K-Doping Dependence of the Fermi Surface of the Iron-Arsenic Ba1-xKxFe2As2 Superconductor Using Angle-Resolved Photoemission Spectroscopy

Journal Article · Fri Oct 24 04:00:00 EDT 2008 · Physical Review Letters

OSTI ID:962462

Liu, Chang; Samolyuk, G D; Lee, Y; Ni, Ni; Kondo, Takeshi; Santander-Syro, A F; Bud'ko, S L; McChesney, J L; Rotenberg, E; Valla, T; Fedorov, A V; Canfield, P C; Harmon, B N; and Kaminski, A

We use angle-resolved photoemission spectroscopy to investigate the electronic properties of the newly discovered iron-arsenic superconductor Ba{sub 1-x}K{sub x}Fe{sub 2}As{sub 2} and nonsuperconducting BaFe{sub 2}As{sub 2}. Our study indicates that the Fermi surface of the undoped, parent compound BaFe{sub 2}As{sub 2} consists of hole pocket(s) at {Lambda}(0,0) and larger electron pocket(s) at X (1,0), in general agreement with full-potential linearized plane wave calculations. Upon doping with potassium, the hole pocket expands and the electron pocket becomes smaller with its bottom approaching the chemical potential. Such an evolution of the Fermi surface is consistent with hole doping within a rigid-band shift model. Our results also indicate that the full-potential linearized plane wave calculation is a reasonable approach for modeling the electronic properties of both undoped and K-doped iron arsenites.

• Research Organization: Ames Laboratory (AMES), Ames, IA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC02-07CH11358
• OSTI ID: 962462
• Report Number(s): IS-J 7342
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 17 Vol. 101; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ELECTRONS
FERMI LEVEL
IRON
PHOTOEMISSION
POTASSIUM
SIMULATION
SPECTROSCOPY
SUPERCONDUCTORS