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)

  • Guan-Nan Li (李冠男)
  • Qing-Zhen Huang (黄清镇)
  • Gen-Fu Chen (陈根富)
  • Jun-Bao He (何俊宝)
  • Du-Ming Wang (王笃明)
  • M. A. Green
  • Yi-Ming Qiu (邱义铭)
  • Jian-Lin Luo (雒建林)
  • Mei-Mei Wu (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.  

Citation Format(s)

Superconductivity tuned by the iron vacancy order in KxFe2-ySe2. / Bao (鲍威), Wei; Li (李冠男), Guan-Nan; Huang (黄清镇), Qing-Zhen; Chen (陈根富), Gen-Fu; He (何俊宝), Jun-Bao; Wang (王笃明), Du-Ming; Green, M. A.; Qiu (邱义铭), Yi-Ming; Luo (雒建林), Jian-Lin; Wu (武梅梅), Mei-Mei.

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