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Exploration of iron-chalcogenide superconductors
ChiHeng Dong, Hangdong Wang, Minghu Fang
Iron-chalcogenide compounds with FeSe(Te, S) layers did not attract much attention until the discovery of high-Tc superconductivity (SC) in the iron-pnictide compounds at the begin…
Superconductivity and Disorder Effect in TlNiSeS crystals
Hangdong Wang, Chiheng Dong, Qianhui Mao +6
After our first discovery of superconductivity (SC) with =3.7 K in TlNiSe, we grew successfully a series of TlNiSeS (0.0 x 2.0) single cry…
Magnetic properties in layered (K, Rb and Cs)Co2Se2 with ThCr2Si2_type structure
Jinhu Yang, Bin Chen, Hangdong Wang +4
The magnetic properties of ThCr_2Si_2-type single crystals ACo_2Se_2 (A = K, Rb and Cs) have been investigated by magnetic susceptibility and isothermal magnetization measurements…
Multiband Superconductivity of Heavy Electrons in TlNi2Se2 single crystal
Hangdong Wang, Chiheng Dong, Qianhui Mao +7
Superconductivity has been first observed in TlNiSe at T=3.7 K and appears to involve heavy electrons with an effective mass =1420 , as inferred from th…
Neutron Scattering Study on Spin Dynamics in Superconducting (Tl,Rb)2Fe4Se5
Songxue Chi, Feng Ye, Wei Bao +7
We observed in superconducting (Tl,Rb)2Fe4Se5 spin-wave branches that span an energy range from 6.5 to 209 meV. Spin dynamics are successfully described by a Heisenberg localized s…