Fermi surface of Ba{1-x}KxFe2As2 as probed by angle-resolved photoemission

Details Fermi surface of Ba{1-x}KxFe2As2 as probed by angle-resolved photoemission Fermi surface of Ba{1-x}KxFe2As2 as probed by angle-resolved photoemission

2009-04-28

arxiv.org/abs/0904.4337v1

Physica C 469, 448-451 (2009)

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1016/j.physc.2009.03.043

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 G-X and G-Y directions.

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