Superconductivity tuned by the iron vacancy order in KxFe2-ySe2
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 | 027402 |
Journal / Publication | Chinese Physics Letters |
Volume | 30 |
Issue number | 2 |
Publication status | Published - Feb 2013 |
Externally published | Yes |
Link(s)
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
©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 journal › peer-review