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강상관계 물질 연구단
강상관계 물질 연구단
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Pressure-induced metal-insulator transitions in chalcogenide NiS2-xSex

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Title
Pressure-induced metal-insulator transitions in chalcogenide NiS2-xSex
Author(s)
Tayyaba Hussain; Myeong-jun Oh; Muhammad Nau; Younjung Jo; Garam Han; Changyoung Kim; Woun Kang
Publication Date
2018-05
Journal
PHYSICA B-CONDENSED MATTER, v.536, no., pp.235 - 238
Publisher
ELSEVIER SCIENCE BV
Abstract
We report the temperature-dependent resistivity rho(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.(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. All rights reserved. MARK
URI
https://pr.ibs.re.kr/handle/8788114/6540
ISSN
0921-4526
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > Journal Papers (저널논문)
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