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Granularity and vortex dynamics in LaO_0.92F_0.08FeAs as probed by harmonics of the AC magnetic susceptibility
Maria G. Adesso, Danilo Zola, Jianlin Luo +6
Fundamental and higher harmonics of the AC magnetic susceptibility have been measured on a LaO_0.92F_0.08FeAs sample as a function of the temperature, at various amplitudes and fre…
The crystalline electric field as a probe for long range antiferromagnetic order and superconductivity in CeFeAsOF
Songxue Chi, D. T. Adroja, T. Guidi +10
We use inelastic neutron scattering to study the crystalline electric field (CEF) excitations of Ce in CeFeAsOF(). For nonsuperconducting CeFeAsO, th…
Fermi Surface and Band Renormalization in (Sr,K)FeAs Superconductor from Angle-Resolved Photoemission Spectroscopy
Haiyun Liu, Wentao Zhang, Lin Zhao +16
High resolution angle-resolved photoemission measurements have been carried out on (Sr,K)FeAs superconductor (Tc=21 K). Three hole-like Fermi surface sheets are clearly res…
Probing superconducting energy gap from infrared spectroscopy on a BaKFeAs single crystal with T=37 K
G. Li, W. Z. Hu, J. Dong +5
We performed optical spectroscopy measurement on a superconducting BaKFeAs single crystal with T=37 K. Formation of the superconducting energy gaps in t…
Scanning tunneling microscopy of the 32 K superconductor (Sr1-xKx)Fe2As2
M. C. Boyer, Kamalesh Chatterjee, W. D. Wise +4
The discovery of high temperature superconductivity in La[O1-xFx]FeAs at the beginning of this year [1] has generated much excitement and has led to the rapid discovery of similar…
Structural and magnetic phase diagram of CeFeAsO1-xFx and its relationship to high-temperature superconductivity
Jun Zhao, Q. Huang, Clarina de la Cruz +10
We use neutron scattering to study the structural and magnetic phase transitions in the iron pnictides CeFeAsO1-xFx as the system is tuned from a semimetal to a high-transition-tem…