Metal-insulator transition in doped Ca 2RuO 4: Potential application in bolometric detection

D. Fobes; E. Vehstedt; J. Peng; G. C. Wang; T. J. Liu; Z. Q. Mao

doi:10.1063/1.4704387

Metal-insulator transition in doped Ca ₂RuO ₄: Potential application in bolometric detection

D. Fobes, E. Vehstedt, J. Peng, G. C. Wang, T. J. Liu, Z. Q. Mao

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

7 Scopus citations

Abstract

We report that the first-order metal-insulator (MI) transition in perovskite ruthenate Ca 2 RuO 4 can be tuned to a nearly second order transition with the transition temperature close to room temperature via Sr, Ti, and Fe chemical doping. The resistivity near this transition ranges from 10 - 2 - 10 - 1 -cm. The maximum temperature coefficient of resistance TCR( -(1/R)dR/dT near the transition exceeds 0.4 K ^-1. This MI transition can also be tuned by a relatively small bias-current. These properties suggest that doped calcium ruthenates can be considered an alternative material for improving upon existing bolometric technologies.

Original language	English (US)
Article number	083709
Journal	Journal of Applied Physics
Volume	111
Issue number	8
DOIs	https://doi.org/10.1063/1.4704387
State	Published - Apr 15 2012

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1063/1.4704387

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title = "Metal-insulator transition in doped Ca 2RuO 4: Potential application in bolometric detection",

abstract = "We report that the first-order metal-insulator (MI) transition in perovskite ruthenate Ca 2 RuO 4 can be tuned to a nearly second order transition with the transition temperature close to room temperature via Sr, Ti, and Fe chemical doping. The resistivity near this transition ranges from 10 - 2 - 10 - 1 -cm. The maximum temperature coefficient of resistance TCR( -(1/R)dR/dT near the transition exceeds 0.4 K -1. This MI transition can also be tuned by a relatively small bias-current. These properties suggest that doped calcium ruthenates can be considered an alternative material for improving upon existing bolometric technologies.",

author = "D. Fobes and E. Vehstedt and J. Peng and Wang, {G. C.} and Liu, {T. J.} and Mao, {Z. Q.}",

note = "Funding Information: This work is supported by the DOD ARO under Grant No. W911NF0910530.",

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doi = "10.1063/1.4704387",

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T1 - Metal-insulator transition in doped Ca 2RuO 4

T2 - Potential application in bolometric detection

AU - Fobes, D.

AU - Vehstedt, E.

AU - Peng, J.

AU - Wang, G. C.

AU - Liu, T. J.

AU - Mao, Z. Q.

N1 - Funding Information: This work is supported by the DOD ARO under Grant No. W911NF0910530.

PY - 2012/4/15

Y1 - 2012/4/15

N2 - We report that the first-order metal-insulator (MI) transition in perovskite ruthenate Ca 2 RuO 4 can be tuned to a nearly second order transition with the transition temperature close to room temperature via Sr, Ti, and Fe chemical doping. The resistivity near this transition ranges from 10 - 2 - 10 - 1 -cm. The maximum temperature coefficient of resistance TCR( -(1/R)dR/dT near the transition exceeds 0.4 K -1. This MI transition can also be tuned by a relatively small bias-current. These properties suggest that doped calcium ruthenates can be considered an alternative material for improving upon existing bolometric technologies.

AB - We report that the first-order metal-insulator (MI) transition in perovskite ruthenate Ca 2 RuO 4 can be tuned to a nearly second order transition with the transition temperature close to room temperature via Sr, Ti, and Fe chemical doping. The resistivity near this transition ranges from 10 - 2 - 10 - 1 -cm. The maximum temperature coefficient of resistance TCR( -(1/R)dR/dT near the transition exceeds 0.4 K -1. This MI transition can also be tuned by a relatively small bias-current. These properties suggest that doped calcium ruthenates can be considered an alternative material for improving upon existing bolometric technologies.

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Metal-insulator transition in doped Ca ₂RuO ₄: Potential application in bolometric detection

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