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

Yoichi Kamihara, Hideo Hosono

Research output: Contribution to journalArticle

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 languageEnglish
Pages (from-to)97-105
Number of pages9
JournalReview of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu
Volume19
Issue number2
DOIs
Publication statusPublished - 2009
Externally publishedYes

Fingerprint

Superconducting materials
Iron
histories
iron
Tides
tides
Superconducting transition temperature
Transition metals
Crystal structure
transition metals
transition temperature
Doping (additives)
conduction
crystal structure
symmetry
Temperature
temperature

ASJC Scopus subject areas

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

Cite this

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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.",
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