Spin and charge dynamics in 2D metal-insulator transition oxides: (Pr,Sr)2NiO4 and Sr2(Ru,Ir)O4

S. A. Carter; S. W. Cheong; B. Batlogg; R. J. Cava; C. H. Chen; J. J. Krajewski; W. F. Peck; L. W. Rupp

doi:10.1016/0921-4526(94)00607-W

Spin and charge dynamics in 2D metal-insulator transition oxides: (Pr,Sr)₂NiO₄ and Sr₂(Ru,Ir)O₄

S. A. Carter, S. W. Cheong, B. Batlogg, R. J. Cava, C. H. Chen, J. J. Krajewski, W. F. Peck, L. W. Rupp

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Abstract

The insulating and metallic states of metal-insulator transition (MIT) compounds with the K₂NiF₄-type structure have been studied through resistivity, heat capacity and magnetic susceptibility measurements. In the insulating state of the 3d transition-metal oxide Pr_2-xSr_xNiO₄, resistivity measurements reveal a real-space ordering of doped holes, similar to La_2-xSr_xNiO₄, but with weaker doping dependence and different charge-ordering temperatures. Additional hole doping results in a break-up of the polaron ordered state and metallic behavior for x≈1.0. In the 4d and 5d transition-metal oxide Sr₂Ir_1-xRu_xO₄, heat capacity (γ₀ ≈ 30 mJ/mol K²) and magnetic susceptibility (x₀ ≈ 1 × 10^-3 emu/mol) reveal electronic correlations. The Wilson ratio (X₀/γ₀) decreases as the MIT (x ≈ 0.7) is approached from the metallic side, suggesting, however, that the MIT is not driven by electron correlations. The importance of the structural distortion and localized to itinerant magnetic transition accompanying the MIT is addressed.

Original language	English (US)
Pages (from-to)	856-858
Number of pages	3
Journal	Physica B: Physics of Condensed Matter
Volume	206-207
Issue number	C
DOIs	https://doi.org/10.1016/0921-4526(94)00607-W
State	Published - Feb 1 1995
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1016/0921-4526(94)00607-W

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@article{0310e9185d1d45c39b56b46b0d0d51dd,

title = "Spin and charge dynamics in 2D metal-insulator transition oxides: (Pr,Sr)2NiO4 and Sr2(Ru,Ir)O4",

abstract = "The insulating and metallic states of metal-insulator transition (MIT) compounds with the K2NiF4-type structure have been studied through resistivity, heat capacity and magnetic susceptibility measurements. In the insulating state of the 3d transition-metal oxide Pr2-xSrxNiO4, resistivity measurements reveal a real-space ordering of doped holes, similar to La2-xSrxNiO4, but with weaker doping dependence and different charge-ordering temperatures. Additional hole doping results in a break-up of the polaron ordered state and metallic behavior for x≈1.0. In the 4d and 5d transition-metal oxide Sr2Ir1-xRuxO4, heat capacity (γ0 ≈ 30 mJ/mol K2) and magnetic susceptibility (x0 ≈ 1 × 10-3 emu/mol) reveal electronic correlations. The Wilson ratio (X0/γ0) decreases as the MIT (x ≈ 0.7) is approached from the metallic side, suggesting, however, that the MIT is not driven by electron correlations. The importance of the structural distortion and localized to itinerant magnetic transition accompanying the MIT is addressed.",

author = "Carter, {S. A.} and Cheong, {S. W.} and B. Batlogg and Cava, {R. J.} and Chen, {C. H.} and Krajewski, {J. J.} and Peck, {W. F.} and Rupp, {L. W.}",

year = "1995",

month = feb,

day = "1",

doi = "10.1016/0921-4526(94)00607-W",

language = "English (US)",

volume = "206-207",

pages = "856--858",

journal = "Physica B: Physics of Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier",

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}

TY - JOUR

T1 - Spin and charge dynamics in 2D metal-insulator transition oxides

T2 - (Pr,Sr)2NiO4 and Sr2(Ru,Ir)O4

AU - Carter, S. A.

AU - Cheong, S. W.

AU - Batlogg, B.

AU - Cava, R. J.

AU - Chen, C. H.

AU - Krajewski, J. J.

AU - Peck, W. F.

AU - Rupp, L. W.

PY - 1995/2/1

Y1 - 1995/2/1

N2 - The insulating and metallic states of metal-insulator transition (MIT) compounds with the K2NiF4-type structure have been studied through resistivity, heat capacity and magnetic susceptibility measurements. In the insulating state of the 3d transition-metal oxide Pr2-xSrxNiO4, resistivity measurements reveal a real-space ordering of doped holes, similar to La2-xSrxNiO4, but with weaker doping dependence and different charge-ordering temperatures. Additional hole doping results in a break-up of the polaron ordered state and metallic behavior for x≈1.0. In the 4d and 5d transition-metal oxide Sr2Ir1-xRuxO4, heat capacity (γ0 ≈ 30 mJ/mol K2) and magnetic susceptibility (x0 ≈ 1 × 10-3 emu/mol) reveal electronic correlations. The Wilson ratio (X0/γ0) decreases as the MIT (x ≈ 0.7) is approached from the metallic side, suggesting, however, that the MIT is not driven by electron correlations. The importance of the structural distortion and localized to itinerant magnetic transition accompanying the MIT is addressed.

AB - The insulating and metallic states of metal-insulator transition (MIT) compounds with the K2NiF4-type structure have been studied through resistivity, heat capacity and magnetic susceptibility measurements. In the insulating state of the 3d transition-metal oxide Pr2-xSrxNiO4, resistivity measurements reveal a real-space ordering of doped holes, similar to La2-xSrxNiO4, but with weaker doping dependence and different charge-ordering temperatures. Additional hole doping results in a break-up of the polaron ordered state and metallic behavior for x≈1.0. In the 4d and 5d transition-metal oxide Sr2Ir1-xRuxO4, heat capacity (γ0 ≈ 30 mJ/mol K2) and magnetic susceptibility (x0 ≈ 1 × 10-3 emu/mol) reveal electronic correlations. The Wilson ratio (X0/γ0) decreases as the MIT (x ≈ 0.7) is approached from the metallic side, suggesting, however, that the MIT is not driven by electron correlations. The importance of the structural distortion and localized to itinerant magnetic transition accompanying the MIT is addressed.

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IS - C

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Spin and charge dynamics in 2D metal-insulator transition oxides: (Pr,Sr)₂NiO₄ and Sr₂(Ru,Ir)O₄

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