John B. Warren

collaborators

3 papers

cond-mat.supr-con2016

Multiband behavior and non-metallic low-temperature state of K $_{0.50}$ Na $_{0.24}$ Fe $_{1.52}$ Se $_{2}$

Hyejin Ryu, F. Wolff-Fabris, J. B. Warren +3

We report evidence for multiband transport and an insulating low-temperature normal state in superconducting K $_{0.50}$ Na $_{0.24}$ Fe $_{1.52}$ Se $_{2}$ with $T_{c} \approx 20$ K. The…

cond-mat.supr-con2016

Insulating and metallic spin glass in K $_{x}$ Fe $_{2 - δ - y}$ Ni $_{y}$ Se $_{2}$ (0.06 $\leq$ $y$ $\leq$ 1.44) single crystals

Hyejin Ryu, Milinda Abeykoon, Kefeng Wang +6

We report electron doping effects by Ni in K $_{x}$ Fe $_{2 - δ - y}$ Ni $_{y}$ Se $_{2}$ (0.06 $\leq$ $y$ $\leq$ 1.44) single crystal alloys. A rich ground state phase diagram is observed. S…

cond-mat.supr-con2012

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…

Multiband behavior and non-metallic low-temperature state of K0.50​Na0.24​Fe1.52​Se2​

Insulating and metallic spin glass in Kx​Fe2−δ−y​Niy​Se2​ (0.06 ≤ y ≤ 1.44) single crystals

Physical properties of KxNi2-ySe2 single crystals

Multiband behavior and non-metallic low-temperature state of K $_{0.50}$ Na $_{0.24}$ Fe $_{1.52}$ Se $_{2}$

Insulating and metallic spin glass in K $_{x}$ Fe $_{2 - δ - y}$ Ni $_{y}$ Se $_{2}$ (0.06 $\leq$ $y$ $\leq$ 1.44) single crystals