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Title: Doping-driven structural phase transition and loss of superconductivity in MxFe1−xSeδ (M=Mn, Cu).
Authors: Huang, TW
Chen, TK
Yeh, KW
Ke, CT
Chen, CL
Huang, YL
Hsu, FC
Wu, MK
Wu, PM
Avdeev, M
Studer, AJ
Keywords: Phase Transformations
Neutron Diffraction
Issue Date: 2-Sep-2010
Publisher: American Physical Society
Citation: Huang, T. W., Chen, T. K., Yeh, K. W., Ke, C. T., Chen, C. L., Huang, Y. L., et al. (2010). Doping-driven structural phase transition and loss of superconductivity in MxFe1−xSeδ (M=Mn, Cu). Physical Review B, 82(10), 104502.
Abstract: In this paper, we report the results of detailed studies on Mn and Cu substitution to Fe site of β-FeSe, namely, MnxFe1−xSe1−δ and CuxFe1−xSe1−δ (δ equals to 0.03–0.05 based on our neutron-diffraction refinements). The results show that with only 10 at. % Cu doping the compound becomes a Mott insulator. Detailed temperature-dependent structural analyses of these Mn- and Cu-substituted compounds show that the structural transition, which is associated with the changes in the building block FeSe4 tetrahedron, is essential to the occurrence of superconductivity in β-FeSe. © 2010, American Physical Society
ISSN: 1098-0121
Appears in Collections:Journal Articles

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