Retention of the Tetragonal to Orthorhombic Structural Transition in F-Substituted SmFeAsO: A New Phase Diagram for $\mathrm{SmFeAs}({\mathrm{O}}_{1\ensuremath{-}x}{\mathrm{F}}_{x})$

Retention of the Tetragonal to Orthorhombic Structural Transition in F-Substituted SmFeAsO: A New Phase Diagram for $SmFeAs (O_{1 - x} F_{x})$

A. Martinelli, A. Palenzona, M. Tropeano, M. Putti, C. Ferdeghini, G. Profeta, and E. Emerich

Phys. Rev. Lett. 106, 227001 – Published 1 June 2011

Abstract

In this Letter we propose a new phase diagram for the $SmFeAs (O_{1 - x} F_{x})$ system, based on careful analysis of synchrotron powder diffraction data, SQUID, and muon spin rotation measurements. The tetragonal to orthorhombic structural transition is slightly affected by F content and is retained for the superconducting samples, even at optimal doping. These findings relate the AFM transition on a different ground with respect to the structural one and suggests that orbital ordering could be the driving force for symmetry breaking.

Received 8 February 2011

DOI:https://doi.org/10.1103/PhysRevLett.106.227001

Authors & Affiliations

A. Martinelli¹, A. Palenzona¹, M. Tropeano¹, M. Putti^1,2, C. Ferdeghini¹, G. Profeta³, and E. Emerich⁴

¹SPIN-CNR, corso Perrone 24, 16152 Genova, Italy
²Dipartimento di Fisica, Università di Genova, via Dodecaneso 33, 16146 Genova, Italy
³CNR and Dipartimento di Fisica, Università de L’Aquila, Via Vetoio, 10 I-67010 Coppito, Italy
⁴SNBL at ESRF, 6 rue Jules Horrowitz, 38043 Grenoble, France

Comments & Replies

Comment on “Retention of the Tetragonal to Orthorhombic Structural Transition in F-Substituted SmFeAsO: A New Phase Diagram for $SmFeAs (O_{1 − x} F_{x})$ ”

C. R. Rotundu

Phys. Rev. Lett. 110, 209701 (2013)

Martinelli et al. Reply:

A. Martinelli, A. Palenzona, M. Putti, C. Ferdeghini, and G. Profeta

Phys. Rev. Lett. 110, 209702 (2013)

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Vol. 106, Iss. 22 — 3 June 2011

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Physical Review Letters

Retention of the Tetragonal to Orthorhombic Structural Transition in F-Substituted SmFeAsO: A New Phase Diagram for SmFeAs(O1−xFx)

A. Martinelli, A. Palenzona, M. Tropeano, M. Putti, C. Ferdeghini, G. Profeta, and E. Emerich

Phys. Rev. Lett. 106, 227001 – Published 1 June 2011

Abstract

Authors & Affiliations

Comments & Replies

Comment on “Retention of the Tetragonal to Orthorhombic Structural Transition in F-Substituted SmFeAsO: A New Phase Diagram for SmFeAs(O1−xFx)”

C. R. Rotundu

Phys. Rev. Lett. 110, 209701 (2013)

Martinelli et al. Reply:

A. Martinelli, A. Palenzona, M. Putti, C. Ferdeghini, and G. Profeta

Phys. Rev. Lett. 110, 209702 (2013)

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Retention of the Tetragonal to Orthorhombic Structural Transition in F-Substituted SmFeAsO: A New Phase Diagram for $SmFeAs (O_{1 - x} F_{x})$

Comment on “Retention of the Tetragonal to Orthorhombic Structural Transition in F-Substituted SmFeAsO: A New Phase Diagram for $SmFeAs (O_{1 − x} F_{x})$ ”