Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1819109 | Physica C: Superconductivity and its Applications | 2009 | 4 Pages |
Abstract
Here we apply high resolution angle-resolved photoemission spectroscopy (ARPES) using a wide excitation energy range to probe the electronic structure and the Fermi surface topology of the Ba1−xKxFe2As2 (Tc = 32 K) superconductor. We find significant deviations in the low energy band structure from that predicted in calculations. A set of Fermi surface sheets with unexpected topology is detected at the Brillouin zone boundary. At the X-symmetry point the Fermi surface is formed by a shallow electron-like pocket surrounded by four hole-like pockets elongated in Γ−X and Γ−Y directions.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
V.B. Zabolotnyy, D.V. Evtushinsky, A.A. Kordyuk, D.S. Inosov, A. Koitzsch, A.V. Boris, G.L. Sun, C.T. Lin, M. Knupfer, B. Büchner, A. Varykhalov, R. Follath, S.V. Borisenko,