title: Detection of antiferromagnetic ordering in heavily doped LaFeAsO(1-x)H(x) pnictide superconductors using nuclear-magnetic-resonance techniques.
abstract: We studied double superconducting (SC) domes in LaFeAsO(1-x)H(x) by using 75As and 1H nuclear-magnetic-resonance techniques and unexpectedly discovered that a new antiferromagnetic (AF) phase follows the double SC domes on further H doping, forming a symmetric alignment of AF and SC phases in the electronic phase diagram. We demonstrated that the new AF ordering originates from the nesting between electron pockets, unlike the nesting between electron and hole pockets, as seen in the majority of undoped pnictides. The new AF ordering is derived from the features common to high-Tc pnictides; however, it has not been reported so far for other high-Tc pnictides because of their poor electron doping capability.
authors.affiliation: Graduate School of Human and Environmental Studies, Kyoto University, Yoshida-Nihonmatsu-cyo, Sakyo-ku, Kyoto 606-8501, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Fujiwara
authors.forename: S
authors.initials: S
authors.lastname: Tsutsumi
authors.forename: S
authors.initials: S
authors.lastname: Iimura
authors.forename: S
authors.initials: S
authors.lastname: Matsuishi
authors.forename: H
authors.initials: H
authors.lastname: Hosono
authors.forename: Y
authors.initials: Y
authors.lastname: Yamakawa
authors.forename: H
authors.initials: H
authors.lastname: Kontani