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10 papers · 2 filters
Spin-state transition in the Fe-pnictides
H. Gretarsson, S. R. Saha, T. Drye +7
We report a Fe Kβx-ray emission spectroscopy study of local magnetic moments in the rare-earth doped iron pnictide Ca_{1-x}RE_xFe_2As_2 (RE=La, Pr, and Nd). In all samples studied…
High-pressure effects on single crystals electron-doped rCeCuO
C. R. Rotundu, V. V. Struzhkin, M. S. Somayazulu +3
We present high pressure diamond anvil cell synchrotron X-ray, resistivity, and ac-susceptibility measurements on electron-doped cuprate PrCeCuO to much higher…
Phase relations in K_xFe_{2-y}Se_2 and the structure of superconducting K_xFe_2Se_2 via high-resolution synchrotron diffraction
Daniel P. Shoemaker, Duck Young Chung, Helmut Claus +4
Superconductivity in iron selenides has experienced a rapid growth, but not without major inconsistencies in the reported properties. For alkali-intercalated iron selenides, even t…
Phase diagram of Josephson junction between s and s+- superconductors in dirty limit
A. E. Koshelev
The s+- state in which order parameter has different signs in different bands is a leading candidate for the superconducting state in the iron based superconductors. We investigate…
Anomalous proximity effects at the interface of s and s+- superconductors
Valentin G. Stanev, Alexei E. Koshelev
We study proximity effects close to a boundary between s and s+- superconductors. Frustration, caused by interaction of the s-wave gap parameter with the opposite-sign gaps of s+-…
Phase Diagram of Ba1-xKxFe2As2
Sevda Avci, Omar Chmaissem, Duck-Young Chung +10
We report the results of a systematic investigation of the phase diagram of the iron-based superconductor, Ba1-xKxFe2As2, from x = 0 to x = 1.0 using high resolution neutron and x-…