Physical properties of KxNi2-ySe2 single crystals

Title
Physical properties of KxNi2-ySe2 single crystals
Authors
류혜진Hechang LeiMilinda AbeykoonKefeng WangEmil S. BozinD. GrafJ. B. WarrenC. Petrovic
Issue Date
2014-01
Publisher
Journal of physics, Condensed matter : an Institute of Physics journal
Citation
VOL 26, NO 1-015701-7
Abstract
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 superconductivity is absent in single crystals. The detailed physical property study indicates that the K0.95Ni1.86Se2 single crystals exhibit heavy-fermion-like characteristics. The transition to a heavy fermion state below T similar to 30 K results in an enhancement of the electron-like carrier density whereas the magnetic susceptibility shows little anisotropy and suggests the presence of both itinerant and localized Ni orbitals.
URI
http://pubs.kist.re.kr/handle/201004/70296
ISSN
0953-8984
Appears in Collections:
KIST Publication > Article
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