Superconductivity in HEA-Type Compounds
TLDR
In this article, the effects of the introduction of a HEA site in various kinds of complicated compounds are discussed from the structuraldimensionality viewpoint, including NaCl-type metal tellurides, CuAl2-type transition metal zirconides, high-Tc cuprates, and BiS2-based layered superconductors.Abstract:
Since the discovery of superconductivity in a high-entropy alloy (HEA) Ti-Zr-Nb-Hf-Ta in 2014, the community of superconductor science has explored new HEA superconductors to find the merit of the HEA states on superconducting properties. Since 2018, we have developed HEA-type compounds as superconductors or thermoelectric materials. As well known, compounds like intermetallic compounds or layered compounds are composed of multi crystallographic sites. In a HEA-type compounds, one or more sites are alloyed and total mixing entropy satisfies with the criterion of HEA. Herein, we summarize the synthesis methods, the crystal structural variation and superconducting properties of the HEA-type compounds, which include NaCl-type metal tellurides, CuAl2-type transition metal zirconides, high-Tc cuprates, and BiS2-based layered superconductors. The effects of the introduction of a HEA site in various kinds of complicated compounds are discussed from the structural-dimensionality viewpoint.read more
Citations
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Superconductivity at 55 K in Iron-Based F-Doped Layered Quaternary Compound Sm[O1-xFx]FeAs
TL;DR: The O1-xFx FeAs as discussed by the authorsx [O1-XFx ] FeAs，与在 55.0K 的发作抵抗力转变温度
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Anomalous broadening of specific heat jump at T c in high-entropy-alloy-type superconductor TrZr2
Md. Riad Kasem,Aichi Yamashita,Taishi Hatano,Kota Sakurai,Naoko Oono-Hori,Yosuke Goto,Osuke Miura,Yoshikazu Mizuguchi +7 more
TL;DR: In this article, a broadening of specific heat jump near a superconducting transition tempreature (Tc) in transition-metal zirconides (TrZr2) with different mixing entropy (ΔSmix) at the Tr site is reported.
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Robustness of superconductivity to external pressure in high-entropy-alloy-type metal telluride AgInSnPbBiTe5
TL;DR: In this article , the authors investigated the crystal and electronic structure, and the robustness of superconducting states in a HEA-type metal telluride (MTe; M = Ag, In, Sn, Pb, Bi) under high pressure, and compared with the pressure effects for a middle entropy system (AgPbBiTe3) and a reference system of PbTe.
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Fabrication of high-entropy REBa<sub>2</sub>Cu<sub>3</sub>O<sub>7</sub>−δ thin films by pulsed laser deposition
TL;DR: In this article , thin films of RE Ba 2 Cu 3 O 7− δ (RE 123, RE : rare earth) having a high-entropy (HE) RE site were successfully fabricated by the pulsed laser deposition method.
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Superconductivity of high-entropy-alloy-type transition-metal zirconide (Fe,Co,Ni,Cu,Ga)Zr2
TL;DR: In this article , a new high-entropy-alloy-type (HEA-type) superconductor (Fe,Co,Ni,Cu,Ga)Zr2 with a T c of 2.9 K was synthesized.
References
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