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Manipulation of the Ferromagnetism in LaCoO3 Thin Films Through Cation‐Stoichiometric Engineering (2023)
Journal Article
Huang, T., Lyu, Y., Huyan, H., Ni, J., Saremi, S., Wang, Y., …Yu, P. (2023). Manipulation of the Ferromagnetism in LaCoO3 Thin Films Through Cation‐Stoichiometric Engineering. Advanced Electronic Materials, 9(5), https://doi.org/10.1002/aelm.202201245

Spin-state transitions are an important research topic in complex oxides with the diverse magnetic states involved. In particular, the low-spin to high-spin transition in LaCoO3 thin films has drawn a wide range of attention due to the emergent ferro... Read More about Manipulation of the Ferromagnetism in LaCoO3 Thin Films Through Cation‐Stoichiometric Engineering.

Atomic‐Scale Control of Electronic Structure and Ferromagnetic Insulating State in Perovskite Oxide Superlattices by Long‐Range Tuning of BO6 Octahedra (2020)
Journal Article
Li, W., Zhu, B., Zhu, R., Wang, Q., Lu, P., Sun, Y., …MacManus‐Driscoll, J. L. (2020). Atomic‐Scale Control of Electronic Structure and Ferromagnetic Insulating State in Perovskite Oxide Superlattices by Long‐Range Tuning of BO6 Octahedra. Advanced Functional Materials, 30(40), Article 2001984. https://doi.org/10.1002/adfm.202001984

Control of BO6 octahedral rotations at the heterointerfaces of dissimilar ABO3 perovskites has emerged as a powerful route for engineering novel physical properties. However, its impact length scale is constrained at 2–6 unit cells close to the inter... Read More about Atomic‐Scale Control of Electronic Structure and Ferromagnetic Insulating State in Perovskite Oxide Superlattices by Long‐Range Tuning of BO6 Octahedra.

Reversible manipulation of the magnetic state in SrRuO3 through electric-field controlled proton evolution (2020)
Journal Article
Li, Z., Shen, S., Tian, Z., Hwangbo, K., Wang, M., Wang, Y., …Yu, P. (2020). Reversible manipulation of the magnetic state in SrRuO3 through electric-field controlled proton evolution. Nature Communications, 11(1), Article 184. https://doi.org/10.1038/s41467-019-13999-1

Ionic substitution forms an essential pathway to manipulate the structural phase, carrier density and crystalline symmetry of materials via ion-electron-lattice coupling, leading to a rich spectrum of electronic states in strongly correlated systems.... Read More about Reversible manipulation of the magnetic state in SrRuO3 through electric-field controlled proton evolution.

Electric Field–Controlled Multistep Proton Evolution in HxSrCoO2.5 with Formation of H–H Dimer (2019)
Journal Article
Li, H., Lou, F., Wang, Y., Zhang, Y., Zhang, Q., Wu, D., …Yu, P. (2019). Electric Field–Controlled Multistep Proton Evolution in HxSrCoO2.5 with Formation of H–H Dimer. Advanced Science, 6(20), Article 1901432. https://doi.org/10.1002/advs.201901432

Ionic evolution–induced phase transformation can lead to wide ranges of novel material functionalities with promising applications. Here, using the gating voltage during ionic liquid gating as a tuning knob, the brownmillerite SrCoO2.5 is transformed... Read More about Electric Field–Controlled Multistep Proton Evolution in HxSrCoO2.5 with Formation of H–H Dimer.

Tuning the electronic properties of epitaxial strained CaFeO3−δ thin films (2019)
Journal Article
Huang, T., Wang, Y., Li, H., Wang, M., Lyu, Y., Shen, S., …Yu, P. (2019). Tuning the electronic properties of epitaxial strained CaFeO3−δ thin films. Applied Physics Letters, 114(22), Article 221907. https://doi.org/10.1063/1.5098025

Strain engineering of transition metal oxides due to their desirable properties has long been a focal point in both physics and material sciences. Here, we investigate the strain dependence of electronic and optical properties of the high valence iro... Read More about Tuning the electronic properties of epitaxial strained CaFeO3−δ thin films.

Strain-induced ferroelectricity and spin-lattice coupling in SrMnO3 thin films (2018)
Journal Article
Guo, J., Wang, P., Yuan, Y., He, Q., Lu, J., Chen, T., …Yu, P. (2018). Strain-induced ferroelectricity and spin-lattice coupling in SrMnO3 thin films. Physical review B, 97(23), Article 235135. https://doi.org/10.1103/physrevb.97.235135

Designing novel multiferroic materials with simultaneous ferroelectric and magnetic orders has been one of the focal points over the last decade due to the promising applications and rich physics involved. In this study, using epitaxial strain (up to... Read More about Strain-induced ferroelectricity and spin-lattice coupling in SrMnO3 thin films.

Out-of-Plane Piezoelectricity and Ferroelectricity in Layered α-In2Se3 Nanoflakes (2017)
Journal Article
Zhou, Y., Wu, D., Zhu, Y., Cho, Y., He, Q., Yang, X., …Lai, K. (2017). Out-of-Plane Piezoelectricity and Ferroelectricity in Layered α-In2Se3 Nanoflakes. Nano Letters, 17(9), 5508-5513. https://doi.org/10.1021/acs.nanolett.7b02198

Piezoelectric and ferroelectric properties in the two-dimensional (2D) limit are highly desired for nanoelectronic, electromechanical, and optoelectronic applications. Here we report the first experimental evidence of out-of-plane piezoelectricity an... Read More about Out-of-Plane Piezoelectricity and Ferroelectricity in Layered α-In2Se3 Nanoflakes.

Electric-field control of tri-state phase transformation with a selective dual-ion switch (2017)
Journal Article
Lu, N., Zhang, P., Zhang, Q., Qiao, R., He, Q., Li, H., …Yu, P. (2017). Electric-field control of tri-state phase transformation with a selective dual-ion switch. Nature, 546(7656), 124-128. https://doi.org/10.1038/nature22389

Materials can be transformed from one crystalline phase to another by using an electric field to control ion transfer, in a process that can be harnessed in applications such as batteries1, smart windows2 and fuel cells3. Increasing the number of tra... Read More about Electric-field control of tri-state phase transformation with a selective dual-ion switch.

The unconventional doping in YBa2Cu3O7−x/La0.7Ca0.3MnO3 heterostructures by termination control (2017)
Journal Article
Tra, V., Huang, R., Gao, X., Chen, Y., Liu, Y., Kuo, W., …Chu, Y. (2017). The unconventional doping in YBa2Cu3O7−x/La0.7Ca0.3MnO3 heterostructures by termination control. Applied Physics Letters, 110(3), Article 032402. https://doi.org/10.1063/1.4973996

In strongly correlated oxides, heterostructures provide a powerful route to manipulate the charge, spin, orbital, and lattice degrees of freedom to create distinctive functionalities. In this work, we have achieved atomically precise interface contro... Read More about The unconventional doping in YBa2Cu3O7−x/La0.7Ca0.3MnO3 heterostructures by termination control.

Permanent ferroelectric retention of BiFeO3 mesocrystal (2016)
Journal Article
Hsieh, Y., Xue, F., Yang, T., Liu, H., Zhu, Y., Chen, Y., …Chu, Y. (2016). Permanent ferroelectric retention of BiFeO3 mesocrystal. Nature Communications, 7, Article 13199. https://doi.org/10.1038/ncomms13199

Non-volatile electronic devices based on magnetoelectric multiferroics have triggered new possibilities of outperforming conventional devices for applications. However, ferroelectric reliability issues, such as imprint, retention and fatigue, must be... Read More about Permanent ferroelectric retention of BiFeO3 mesocrystal.

A Metal-Insulator Transition of the Buried MnO2 Monolayer in Complex Oxide Heterostructure (2016)
Journal Article
Liu, H., Lin, J., Fang, Y., Wang, J., Huang, B., Gao, X., …Chu, Y. (2016). A Metal-Insulator Transition of the Buried MnO2 Monolayer in Complex Oxide Heterostructure. Advanced Materials, 28(41), 9142-9151. https://doi.org/10.1002/adma.201602281

A novel artificially created MnO2 monolayer system is demonstrated in atomically controlled epitaxial perovskite heterostructures. With careful design of different electrostatic boundary conditions, a magnetic transition as well as a metal–insulator... Read More about A Metal-Insulator Transition of the Buried MnO2 Monolayer in Complex Oxide Heterostructure.

Van der Waals epitaxy of functional MoO2 film on mica for flexible electronics (2016)
Journal Article
Ma, C., Lin, J., Liu, H., Do, T. H., Zhu, Y., Ha, T. D., …Chu, Y. (2016). Van der Waals epitaxy of functional MoO2 film on mica for flexible electronics. Applied Physics Letters, 108(25), Article 253104. https://doi.org/10.1063/1.4954172

Flexible electronics have a great potential to impact consumer electronics and with that our daily life. Currently, no direct growth of epitaxial functional oxides on commercially available flexible substrates is possible. In this study, in order to... Read More about Van der Waals epitaxy of functional MoO2 film on mica for flexible electronics.

Electrically enhanced magnetization in highly strained BiFeO3 films (2016)
Journal Article
Yang, J., Kuo, C., Liu, H., Ding, H., Duan, C., Lin, H., …Chu, Y. (2016). Electrically enhanced magnetization in highly strained BiFeO3 films. NPG Asia Materials, 8(5), Article e269. https://doi.org/10.1038/am.2016.55

The control of magnetism via an electric field has attracted substantial attention because of potential applications in magnetoelectronics, spintronics and high-frequency devices. In this study, we demonstrate a new approach to enhance and control th... Read More about Electrically enhanced magnetization in highly strained BiFeO3 films.

Observation of a three-dimensional quasi-long-range electronic supermodulation in YBa2Cu3O7-x/La0. 7Ca0. 3MnO3 heterostructures (2016)
Journal Article
He, J., Shafer, P., Mion, T. R., Tra, V. T., He, Q., Kong, J., …He, R. (2016). Observation of a three-dimensional quasi-long-range electronic supermodulation in YBa2Cu3O7-x/La0. 7Ca0. 3MnO3 heterostructures. Nature Communications, 7, Article 10852. https://doi.org/10.1038/ncomms10852

Recent developments in high-temperature superconductivity highlight a generic tendency of the cuprates to develop competing electronic (charge) supermodulations. While coupled with the lattice and showing different characteristics in different materi... Read More about Observation of a three-dimensional quasi-long-range electronic supermodulation in YBa2Cu3O7-x/La0. 7Ca0. 3MnO3 heterostructures.

Enhanced Magnetocaloric Effect Driven by Interfacial Magnetic Coupling in Self-Assembled Mn3O4–La0.7Sr0.3MnO3 Nanocomposites. (2015)
Journal Article
Vandrangi, S. K., Yang, J., Zhu, Y., Chin, Y., Lin, H., Chen, C., …Chu, Y. (2015). Enhanced Magnetocaloric Effect Driven by Interfacial Magnetic Coupling in Self-Assembled Mn3O4–La0.7Sr0.3MnO3 Nanocomposites. ACS Applied Materials and Interfaces, 7(48), 26504-26511. https://doi.org/10.1021/acsami.5b07585

Magnetic refrigeration, resulting from the magnetocaloric effect of a material around the magnetic phase-transition temperature, is a topic of great interest as it is considered to be an alternate energy solution to conventional vapor-compression ref... Read More about Enhanced Magnetocaloric Effect Driven by Interfacial Magnetic Coupling in Self-Assembled Mn3O4–La0.7Sr0.3MnO3 Nanocomposites..