Ultrafast structural dynamics of the orthorhombic distortion in the Fe-pnictide parent compound BaFe2As2.
Struct Dyn
; 3(2): 023611, 2016 Mar.
Article
em En
| MEDLINE
| ID: mdl-27158636
ABSTRACT
Using femtosecond time-resolved hard x-ray diffraction, we investigate the structural dynamics of the orthorhombic distortion in the Fe-pnictide parent compound BaFe2As2. The orthorhombic distortion analyzed by the transient splitting of the (1 0 3) Bragg reflection is suppressed on an initial timescale of 35 ps, which is much slower than the suppression of magnetic and nematic order. This observation demonstrates a transient state with persistent structural distortion and suppressed magnetic/nematic order which are strongly linked in thermal equilibrium. We suggest a way of quantifying the coupling between structural and nematic degrees of freedom based on the dynamics of the respective order parameters.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Struct Dyn
Ano de publicação:
2016
Tipo de documento:
Article
País de afiliação:
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