Two-dome structure in electron-doped iron arsenide superconductors

Soshi Iimura, Satoru Matsuishi, Hikaru Sato, Taku Hanna, Yoshinori Muraba, Sung Wng Kim, Jung Eun Kim, Masaki Takata and Hideo Hosono ()
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Soshi Iimura: Materials and Structures Laboratory, Tokyo Institute of Technology
Satoru Matsuishi: Materials and Structures Laboratory, Tokyo Institute of Technology
Hikaru Sato: Materials and Structures Laboratory, Tokyo Institute of Technology
Taku Hanna: Materials and Structures Laboratory, Tokyo Institute of Technology
Yoshinori Muraba: Materials and Structures Laboratory, Tokyo Institute of Technology
Sung Wng Kim: Frontier Research Center, Tokyo Institute of Technology
Jung Eun Kim: Japan Synchrotron Radiation Research Institute
Masaki Takata: Japan Synchrotron Radiation Research Institute
Hideo Hosono: Materials and Structures Laboratory, Tokyo Institute of Technology

Nature Communications, 2012, vol. 3, issue 1, 1-7

Abstract: Abstract Iron arsenide superconductors based on the material LaFeAsO1−xFx are characterized by a two-dimensional Fermi surface (FS) consisting of hole and electron pockets yielding structural and antiferromagnetic transitions at x=0. Electron doping by substituting O2− with F− suppresses these transitions and gives rise to superconductivity with a maximum Tc of 26 K at x=0.1. However, the over-doped region cannot be accessed due to the poor solubility of F− above x=0.2. Here we overcome this problem by doping LaFeAsO with hydrogen. We report the phase diagram of LaFeAsO1−xHx (x

Date: 2012
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DOI: 10.1038/ncomms1913

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