Structural phase transition in TmxFe1-xSe0.85 (Tm = Mn and Cu) and its relation to superconductivity
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Date
2009-07-23
Journal Title
Journal ISSN
Volume Title
Publisher
arXivLabs
Abstract
In this letter, we report the results of detailed studies on Mn- and Cu-substitution to Fe-site of beta-FeSe, namely MnxFe1-xSe0.85 and CuxFe1-xSe0.85. 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 beta-FeSe.
Description
Keywords
Superconductivity, Phase transformations, Selenium, Iron, Crystal doping, Monoclinic lattices
Citation
Huang, T.-W., Chen, T.-K., Yeh, K.-W., Ke, C.-T., Chen, C. L., Huang, Y.-L., Hsu, F.-C., Wu, M.-K., Wu, P. M., Avdeev, M., & Studer, A. J. (2009).Structural phase transition in TmxFe1-xSe0.85 (Tm = Mn and Cu) and its relation to superconductivity. Arxiv Condensed Matter, arXiv:0907.4001. doi:arxiv.org/abs/0907.4001