Insulator-metal transition induced by electric voltage in a ruthenate Mott insulator

T. Zou, J. Peng, M. Gottschalk, P.P. Zhang, Z.Q. Mao, X. Ke

Research output: Contribution to journalArticle

Abstract

We report the observation of electric-voltage induced insulator-metal phase transition in a ruthenate Mott insulator Ca 3 (Ru 0.9 Ti 0.1 ) 2 O 7 . We show that the electric field effect dominates and leads to a sharp phase transition at measurement temperatures far below the Mott transition, whereas the thermal effect becomes more significant and broadens the phase transition as the measurement temperature approaches the insulator-metal transition. The electric field induced insulator-metal transition is presumably attributed to the avalanche breakdown of the correlated insulating state when driven out of equilibrium. This work highlights the strategy of using electric voltage to control the phase transition of this system in addition to other nonthermal parameters such as magnetic field and pressure reported previously. \ 2019 IOP Publishing Ltd.
Original languageEnglish
JournalJournal of Physics Condensed Matter
Volume31
Issue number19
DOIs
StatePublished - 2019

Fingerprint

Metal insulator transition
Phase transitions
transition metals
insulators
Electric potential
electric potential
Temperature measurement
temperature measurement
Electric field effects
Thermal effects
electric fields
Metals
avalanches
Electric fields
temperature effects
Magnetic fields
breakdown
magnetic fields
metals

Cite this

Zou, T. ; Peng, J. ; Gottschalk, M. ; Zhang, P.P. ; Mao, Z.Q. ; Ke, X. / Insulator-metal transition induced by electric voltage in a ruthenate Mott insulator. In: Journal of Physics Condensed Matter. 2019 ; Vol. 31, No. 19.
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Insulator-metal transition induced by electric voltage in a ruthenate Mott insulator. / Zou, T.; Peng, J.; Gottschalk, M.; Zhang, P.P.; Mao, Z.Q.; Ke, X.

In: Journal of Physics Condensed Matter, Vol. 31, No. 19, 2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Insulator-metal transition induced by electric voltage in a ruthenate Mott insulator

AU - Zou, T.

AU - Peng, J.

AU - Gottschalk, M.

AU - Zhang, P.P.

AU - Mao, Z.Q.

AU - Ke, X.

N1 - cited By 0

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AB - We report the observation of electric-voltage induced insulator-metal phase transition in a ruthenate Mott insulator Ca 3 (Ru 0.9 Ti 0.1 ) 2 O 7 . We show that the electric field effect dominates and leads to a sharp phase transition at measurement temperatures far below the Mott transition, whereas the thermal effect becomes more significant and broadens the phase transition as the measurement temperature approaches the insulator-metal transition. The electric field induced insulator-metal transition is presumably attributed to the avalanche breakdown of the correlated insulating state when driven out of equilibrium. This work highlights the strategy of using electric voltage to control the phase transition of this system in addition to other nonthermal parameters such as magnetic field and pressure reported previously. \ 2019 IOP Publishing Ltd.

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JO - Journal of Physics Condensed Matter

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