A novel large moment antiferromagnetic order in K0.8Fe1.6Se2 superconductor

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

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Author(s)

  • Qing-Zhen HUANG (黄清镇)
  • Gen-Fu CHEN (陈根富)
  • M. A. Green
  • Du-Ming WANG (王笃明)
  • Jun-Bao HE (何俊宝)
  • Yi-Ming QIU (邱义铭)

Detail(s)

Original languageEnglish
Article number086104
Journal / PublicationChinese Physics Letters
Volume28
Issue number8
Publication statusPublished - Aug 2011
Externally publishedYes

Abstract

The discovery of cuprate high TC superconductors has inspired the search for unconventional superconductors in magnetic materials. A successful recipe has been to suppress long-range order in a magnetic parent compound by doping or high pressure to drive the material towards a quantum critical point. We report an exception to this rule in the recently discovered potassium iron selenide. The superconducting composition is identified as the iron vacancy ordered K0.83(2)Fe1.64(1)Se2 with TC above 30 K. A novel large moment 3.31 μB /Fe antiferromagnetic order that conforms to the tetragonal crystal symmetry has an unprecedentedly high ordering temperature TN 559 K for a bulk superconductor. Staggeringly polarized electronic density of states is thus suspected, which would stimulate further investigation into superconductivity in a strong spin-exchange field under new circumstances. 

Citation Format(s)

A novel large moment antiferromagnetic order in K0.8Fe1.6Se2 superconductor. / BAO (鲍威), Wei; HUANG (黄清镇), Qing-Zhen; CHEN (陈根富), Gen-Fu; M. A. Green; WANG (王笃明), Du-Ming; HE (何俊宝), Jun-Bao; QIU (邱义铭), Yi-Ming.

In: Chinese Physics Letters, Vol. 28, No. 8, 086104, 08.2011.

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