science First-Level Discipline:Physics Document Type:J Volume:83 Issue:9 Page Number:094522 Date of Publication:2011-03-16 Abstract:We have performed a systematic photoemission study of the chemical-potential shift as a function of carrier doping in a pnictide system based on BaFe 2 As 2. The experimentally determined chemical-potential shift is consistent with the prediction of a rigid band shift picture by renormalized first-principle band calculations. This leads to an electron-hole asymmetry (EHA) in the Fermi surface (FS) nesting condition due to different effective masses for different FS sheets, which can be calculated from the Lindhard function of susceptibility.