126 citations · 384 across the 9 of their papers we have counts for
8 papers · 1 filter
Multiband behavior and non-metallic low-temperature state of KNaFeSe
Hyejin Ryu, F. Wolff-Fabris, J. B. Warren +3
We report evidence for multiband transport and an insulating low-temperature normal state in superconducting KNaFeSe with K. The…
Insulating and metallic spin glass in KFeNiSe (0.06 1.44) single crystals
Hyejin Ryu, Milinda Abeykoon, Kefeng Wang +6
We report electron doping effects by Ni in KFeNiSe (0.06 1.44) single crystal alloys. A rich ground state phase diagram is observed. S…
Nonmetallic Low-Temperature Normal State of K0.70Fe1.46Se1.85Te0.15
Kefeng Wang, Hyejin Ryu, Erik Kampert +4
The normal-state in-plane resistivity below the zero-field superconducting transition temperature and the upper critical field Hc2 were measured by suppressing superconductiv…
Physical properties of KxNi2-ySe2 single crystals
Hechang Lei, Kefeng Wang, Hyejin Ryu +3
We have synthesized K0.95(1)Ni1.86(2)Se2 single crystals. The single crystals contain K and Ni deficiencies not observed in KNi2Se2 polycrystals. Unlike KNi2Se2 polycrystals, the s…
Phase Diagram of KxFe2-ySe2-zSz and the Suppression of its Superconducting State by an Fe2-Se/S Tetrahedron Distortion
Hechang Lei, Milinda Abeykoon, Emil S. Bozin +3
We report structurally tuned superconductivity in KxFe2-ySe2-zSz (0<=z<=2) phase diagram. Superconducting Tc is suppressed as S is incorporated into the lattice, eventually vanishi…
Effects of excess Fe on upper critical field and magnetotransport in Fe1+y(Te1-xSx)z
Hechang Lei, Rongwei Hu, E. S. Choi +2
We have investigated the upper critical field anisotropy and magnetotransport properties of Fe1.14(1)Te0.91(2)S0.09(2) single crystals in stable magnetic fields up to 35 T. The res…