Propeller-Like Low Temperature Fermi Surface of Ba1-xKxFe2As2 from Magnetotransport and Photoemission Measurements

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The Hall coefficient of the hole-doped iron arsenide Ba1-xKxFe2As2 (BKFA) is calculated purely on the basis of the electronic structure, revealed in the angle-resolved photoemission spectroscopy (ARPES) experiments, and compared to the one measured directly. The observed agreement allows us to state that upon cooling the Fermi surface (FS) in the optimally doped BKFA gradually evolves to the propeller-like topology, on which the superconductivity develops. Persistence of the notable temperature dependence in both photoemission and magnetotransport experiments well above the spin-density-wave (SDW) transition suggests that the FS reconstruction in BKFA is partially decoupled from the emergence of static magnetism.
2011-02-15

著者

Wen Hai-hu
Institude Of Physics Chinese Academy Of Science
Luo Huiqian
Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Kim Timur
Institute for Solid State Research, IFW Dresden, P. O. Box 270116, D-01171 Dresden, Germany
Wen Hai-Hu
Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Evtushinsky Daniil
Institute for Solid State Research, IFW Dresden, P. O. Box 270116, D-01171 Dresden, Germany
Kordyuk Alexander
Institute for Solid State Research, IFW Dresden, P. O. Box 270116, D-01171 Dresden, Germany
Zabolotnyy Volodymyr
Institute for Solid State Research, IFW Dresden, P. O. Box 270116, D-01171 Dresden, Germany
Inosov Dmytro
Max-Planck-Institute for Solid State Research, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
Büchner Bernd
Institute for Solid State Research, IFW Dresden, P. O. Box 270116, D-01171 Dresden, Germany
Wang Zhaosheng
Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Sun Guoli
Max-Planck-Institute for Solid State Research, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
Lin Chengtian
Max-Planck-Institute for Solid State Research, Heisenbergstrasse 1, D-70569 Stuttgart, Germany
Borisenko Sergey
Institute for Solid State Research, IFW Dresden, P. O. Box 270116, D-01171 Dresden, Germany
Büchner Bernd
Institute for Solid State Research, IFW Dresden, P. O. Box 270116, D-01171 Dresden, Germany
Lin Chengtian
Max-Planck-Institut für Festkörperforschung, 70569 Stuttgart, Germany
Sun Guoli
Max-Planck-Institut für Festkörperforschung, 70569 Stuttgart, Germany

Propeller-Like Low Temperature Fermi Surface of Ba1-xKxFe2As2 from Magnetotransport and Photoemission Measurements

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