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 journal › peer-review
Author(s)
Detail(s)
Original language | English |
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Article number | 086104 |
Journal / Publication | Chinese Physics Letters |
Volume | 28 |
Issue number | 8 |
Publication status | Published - Aug 2011 |
Externally published | Yes |
Link(s)
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.
©2011 Chinese Physical Society and IOP Publishing Ltd
©2011 Chinese Physical Society and IOP Publishing Ltd
Citation Format(s)
A novel large moment antiferromagnetic order in K0.8Fe1.6Se2 superconductor. / BAO Wei (鲍威); HUANG Qing-Zhen (黄清镇); CHEN Gen-Fu (陈根富) et al.
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 journal › peer-review