Superconductivity tuned by the iron vacancy order in KxFe2-ySe2

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • LI Guan-Nan (李冠男)
  • HUANG Qing-Zhen (黄清镇)
  • CHEN Gen-Fu (陈根富)
  • HE Jun-Bao (何俊宝)
  • WANG Du-Ming (王笃明)
  • M. A. Green
  • QIU Yi-Ming (邱义铭)
  • LUO Jian-Lin (雒建林)
  • WU Mei-Mei (武梅梅)

Detail(s)

Original languageEnglish
Article number027402
Journal / PublicationChinese Physics Letters
Volume30
Issue number2
Publication statusPublished - Feb 2013
Externally publishedYes

Abstract

Combining in-depth neutron diffraction and systematic bulk studies, we discover that the 5 × 5 Fe vacancy order, with its associated block antiferromagnetic order, is the ground state with varying occupancy ratios of the iron 16i and vacancy 4d sites across the phase-diagram of KxFe2-ySe2 . The orthorhombic order, with one of the four Fe sites vacant, appears only at intermediate temperatures as a competing phase. The material experiences an insulator to metal crossover when the  √5 × √5 order is highly developed. Superconductivity occurs in such a metallic phase.  

©2013 Chinese Physical Society and IOP Publishing Ltd

Citation Format(s)

Superconductivity tuned by the iron vacancy order in KxFe2-ySe2. / BAO Wei (鲍威); LI Guan-Nan (李冠男); HUANG Qing-Zhen (黄清镇) et al.

In: Chinese Physics Letters, Vol. 30, No. 2, 027402, 02.2013.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review