PhysRevB.80.052508.pdf (560.3 kB)
Suppression of the superconducting transition of R FeAsO1-x Fx (R=Tb, Dy, and Ho)
journal contribution
posted on 2015-04-24, 13:59 authored by Jennifer A. Rodgers, George B.S. Penny, Andrea Marcinkova, Jan-Willem G. Bos, Dmitry A. Sokolov, Anna KusmartsevaAnna Kusmartseva, Andrew D. Huxley, J. Paul AttfieldA 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.
Funding
We acknowledge EPSRC, the Royal Society of Edinburgh and the Leverhulme trust for support.
History
School
- Science
Department
- Physics
Published in
Physical Review B - Condensed Matter and Materials PhysicsVolume
80Issue
5Citation
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.Publisher
© American Physical SocietyVersion
- VoR (Version of Record)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Publication date
2009Notes
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.ISSN
1098-0121eISSN
1550-235XPublisher version
Language
- en