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research article
Normal state bottleneck and nematic fluctuations from femtosecond quasiparticle relaxation dynamics in Sm(Fe,Co)AsO
2013
We investigate temperature and fluence dependent dynamics of the photoexcited quasiparticle relaxation and low-energy electronic structure in electron-doped 1111-structure Sm(Fe0.93Co0.07)AsO single crystal. We find that the behavior is qualitatively identical to the 122-structure Ba(Fe,Co)(2)As-2 including the presence of a normal state pseudogap and a marked twofold symmetry breaking in the tetragonal phase that we relate to the electronic nematicity. The twofold symmetry breaking appears to be a general feature of the electron-doped iron pnictides.
Type
research article
Web of Science ID
WOS:000319729000004
Authors
Mertelj, T.
•
Stojchevska, L.
•
Zhigadlo, N. D.
•
Karpinski, J.
•
Mihailovic, D.
Publication date
2013
Publisher
Published in
Volume
87
Issue
17
Article Number
174525
Peer reviewed
REVIEWED
EPFL units
Available on Infoscience
October 1, 2013
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