A small history to discovery of iron based high T c superconductors and summary

Yoichi Kamihara; Hideo Hosono

doi:10.4131/jshpreview.19.97

A small history to discovery of iron based high T _c superconductors and summary

Yoichi Kamihara, Hideo Hosono

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

We discovered iron-based layered superconductors: F-doped LaFePnO (Pn = P, As) in 2006. Several superconductors containing square iron lattice have been reported in 2008. Superconducting transition temperature (T _c) of F-doped LnFeAsO (Ln = Nd, Sm, ...) reaches ∼55 K. LaFePnO is a 3d transition-metal (T _M) based oxypnic-tides: LnT _MPnO. The crystal structure is composed of carrier conducting T _m-Pn layer and insulating Ln-O layer. Undoped LnFePO (Ln = La, Sm) shows T _c ∼3-5 K, while undoped LnFeAsO shows no T _c. The undoped LnFeAsO takes an orthorhombic crystallographic phase at temperatures below ∼160 K, F-doping suppresses the structural transition from tetragonal to orthorhombic phase, stabilizing the tetragonal lattice of LnFeAsO. F-doped LnFeAsO with tetragonal symmetry exhibits T _c.

Original language	English
Pages (from-to)	97-105
Number of pages	9
Journal	Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu
Volume	19
Issue number	2
DOIs	https://doi.org/10.4131/jshpreview.19.97
Publication status	Published - 2009
Externally published	Yes

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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title = "A small history to discovery of iron based high T c superconductors and summary",

abstract = "We discovered iron-based layered superconductors: F-doped LaFePnO (Pn = P, As) in 2006. Several superconductors containing square iron lattice have been reported in 2008. Superconducting transition temperature (T c) of F-doped LnFeAsO (Ln = Nd, Sm, ...) reaches ∼55 K. LaFePnO is a 3d transition-metal (T M) based oxypnic-tides: LnT MPnO. The crystal structure is composed of carrier conducting T m-Pn layer and insulating Ln-O layer. Undoped LnFePO (Ln = La, Sm) shows T c ∼3-5 K, while undoped LnFeAsO shows no T c. The undoped LnFeAsO takes an orthorhombic crystallographic phase at temperatures below ∼160 K, F-doping suppresses the structural transition from tetragonal to orthorhombic phase, stabilizing the tetragonal lattice of LnFeAsO. F-doped LnFeAsO with tetragonal symmetry exhibits T c.",

author = "Yoichi Kamihara and Hideo Hosono",

year = "2009",

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AU - Hosono, Hideo

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AB - We discovered iron-based layered superconductors: F-doped LaFePnO (Pn = P, As) in 2006. Several superconductors containing square iron lattice have been reported in 2008. Superconducting transition temperature (T c) of F-doped LnFeAsO (Ln = Nd, Sm, ...) reaches ∼55 K. LaFePnO is a 3d transition-metal (T M) based oxypnic-tides: LnT MPnO. The crystal structure is composed of carrier conducting T m-Pn layer and insulating Ln-O layer. Undoped LnFePO (Ln = La, Sm) shows T c ∼3-5 K, while undoped LnFeAsO shows no T c. The undoped LnFeAsO takes an orthorhombic crystallographic phase at temperatures below ∼160 K, F-doping suppresses the structural transition from tetragonal to orthorhombic phase, stabilizing the tetragonal lattice of LnFeAsO. F-doped LnFeAsO with tetragonal symmetry exhibits T c.

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