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Microstructure and ordering of iron vacancies in the superconductor system KyFexSe2 as seen via transmission electron microscopy

Z. Wang, Y. J. Song, H. L. Shi, Z. W. Wang, Z. Chen, H. F. Tian, G. F. Chen, J. G. Guo, H. X. Yang, and J. Q. Li
Phys. Rev. B 83, 140505(R) – Published 13 April 2011; Erratum Phys. Rev. B 83, 139906 (2011)

Abstract

Structural investigations by means of transmission electron microscopy (TEM) on K0.8FexSe2 and KFexSe2, with 1.5 ⩽ x ⩽ 1.8, have revealed a rich variety of microstructure phenomena. Materials with 1.5 ⩽ x ⩽ 1.6 often show a superstructure modulation along the [310] zone-axis direction, and this modulation can be well interpreted by the Fe-vacancy order, which likely yields a superstructure phase of K2Fe4Se5. The superconducting K0.8FexSe2 and KFexSe2 (1.7 ⩽ x ⩽ 1.8) materials contain clear phase separation, in particular, along the c-axis direction, recognizable as visible parallel lamellae in the crystals; this fact suggests that the superconducting phase could have the Fe-vacancy disordered state.

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  • Received 8 March 2011
  • Corrected 20 April 2011

DOI:https://doi.org/10.1103/PhysRevB.83.140505

©2011 American Physical Society

Corrections

20 April 2011

Erratum

Publisher’s Note: Microstructure and ordering of iron vacancies in the superconductor system KyFexSe2 as seen via transmission electron microscopy [Phys. Rev. B 83, 140505(R) (2011)]

Z. Wang, Y. J. Song, H. L. Shi, Z. W. Wang, Z. Chen, H. F. Tian, G. F. Chen, J. G. Guo, H. X. Yang, and J. Q. Li
Phys. Rev. B 83, 139906 (2011)

Authors & Affiliations

Z. Wang1, Y. J. Song1, H. L. Shi1, Z. W. Wang1, Z. Chen1, H. F. Tian1, G. F. Chen2, J. G. Guo1, H. X. Yang1, and J. Q. Li1,*

  • 1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
  • 2Department of Physics, Renmin University of China, Beijing 100872, People's Republic of China

  • *Corresponding author: LJQ@aphy.iphy.ac.cn

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Issue

Vol. 83, Iss. 14 — 1 April 2011

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