Superconductivity tuned by the iron vacancy order in KxFe 2-ySe2

Bao, W. and Li, G.-N. and Huang, Q.-Z. and Chen, G.-F. and He, J.-B. and Wang, D.-M. and Green, M.A. and Qiu, Y.-M. and Luo, J.-L. and Wu, M.-M. (2013) Superconductivity tuned by the iron vacancy order in KxFe 2-ySe2. Chinese Physics Letters, 30 (2). 0-0. ISSN 0256307X (ISSN). (doi:https://doi.org/10.1088/0256-307X/30/2/027402) (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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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 K xFe2-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.

Item Type: Article
Additional information: Unmapped bibliographic data: C7 - 027402 [EPrints field already has value set] LA - English [Field not mapped to EPrints] J2 - Chin. Phys. Lett. [Field not mapped to EPrints] AD - Department of Physics, Renmin University of China, Beijing 100872, China [Field not mapped to EPrints] AD - NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD 20899, United States [Field not mapped to EPrints] AD - Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China [Field not mapped to EPrints] AD - Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742, United States [Field not mapped to EPrints] AD - Neutron Scattering Laboratory, China Institute of Atomic Energy, Beijing 102413, China [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints]
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: 14 Oct 2015 11:21 UTC
Last Modified: 14 Oct 2015 11:21 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/50961 (The current URI for this page, for reference purposes)
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