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Tc Maximum in Solid Solution of Pyrite IrSe2-RhSe2 Induced by Destabilization of Anion Dimers
Jiangang Guo, Yanpeng Qi, Satoru Matsuishi +1
We have established a well-defined dome shape Tc curve in Ir0.94-xRhxSe2 superconductors. The maximum Tconset of 9.6K was obtained at x=0.36, at which the Se-Se separation in the d…
Superconductivity in defective pyrite-type iridium chalcogenides IrxCh2 (Ch = Se and Te)
Yanpeng Qi, Satoru Matsuishi, Jiangang Guo +2
We report superconductivity in defective pyrite-type iridium chalcogenides IrxCh2. Maximum values of Tc of 6.4 K for Ir0.91Se2 and 4.7 K for Ir0.93Te2 were observed. It was found t…
Ferroelectricity Driven by Twisting of Silicate Tetrahedral Chains
Hiroki Taniguchi, Akihide Kuwabara, Jungeun Kim +10
Conventional perovskite-type ferroelectrics are based on octahedral units of oxygen, and often comprise toxic Pb to achieve robust ferroelectricity. Here, we report the ferroelectr…
Spin density wave and superconductivity in CaFe_{1-x}Co_{x}AsF studied by nuclear magnetic resonance
S. Tsutsumi, N. Fujiwara, S. Matsuishi +1
We performed nuclear magnetic resonance (NMR) measurements to investigate the evolution of spin-density-wave (SDW) and superconducting (SC) states upon electron doping in CaFe_{1-x…
Two-dome structure in electron-doped iron arsenide superconductors
Soshi Iimura, Satoru Matuishi, Hikaru Sato +6
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 structur…
Angle-resolved photoemission spectroscopy of Co-based boride superconductor LaCo1.73Fe0.27B2
K. Nakayama, E. Ieki, Y. Tanaka +6
We have performed angle-resolved photoemission spectroscopy of Co-based boride superconductor LaCo1.73Fe0.27B2 (Tc = 4.1 K), which is isostructural to the 122-type Fe-pnictide supe…