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Title: Suppression of the superconducting transition of R FeAsO1-x Fx (R=Tb, Dy, and Ho)
Authors: Rodgers, Jennifer A.
Penny, George B.S.
Marcinkova, Andrea
Bos, Jan-Willem G.
Sokolov, Dmitry A.
Kusmartseva, Anna F.
Huxley, Andrew D.
Attfield, J. Paul
Issue Date: 2009
Publisher: © American Physical Society
Citation: RODGERS, J.A. ... et al, 2009. Suppression of the superconducting transition of R FeAsO1-x Fx (R=Tb, Dy, and Ho). Physical Review B - Condensed Matter and Materials Physics, 80 (5), 052508.
Abstract: A suppression of superconductivity in the late rare-earth R FeAsO1-x Fx materials is reported. The maximum critical temperature (Tc) decreases from 51 K for R=Tb to 36 K for HoFeAsO0.9 F0.1, which has been synthesized under 10 GPa pressure. This suppression is driven by a decrease in the Fe-As-Fe angle below an optimum value of 110.6°, as the angle decreases linearly with unit-cell volume (V) across the R FeAsO1-x Fx series. A crossover in electronic structure around this optimum geometry is evidenced by a change in sign of the compositional d Tc /dV, from negative values for previously reported large R materials to positive for HoFeAsO0.9 F0.1. © 2009 The American Physical Society.
Description: This article was published in the journal, Physical Review B [© American Physical Society]. It is also available at: http://dx.doi.org/10.1103/PhysRevB.80.052508.
Sponsor: We acknowledge EPSRC, the Royal Society of Edinburgh and the Leverhulme trust for support.
Version: Published
DOI: 10.1103/PhysRevB.80.052508
URI: https://dspace.lboro.ac.uk/2134/17363
Publisher Link: http://dx.doi.org/10.1103/PhysRevB.80.052508
ISSN: 1098-0121
Appears in Collections:Published Articles (Physics)

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