We report the nonvolatile modulation of microwave conductivity in ferroelectric PbZr0.2Ti0.8O3-gated ultrathin LaNiO3/La0.67Sr0.33MnO3 correlated oxide channel visualized by microwave impedance microscopy. Polarization switching is obtained by applying a tip bias above the coercive voltage of the ferroelectric layer. The microwave conductivity of the correlated channel underneath the up- and down-polarized domains has been quantified by finite-element analysis of the tip-sample admittance. At room temperature, a resistance on/off ratio above 100 between the two polarization states is sustained at frequencies up to 1 GHz, which starts to drop at higher frequencies. The frequence-dependence suggests that the conductance modulation originates from ferroelectric field-effect control of carrier density. The modulation is nonvolatile, remaining stable after 6 months of domain writing. Our work is significant for potential applications of oxide-based ferroelectric field-effect transistors in high-frequency nanoelectronics and spintronics.
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28 October 2024
Research Article|
October 29 2024
Room-temperature modulation of microwave conductivity in ferroelectric-gated correlated oxides
Shizai Chu
;
Shizai Chu
(Data curation, Formal analysis, Software, Writing – original draft, Writing – review & editing)
1
Department of Physics, University of Texas at Austin
, Austin, Texas 78712, USA
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Yifei Hao
;
Yifei Hao
(Investigation, Methodology)
2
Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln
, Lincoln, Nebraska 68588-0299, USA
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Shaopeng Feng
;
Shaopeng Feng
(Data curation)
1
Department of Physics, University of Texas at Austin
, Austin, Texas 78712, USA
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Xia Hong
;
Xia Hong
(Conceptualization, Supervision, Validation)
2
Department of Physics and Astronomy & Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln
, Lincoln, Nebraska 68588-0299, USA
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Keji Lai
Keji Lai
a)
(Funding acquisition, Project administration, Supervision, Validation, Writing – original draft, Writing – review & editing)
1
Department of Physics, University of Texas at Austin
, Austin, Texas 78712, USA
a)Author to whom correspondence should be addressed: [email protected]
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a)Author to whom correspondence should be addressed: [email protected]
Appl. Phys. Lett. 125, 182902 (2024)
Article history
Received:
July 30 2024
Accepted:
October 21 2024
Citation
Shizai Chu, Yifei Hao, Shaopeng Feng, Xia Hong, Keji Lai; Room-temperature modulation of microwave conductivity in ferroelectric-gated correlated oxides. Appl. Phys. Lett. 28 October 2024; 125 (18): 182902. https://doi.org/10.1063/5.0231424
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