Pressure-induced metal–insulator transitions in chalcogenide NiS2-xSex

Tayyaba Hussain; Myeong jun Oh; Muhammad Nauman; Younjung Jo; Garam Han; Changyoung Kim; Woun Kang

doi:10.1016/j.physb.2017.11.032

Pressure-induced metal–insulator transitions in chalcogenide NiS_2-xSe_x

Tayyaba Hussain, Myeong jun Oh, Muhammad Nauman, Younjung Jo, Garam Han, Changyoung Kim, Woun Kang

Department of Physics

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

We report the temperature-dependent resistivity ρ(T) of chalcogenide NiS_2-xSe_x (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 NiS_1.9Se_0.1.

Original language	English
Pages (from-to)	235-238
Number of pages	4
Journal	Physica B: Condensed Matter
Volume	536
DOIs	https://doi.org/10.1016/j.physb.2017.11.032
State	Published - 1 May 2018

Bibliographical note

Publisher Copyright:
© 2017 Elsevier B.V.

Keywords

Magnetic measurements
Magnetic phase transition
Metal–insulator transition (MIT)
NiSSe
Non-Fermi-liquid behavior
ρ(T) measurements

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10.1016/j.physb.2017.11.032

Cite this

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title = "Pressure-induced metal–insulator transitions in chalcogenide NiS2-xSex ",

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.",

keywords = "Magnetic measurements, Magnetic phase transition, Metal–insulator transition (MIT), NiSSe, Non-Fermi-liquid behavior, ρ(T) measurements",

author = "Tayyaba Hussain and Oh, \{Myeong jun\} and Muhammad Nauman and Younjung Jo and Garam Han and Changyoung Kim and Woun Kang",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier B.V.",

year = "2018",

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doi = "10.1016/j.physb.2017.11.032",

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T1 - Pressure-induced metal–insulator transitions in chalcogenide NiS2-xSex

AU - Hussain, Tayyaba

AU - Oh, Myeong jun

AU - Nauman, Muhammad

AU - Jo, Younjung

AU - Han, Garam

AU - Kim, Changyoung

AU - Kang, Woun

PY - 2018/5/1

Y1 - 2018/5/1

N2 - 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.

AB - 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.

KW - Magnetic measurements

KW - Magnetic phase transition

KW - Metal–insulator transition (MIT)

KW - NiSSe

KW - Non-Fermi-liquid behavior

KW - ρ(T) measurements

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DO - 10.1016/j.physb.2017.11.032

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