A Novel Large Moment Antiferromagnetic Order in K0.8Fe1.6Se2Superconductor

Bao, Wei and Huang, Qing-Zhen and Chen, Gen-Fu and Wang, Du-Ming and He, Jun-Bao and Qiu, Yi-Ming and Green, M.A. (2011) A Novel Large Moment Antiferromagnetic Order in K0.8Fe1.6Se2Superconductor. Chinese Physics Letters, 28 (8). 086104. ISSN 0256-307X. (doi:https://doi.org/10.1088/0256-307X/28/8/086104) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Official URL
http://doi.org/10.1088/0256-307X/28/8/086104

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 ?B/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.

Item Type: Article
Subjects: Q Science > QC Physics > QC173.45 Condensed Matter
Q Science > QD Chemistry > QD478 Solid State Chemistry
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Giles Tarver
Date Deposited: 19 Oct 2015 13:59 UTC
Last Modified: 20 Oct 2015 08:10 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/51079 (The current URI for this page, for reference purposes)
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