Phase separation and superconductivity in Fe1+xTe0.5Se0.5

Vikas Bhatia; Efrain E. Rodriguez; Nicholas P. Butch; Johnpierre Paglione; Mark A. Green

doi:10.1039/C1CC13878B

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Phase separation and superconductivity in Fe₁₊xTe_0.5Se_0.5†

Vikas Bhatia,^a Efrain E. Rodriguez,^b Nicholas P. Butch,^c Johnpierre Paglione^c and Mark A. Green*^ab

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* Corresponding authors

^a Department of Materials Science and Engineering, University of Maryland, College Park, USA
E-mail: mark.green@nist.gov

^b NIST Center for Neutron Research, National Institute of Standards and technology, 100 Bureau Drive, Gaithersburg, USA

^c Center for Nanophysics and Advance Materials, University of Maryland, College Park, USA

Abstract

Fe₁₊xTe_0.5Se_0.5 is the archetypical iron-based superconductor. Here we show that the superconducting state is controlled by the stacking of its anti-PbO layers, such that homogeneous ordering hinders superconductivity and the highest volume fractions are observed in phase separated structures as evidenced by either a distribution of lattice parameters or microstrain.

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Article information

DOI: https://doi.org/10.1039/C1CC13878B
Article type: Communication
Submitted: 29 Jun 2011
Accepted: 05 Sep 2011
First published: 19 Sep 2011

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Chem. Commun., 2011,47, 11297-11299

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Phase separation and superconductivity in Fe₁₊xTe_0.5Se_0.5

V. Bhatia, E. E. Rodriguez, N. P. Butch, J. Paglione and M. A. Green, Chem. Commun., 2011, 47, 11297 DOI: 10.1039/C1CC13878B

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