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자연과학대학
물리학전공
Journal papers
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Pressure-induced metal–insulator transitions in chalcogenide NiS2-xSex
Title
Pressure-induced metal–insulator transitions in chalcogenide NiS2-xSex
Authors
Hussain T.
;
Oh M.-J.
;
Nauman M.
;
Jo Y.
;
Han G.
;
Kim C.
;
Kang W.
Ewha Authors
강원
SCOPUS Author ID
강원
Issue Date
2018
Journal Title
Physica B: Condensed Matter
ISSN
0921-4526
Citation
Physica B: Condensed Matter vol. 536, pp. 235 - 238
Keywords
Magnetic measurements
;
Magnetic phase transition
;
Metal–insulator transition (MIT)
;
NiS1.9Se0.1
;
Non-Fermi-liquid behavior
;
ρ(T) measurements
Publisher
Elsevier B.V.
Indexed
SCIE; SCOPUS
Document Type
Article
Abstract
We report the temperature-dependent resistivity ρ(T) of chalcogenide NiS2-xSex (x = 0.1) using hydrostatic pressure as a control parameter in the temperature range of 4–300 K. The insulating behavior of ρ(T) survives at low temperatures in the pressure regime below 7.5 kbar, whereas a clear insulator-to-metallic transition is observed above 7.5 kbar. Two types of magnetic transitions, from the paramagnetic (PM) to the antiferromagnetic (AFM) state and from the AFM state to the weak ferromagnetic (WF) state, were evaluated and confirmed by magnetization measurement. According to the temperature–pressure phase diagram, the WF phase survives up to 7.5 kbar, and the transition temperature of the WF transition decreases as the pressure increases, whereas the metal–insulator transition temperature increases up to 9.4 kbar. We analyzed the metallic behavior and proposed Fermi-liquid behavior of NiS1.9Se0.1. © 2017 Elsevier B.V.
DOI
10.1016/j.physb.2017.11.032
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