Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/344791
Type: Artigo
Title: Nematic fluctuations and phase transitions in LaFeAsO: a Raman scattering study
Author: Kaneko, U. F.
Gomes, P. F.
García-Flores, A. F.
Yan, J.-Q.
Lograsso, T. A.
Barberis, G. E.
Vaknin, D.
Granado, E.
Abstract: Raman scattering experiments on LaFeAsO with distinct antiferromagnetic (T-AFM = 140 K) and tetragonal-orthorhombic (T-S = 155 K) transitions show a quasielastic peak (QEP) in B-2g symmetry (2 Fe tetragonal cell) that fades away below similar to T-AFM and is ascribed to electronic nematic fluctuations. A scaling of the reported shear modulus with the T dependence of the QEP height rather than the QEP area indicates that magnetic degrees of freedom drive the structural transition. The large separation between T-S and T-AFM in LaFeAsO compared to BaFe2As2 manifests itself in slower dynamics of nematic fluctuations in the former.
Subject: Supercondutores - Materiais
Supercondutividade
Supercondutores à base de ferro
Superconductors - Materials
Superconductivity
Iron-based superconductors
Country: Estados Unidos
Editor: American Physical Society
Rights: aberto
Identifier DOI: 10.1103/PhysRevB.96.014506
Address: https://journals.aps.org/prb/abstract/10.1103/PhysRevB.96.014506
Date Issue: 2017
Appears in Collections:IFGW - Artigos e Outros Documentos

Files in This Item:
File SizeFormat 
000405183000005.pdf709.53 kBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.