Journal
PHYSICAL REVIEW B
Volume 89, Issue 18, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.89.184510
Keywords
-
Funding
- Leading Foreign Research Institute Recruitment Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Science, and Technology [2012K1A4A3053565]
- NRF of Korea [NRF-2011-0017079, 2013-R1A1A2-057535]
- Basic Science Research Program [NRF-2013R1A1A2009778]
- Leading Foreign Research Institute Recruitment Program [2012K1A4A3053565]
- National Research Foundation of Korea [2012K1A4A3053565, 21A20131100008, 2011-0017079, 2013R1A1A2057535] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Ask authors/readers for more resources
We report a study of the lattice dynamics in superconducting NaFeAs (T-c = 8 K) and doped NaFe0.97Co0.03As (T-c = 20 K) using Raman light scattering. Five of the six phonon modes expected from group theory are observed. In contrast with results obtained on isostructural and isoelectronic LiFeAs, anomalous broadening of E-g(As) and A(1g)(Na) modes upon cooling is observed in both samples. In addition, in the Co-doped sample, a superconductivity- induced renormalization of the frequency and linewidth of the B-1g (Fe) vibration is observed. This renormalization cannot be understood within a single band and simple multiband approaches. A theoretical model that includes the effects of spin-density wave correlations along with sign-changing s-wave pairing state and interband scattering has been developed to explain the observed behavior of the B-1g (Fe) mode.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available
Share Paper
