Synthesis and characterization of the layered iron-selenide Na0.8Fe1.6Se2

Y. J. Long, D. M. Wang, Z. Wang, H. X. Yang, J. B. He, L. X. Zhao, P. P. Wang, M. Q. Xue, J. Q. Li, Z. A. Ren, and G. F. Chen
Phys. Rev. B 90, 144519 – Published 30 October 2014

Abstract

An iron-selenide Na0.8Fe1.6Se2 single crystal has been successfully synthesized using a self-flux method. The electrical resistivity measurement shows that this material exhibits semiconducting behavior in the whole temperature range, with an anomalous increment of resistivity at Ts595 K. By varying the concentrations of Na and Fe, a small volume of superconducting phase could be achieved with a critical temperature of Tc34 K. Structural characterization shows that, similarly to K0.8Fe1.6Se2, the Na0.8Fe1.6Se2 phase exhibits clear superstructure with a modulation wave vector of q=(3/5,1/5,0) caused by the Fe-vacancy order within the a-b plane.

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  • Received 16 September 2014
  • Revised 15 October 2014

DOI:https://doi.org/10.1103/PhysRevB.90.144519

©2014 American Physical Society

Authors & Affiliations

Y. J. Long1,2, D. M. Wang1, Z. Wang2, H. X. Yang2, J. B. He1, L. X. Zhao2, P. P. Wang2, M. Q. Xue2, J. Q. Li2,3, Z. A. Ren2,3, and G. F. Chen1,2,3,*

  • 1Department of Physics, Renmin University of China, Beijing 100872, China
  • 2Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 3Collaborative Innovation Center of Quantum Matter, Beijing 100190, China

  • *gfchen@aphy.iphy.ac.cn

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Vol. 90, Iss. 14 — 1 October 2014

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