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Fe-vacancy order and superconductivity in tetragonal [beta]-[Fe.sub.1-x]Se.(PHYSICS)(Report)(Author abstract)

Several superconducting transition temperatures in the range of 30-46 K were reported in the recently discovered intercalated FeSe system ([A.sub.1-x][Fe.sub.2-y][Se.sub.2], A = K, Rb, Cs, TI). Although the superconducting phases were not yet conclusively decided, more than one magnetic phase with p... Full description

Journal Title: Proceedings of the National Academy of Sciences of the United States Jan 7, 2014, Vol.111(1), p.63(6)
Main Author: Chert, Ta - Kun
Other Authors: Chang, Chung - Chieh , Chang, Hsian - Hong , Fang, Ai - Hua , Wang, Chih - Han , Chao, Wei - Hsiang , Tseng, Chuan - Ming , Lee, Yung - Chi , Wu, Yu - Ruei , Wen, Min - Hsueh , Tang, Hsin - Yu , Chen, Fu - Rong , Wang, Ming - Jye , Wu, Maw - Kuen , Van Dyck, Dirk
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Language: English
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ID: ISSN: 0027-8424
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recordid: gale_ofa360118272
title: Fe-vacancy order and superconductivity in tetragonal [beta]-[Fe.sub.1-x]Se.(PHYSICS)(Report)(Author abstract)
format: Article
creator:
  • Chert, Ta - Kun
  • Chang, Chung - Chieh
  • Chang, Hsian - Hong
  • Fang, Ai - Hua
  • Wang, Chih - Han
  • Chao, Wei - Hsiang
  • Tseng, Chuan - Ming
  • Lee, Yung - Chi
  • Wu, Yu - Ruei
  • Wen, Min - Hsueh
  • Tang, Hsin - Yu
  • Chen, Fu - Rong
  • Wang, Ming - Jye
  • Wu, Maw - Kuen
  • Van Dyck, Dirk
subjects:
  • Iron (Metal) -- Electric Properties
  • Superconductivity -- Research
  • Selenium Compounds -- Electric Properties
  • Selenium Compounds -- Composition
  • Physics Research
ispartof: Proceedings of the National Academy of Sciences of the United States, Jan 7, 2014, Vol.111(1), p.63(6)
description: Several superconducting transition temperatures in the range of 30-46 K were reported in the recently discovered intercalated FeSe system ([A.sub.1-x][Fe.sub.2-y][Se.sub.2], A = K, Rb, Cs, TI). Although the superconducting phases were not yet conclusively decided, more than one magnetic phase with particular orders of iron vacancy and/or potassium vacancy were identified, and some were argued to be the parent phase. Here we show the discovery of the presence and ordering of iron vacancy in nonintercalated FeSe (PbO-type tetragonal [beta]-[Fe.sub.1-x]Se). Three types of iron-vacancy order were found through analytical electron microscopy, and one was identified to be non-superconducting and magnetic at low temperature. This discovery suggests that the rich-phases found in [A.sub.1-x][Fe.sub.2-y][Se.sub.2] are not exclusive in Fe-Se and related superconductors. In addition, the magnetic [beta]-[Fe.sub.1-x]Se phases with particular iron-vacancy orders are more likely to be the parent phase of the FeSe superconducting system instead of the previously assigned [beta]-[Fe.sub.1+[delta]]Te. magnetism | phase diagram www.pnas.org/cgi/doi/10.1073/pnas.1321160111
language: English
source:
identifier: ISSN: 0027-8424
fulltext: fulltext
issn:
  • 0027-8424
  • 00278424
url: Link


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titleFe-vacancy order and superconductivity in tetragonal [beta]-[Fe.sub.1-x]Se.(PHYSICS)(Report)(Author abstract)
creatorChert, Ta - Kun ; Chang, Chung - Chieh ; Chang, Hsian - Hong ; Fang, Ai - Hua ; Wang, Chih - Han ; Chao, Wei - Hsiang ; Tseng, Chuan - Ming ; Lee, Yung - Chi ; Wu, Yu - Ruei ; Wen, Min - Hsueh ; Tang, Hsin - Yu ; Chen, Fu - Rong ; Wang, Ming - Jye ; Wu, Maw - Kuen ; Van Dyck, Dirk
ispartofProceedings of the National Academy of Sciences of the United States, Jan 7, 2014, Vol.111(1), p.63(6)
identifierISSN: 0027-8424
subjectIron (Metal) -- Electric Properties ; Superconductivity -- Research ; Selenium Compounds -- Electric Properties ; Selenium Compounds -- Composition ; Physics Research
descriptionSeveral superconducting transition temperatures in the range of 30-46 K were reported in the recently discovered intercalated FeSe system ([A.sub.1-x][Fe.sub.2-y][Se.sub.2], A = K, Rb, Cs, TI). Although the superconducting phases were not yet conclusively decided, more than one magnetic phase with particular orders of iron vacancy and/or potassium vacancy were identified, and some were argued to be the parent phase. Here we show the discovery of the presence and ordering of iron vacancy in nonintercalated FeSe (PbO-type tetragonal [beta]-[Fe.sub.1-x]Se). Three types of iron-vacancy order were found through analytical electron microscopy, and one was identified to be non-superconducting and magnetic at low temperature. This discovery suggests that the rich-phases found in [A.sub.1-x][Fe.sub.2-y][Se.sub.2] are not exclusive in Fe-Se and related superconductors. In addition, the magnetic [beta]-[Fe.sub.1-x]Se phases with particular iron-vacancy orders are more likely to be the parent phase of the FeSe superconducting system instead of the previously assigned [beta]-[Fe.sub.1+[delta]]Te. magnetism | phase diagram www.pnas.org/cgi/doi/10.1073/pnas.1321160111
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titleFe-vacancy order and superconductivity in tetragonal [beta]-[Fe.sub.1-x]Se.(PHYSICS)(Report)(Author abstract)
descriptionSeveral superconducting transition temperatures in the range of 30-46 K were reported in the recently discovered intercalated FeSe system ([A.sub.1-x][Fe.sub.2-y][Se.sub.2], A = K, Rb, Cs, TI). Although the superconducting phases were not yet conclusively decided, more than one magnetic phase with particular orders of iron vacancy and/or potassium vacancy were identified, and some were argued to be the parent phase. Here we show the discovery of the presence and ordering of iron vacancy in nonintercalated FeSe (PbO-type tetragonal [beta]-[Fe.sub.1-x]Se). Three types of iron-vacancy order were found through analytical electron microscopy, and one was identified to be non-superconducting and magnetic at low temperature. This discovery suggests that the rich-phases found in [A.sub.1-x][Fe.sub.2-y][Se.sub.2] are not exclusive in Fe-Se and related superconductors. In addition, the magnetic [beta]-[Fe.sub.1-x]Se phases with particular iron-vacancy orders are more likely to be the parent phase of the FeSe superconducting system instead of the previously assigned [beta]-[Fe.sub.1+[delta]]Te. magnetism | phase diagram www.pnas.org/cgi/doi/10.1073/pnas.1321160111
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atitleFe-vacancy order and superconductivity in tetragonal [beta]-[Fe.sub.1-x]Se.(PHYSICS)(Report)(Author abstract)
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abstractSeveral superconducting transition temperatures in the range of 30-46 K were reported in the recently discovered intercalated FeSe system ([A.sub.1-x][Fe.sub.2-y][Se.sub.2], A = K, Rb, Cs, TI). Although the superconducting phases were not yet conclusively decided, more than one magnetic phase with particular orders of iron vacancy and/or potassium vacancy were identified, and some were argued to be the parent phase. Here we show the discovery of the presence and ordering of iron vacancy in nonintercalated FeSe (PbO-type tetragonal [beta]-[Fe.sub.1-x]Se). Three types of iron-vacancy order were found through analytical electron microscopy, and one was identified to be non-superconducting and magnetic at low temperature. This discovery suggests that the rich-phases found in [A.sub.1-x][Fe.sub.2-y][Se.sub.2] are not exclusive in Fe-Se and related superconductors. In addition, the magnetic [beta]-[Fe.sub.1-x]Se phases with particular iron-vacancy orders are more likely to be the parent phase of the FeSe superconducting system instead of the previously assigned [beta]-[Fe.sub.1+[delta]]Te. magnetism | phase diagram www.pnas.org/cgi/doi/10.1073/pnas.1321160111
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