Spin Susceptibility, Phase Diagram, and Quantum Criticality in the Electron-Doped High Tc Superconductor Ba(Fe1-xCox)2As2
Journal Article
·
· Journal of the Physical Society of Japan
- McMaster University
- ORNL
We report a systematic investigation of Ba(Fe1��xCox)2As2 based on transport and 75As NMR measurements, and establish the electronic phase diagram. We demonstrate that doping progressively suppresses the uniform spin susceptibility and low frequency spin fluctuations. The optimum superconducting phase emerges at xc ~ 0.08 from a non-Fermi-liquid which exhibits T-linear resistivity. Our findings point toward the presence of a quantum critical point near xc between the SDW (spin density wave) and superconducting phases.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC05-00OR22725
- OSTI ID:
- 965851
- Journal Information:
- Journal of the Physical Society of Japan, Vol. 78, Issue 1; ISSN 0031-9015
- Country of Publication:
- United States
- Language:
- English
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