Article
Chemistry, Multidisciplinary
Yanbin Chen, Chuzhong Zhang, Jiechao Jiang, Efstathios Meletis, Jialu Wu, Jing Ma, Ce-wen Nan, Chonglin Chen
Summary: Double-perovskite PrBaCo2O5.5+delta thin films were grown on (001) LaAlO3 substrates to study the processing dynamic-tuned epitaxial nature and physical properties under different oxygen contents. It was found that the microstructure and properties of the films were sensitive to oxygen content and the nature of the strained layer (SL) at the substrate-film interface. Manipulating the microstructure of perovskite complex oxides through different annealing environments and oxygen kinetics provides new insights into investigating multifunctional complex oxide systems.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Materials Science, Multidisciplinary
Zhongwen Li, Hui Shen, Graham Dawson, Zhengzhong Zhang, Yanzong Wang, Feng Nan, Guang Song, Guannan Li, Yangjiang Wu, Hao Liu
Summary: In this study, the authors used vector piezoresponse force microscopy to observe spontaneous ferroelectric topological domains in ferroelectric materials and discovered their topological arrangements and reversible switching characteristics. They also found that the domain diameter changes with pulse duration in different intrinsic domain structures and confirmed the stability of these topological domain states in the atmosphere.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Physical
F. Mazzola, H. Hassani, D. Amoroso, S. K. Chaluvadi, J. Fujii, V. Polewczyk, P. Rajak, Max Koegler, R. Ciancio, B. Partoens, G. Rossi, I. Vobornik, P. Ghosez, P. Orgiani
Summary: WO3 is a versatile compound that undergoes structural transitions, with various applications such as flexopiezoelectricity, electrochromism, and improving Li-based battery performance. The synthesis of WO3 thin films holds promise for stabilizing electronic phases, but its electronic structure remains unexplored experimentally. This study investigates the electronic structure of strained WO3 thin films and reveals the Fermiology of the system, with significant energy splittings due to atomic distortions. These splittings and the system's thermal stability offer potential for controlling inter- and intraband scattering in electronic applications.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Materials Science, Ceramics
Yulong Bai, Xin Wu, Shifeng Zhao
Summary: This study demonstrates the modulation of inverse and conventional magnetocaloric effects in double perovskite Bi2NiMnO6-delta polycrystalline films by controlling artificial oxygen vacancies. The role of oxygen vacancy concentration in magnetocaloric effect is clarified through the charge transfer mechanism. The findings suggest a potential route for designing magnetocaloric materials by manipulating controlled oxygen vacancy defects.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Hengbo Xiao, Kai Chi, Hongxia Yin, Xiangji Zhou, Pengxiang Lei, Peizhi Liu, Jiakun Fang, Xiuhong Li, Songliu Yuan, Zhen Zhang, Yaqiong Su, Junjie Guo, Lihua Qian
Summary: Oxygen vacancies in transition metal oxides can be used to modulate surface reconstruction for enhancing the oxygen evolution reaction (OER). In this study, oxygen vacancies were specifically localized within MoO4 tetrahedrons rather than CoO6 octahedrons in the CoMoO4 catalyst, resulting in the coherent reconstruction of CoO6 octahedrons into pure CoOOH with tunable OER activities. The manipulated distorted polyhedrons facilitated the complete transformation of CoO6 octahedrons into pure CoOOH at lower potentials, leading to a significantly improved intrinsic activity for OER.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Materials Science, Ceramics
Xu Jiang, Jie Sun, Xiaojie Chai, Yifan Chen, Wei Zhang, Jun Jiang, Anquan Jiang
Summary: The study found that the wall current varies with the angle between the applied electric field and the initial polarization, and that the oxygen vacancy concentration can be controlled through thermal annealing, affecting the magnitude of the domain wall current.
CERAMICS INTERNATIONAL
(2021)
Review
Chemistry, Multidisciplinary
Yunlong Sun, Jack Yang, Sean Li, Danyang Wang
Summary: Perovskite oxide thin films exhibit intriguing electrical, magnetic, and photovoltaic properties, which can be combinatorially harnessed in future microelectronic devices. Defect engineering plays a crucial role in understanding and manipulating the physical properties of materials. Different types of defects, such as point defects, dopants, domains, and domain walls, impact the functional properties of perovskite thin films by affecting the oxidation states of relevant ions and inducing anomalous behaviors.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Guanglu Lei, Zishuo Li, Guocai Lu, Jinyuan Hu, Haochuan Shang, Xiaolei Zhang, Xianghong Liu, Jun Zhang, Xiangxin Guo
Summary: Metal oxide semiconductor (MOS) thin films, especially tungsten oxide (WO3) thin films, have shown great potential as sensing layers for gas sensor devices. This study focuses on the deposition and annealing process of WO3 thin films on interdigital electrodes, and explores the impact of oxygen vacancies on sensor properties. The results indicate that the WO3 sensor annealed at 500 degrees C exhibits the best performance in detecting triethylamine (TEA), which is attributed to the enhanced adsorption of oxidative oxygen species due to the presence of abundant oxygen vacancies.
JOURNAL OF MATERIOMICS
(2022)
Article
Materials Science, Coatings & Films
Mohsin Raza, Pascal Boulet, Jean-Francois Pierson, Rony Snyders, Stephanos Konstantinidis
Summary: The thermal stability of reactive magnetron sputter deposited oxygen vacancy stabilized cubic zirconia thin films has been studied, showing stability up to 750 degrees Celsius but structural transformation to monoclinic phase at higher temperatures due to compressive stresses caused by differences in thermal expansion coefficients between the film and substrate. Thermal cycling experiments at 700 degrees Celsius demonstrated that the films retained their initial cubic structure.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Sangita Bhowmick, Rajib Saha, Madhuri Mishra, Ankita Sengupta, Sanatan Chattopadhyay, Subhananda Chakrabarti
Summary: The impact of oxygen concentration on the structural, optical properties, and device performance of Ga2O3 thin film was investigated by controlling the oxygen flow rate during deposition. Higher oxygen flow rate led to poorer crystalline quality, increased film roughness, and introduction of defects. Decreasing oxygen concentration resulted in an increase in optical bandgap, a decrease in blue band contribution, and reduced defect concentration, surface roughness, and interface states. These findings are significant for improving the quality of Ga2O3 films and their applications in device fabrication.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Nan Li, Jingjia Guo, Yiwen Ding, Yaqi Hu, Chunhua Zhao, Chongjun Zhao
Summary: Perovskites are efficient catalysts for the oxygen evolution reaction (OER), with complex perovskites like La0.6Sr0.4Co0.8Fe0.2O3-delta (LSCF) and Ba0.5Sr0.5C0.05Fe0.2O3-delta (BSCF) showing outstanding OER catalytic activity after optimization through the introduction of double cation defects A1 and A2, leading to enhanced activity and stability.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Jiayi Wang, Yongjin Shin, Jay R. Paudel, Joseph D. Grassi, Raj K. Sah, Weibing Yang, Evguenia Karapetrova, Abdulhadi Zaidan, Vladimir N. Strocov, Christoph Klewe, Padraic Shafer, Alexander X. Gray, James M. Rondinelli, Steven J. May
Summary: This study demonstrates how epitaxial strain can induce preferential occupancy of anions in perovskite oxyfluoride films, leading to changes in the chemical and electronic structures. The findings pave the way for future materials design and synthesis efforts that leverage this greater degree of atomic control.
CHEMISTRY OF MATERIALS
(2021)
Review
Nanoscience & Nanotechnology
Hui-Chuan Liu, Si-Ming Zeng, Rui Li, Yan-Ping Jiang, Qiu-Xiang Liu, Xin-Gui Tang
Summary: The study demonstrated bipolar resistive switching and ferroelectricities of Ni0.5Zn0.5Fe2O4 (NZFO) thin films using Au/NZFO/LNO/Si structure. It was found that annealing atmosphere influences the structure and properties of NZFO, with oxygen vacancy and strain stress playing a significant role. The saturation magnetization and remnant polarization values of the samples were affected by the annealing atmosphere, with improved resistive switching property observed in NZFO annealed in nitrogen atmosphere.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Huijun Chen, Chaesung Lim, Mengzhen Zhou, Zuyun He, Xiang Sun, Xiaobao Li, Yongjian Ye, Ting Tan, Hui Zhang, Chenghao Yang, Jeong Woo Han, Yan Chen
Summary: This study investigates the impact of B-site cation doping on PSCxFN thin films, revealing that Co doping promotes the formation of oxygen vacancies and enhances surface activity, but excessive Co doping can lead to decreased stability. Moderate levels of Co doping can achieve both good HOR activity and stability.
Article
Materials Science, Ceramics
Jiangtao Wu, Huaicheng Xiang, Yun Sun, Alin Cao, Liang Fang
Summary: Fluorite-structured Ce1-xYxO1-x/2 ceramics were prepared by solid-phase reaction method. XRD analysis shows that the maximum solid solubility of Y3+ in CeO2 is less than 60%. With the increase of x, the dielectric constant and temperature coefficient decrease, while the Q x f value reaches its maximum at x=0.3. The presence of Ce3+ and the rattling effect of Ce4+ are the reasons for the higher dielectric constant compared to single material CeO2.
CERAMICS INTERNATIONAL
(2023)
Article
Nanoscience & Nanotechnology
Erik Enriquez, Ping Lu, Leigang Li, Bruce Zhang, Haiyan Wang, Quanxi Jia, Aiping Chen
Summary: Multiferroic materials have attracted great interest as functional device materials. This study develops a new 3D super-nanocomposite material by microstructure engineering, which enhances functional properties by embedding CFO nanopillar arrays in a BTO film matrix.
Article
Physics, Multidisciplinary
J. Choi, Q. Wang, S. Joehr, N. B. Christensen, J. Kuespert, D. Bucher, D. Biscette, M. H. Fischer, M. Huecker, T. Kurosawa, N. Momono, M. Oda, O. Ivashko, M. Zimmermann, M. Janoschek, J. Chang
Summary: In the cuprates, the unidirectional nature of the CDW in La1.88Sr0.12CuO4 was established using x-ray diffraction with uniaxial pressure. A significant enhancement of the CDW amplitude was found when homogeneous superconductivity was partially suppressed by a magnetic field.
PHYSICAL REVIEW LETTERS
(2022)
Article
Multidisciplinary Sciences
T. Weber, D. M. Fobes, J. Waizner, P. Steffens, G. S. Tucker, M. Bohm, L. Beddrich, C. Franz, H. Gabold, R. Bewley, D. Voneshen, M. Skoulatos, R. Georgii, G. Ehlers, A. Bauer, C. Pfleiderer, P. Boeni, M. Janoschek, M. Garst
Summary: The study found that the motion of a spin excitation in materials with nontrivial magnetic order is deflected, similar to the effect of the Lorentz force on a charged particle in an orbital magnetic field. By using neutron scattering, researchers investigated the propagation of magnons in a lattice of skyrmion tubes in manganese silicide and discovered a topological magnon band structure in reciprocal space.
Article
Multidisciplinary Sciences
Qisi Wang, K. von Arx, D. G. Mazzone, S. Mustafi, M. Horio, J. Kuspert, J. Choi, D. Bucher, H. Wo, J. Zhao, W. Zhang, T. C. Asmara, Y. Sassa, M. Mansson, N. B. Christensen, M. Janoschek, T. Kurosawa, N. Momono, M. Oda, M. H. Fischer, T. Schmitt, J. Chang
Summary: A study finds that mild uniaxial pressure can change the ordering pattern of stripes and pin them to the crystal axis. This change may have an impact on superconductivity and could be a key prerequisite for the coexistence of stripes and superconductivity.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Samyak Dhole, Aiping Chen, Wanyi Nie, Baeho Park, Quanxi Jia
Summary: Perovskite offers a range of functionalities and physical properties that can be further tuned through strain engineering. This review focuses on the structure-property relationships of perovskite metal oxide films and elucidates the principles behind manipulating functionalities through different modalities of strain engineering approaches.
Article
Physics, Condensed Matter
Nicholas Cucciniello, Derek Lee, Henry Y. Feng, Zihao Yang, Hao Zeng, Nag Patibandla, Mingwei Zhu, Quanxi Jia
Summary: In this article, we discuss the superconducting properties of niobium nitride (NbN) films and their relationships with material properties, processing parameters, device architectures, and performance. We also highlight the latest progress in optimizing the performance parameters of NbN-based superconducting nanowire single-photon detectors (SNSPDs).
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Multidisciplinary Sciences
M. C. Rahn, K. Kummer, A. Hariki, K-H Ahn, J. Kunes, A. Amorese, J. D. Denlinger, D-H Lu, M. Hashimoto, E. Rienks, M. Valvidares, F. Haslbeck, D. D. Byler, K. J. McClellan, E. D. Bauer, J. X. Zhu, C. H. Booth, A. D. Christianson, J. M. Lawrence, F. Ronning, M. Janoschek
Summary: Resonant inelastic X-ray scattering (RIXS) was used in this study to investigate CePd3 and clarify the hybridization process between local high-energy degrees of freedom and the underlying metallic state at low temperature, highlighting its impact on the properties of correlated metals.
NATURE COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Hongyi Dou, Markus Hellenbrand, Ming Xiao, Zedong Hu, Sundar Kunwar, Aiping Chen, Judith L. MacManus-Driscoll, Quanxi Jia, Haiyan Wang
Summary: Defect engineering in valence change memories has been extensively studied to tune the concentration and transport of oxygen vacancies. However, most of the focus has been on individual extended defects. This work investigates the impact of engineering large numbers of grain boundaries on resistive switching mechanisms and performances. Three different grain morphologies are realized in CeO2 thin films, and the devices exhibit vastly different resistive switching behaviors. The research provides design guidelines for grain boundary engineering of oxide-based resistive switching materials.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Multidisciplinary Sciences
Markus Hellenbrand, Babak Bakhit, Hongyi Dou, Ming Xiao, Megan O. Hill, Zhuotong Sun, Adnan Mehonic, Aiping Chen, Quanxi Jia, Haiyan Wang, Judith L. MacManus-Driscoll
Summary: A design concept of phase-separated amorphous nanocomposite thin films is presented that enables interfacial resistive switching in hafnium oxide-based devices. By incorporating an average of 7% Ba into hafnium oxide, films consisting of amorphous HfOx host matrix interspersed with Ba-rich nanocolumns are formed. The resistive switching is restricted to an interfacial Schottky-like energy barrier, which can be tuned by ionic migration under an applied electric field. The resulting devices exhibit stable reproducibility and switching endurance, allowing for multiple intermediate resistance states and synaptic spike-timing-dependent plasticity.
Article
Optics
Samyak Dhole, Xiucheng Wei, Haolei Hui, Pinku Roy, Zachary Corey, Yongqiang Wang, Wanyi Nie, Aiping Chen, Hao Zeng, Quanxi Jia
Summary: BaZrS3 thin films were successfully fabricated via a facile aqueous solution route. The films exhibited a single-phase structure, desirable optoelectronic properties, and applicable conductivity, which are of significant importance for its applications.
Article
Chemistry, Physical
Nicholas Cucciniello, Alessandro R. Mazza, Pinku Roy, Sundar Kunwar, Di Zhang, Henry Y. Feng, Katrina Arsky, Aiping Chen, Quanxi Jia
Summary: With the anticipated doubling of energy demand in the next three decades, there is a pressing need to advance the technology of energy harvesting and storage for renewable energy. This study focuses on a specific subset of dielectric materials, ferroelectrics, for energy storage. By exploring the influence of crystallographic orientation on the microstructure and properties, the research offers insights into enhancing energy storage performance.
Article
Chemistry, Multidisciplinary
Pinku Roy, Di Zhang, Alessandro R. Mazza, Nicholas Cucciniello, Sundar Kunwar, Hao Zeng, Aiping Chen, Quanxi Jia
Summary: Topologically protected non-trivial spin textures give rise to novel phenomena, such as the topological Hall effect. This study investigates the Hall effect in SrRuO3/La0.42Ca0.58MnO3 bilayers and finds that the proximity effect of LCMO plays a critical role. The reduction in SRO thickness enhances THE-like features.
Article
Materials Science, Multidisciplinary
R. Frison, J. Kuespert, Qisi Wang, O. Ivashko, M. V. Zimmermann, M. Meven, D. Bucher, J. Larsen, Ch. Niedermayer, M. Janoschek, T. Kurosawa, N. Momono, M. Oda, N. B. Christensen, J. Chang
Summary: A combined x-ray and neutron diffraction study was conducted on the stripe-ordered superconductor La₀Sr₀.₁₂CuO₄. The crystal structure was found to be consistent with the orthorhombic Bmab space group commonly reported in the literature. However, this structure is not symmetry compatible with the second-order phase transition into the stripe order phase. Many forbidden Bragg peaks in the Bmab space group were observed in this study, and the analysis revealed monoclinic lattice distortions consistent with charge stripe order.
Article
Physics, Multidisciplinary
Ioannis Giannakis, Divyanshi Sar, Joel Friedman, Chang-Jong Kang, Marc Janoschek, Pinaki Das, Eric D. Bauer, Gabriel Kotliar, Pegor Aynajian
Summary: The Kondo hybridization in UGe2, a heavy fermion system, leads to the formation of two ferromagnetic phases accompanied by spin-triplet superconductivity. Scanning tunneling microscopy and spectroscopy reveal the presence of Kondo resonance and sharp 5f-electron states at high temperatures. The resonance narrows and splits, causing the itinerant f-electron spectral weight to disappear at the Fermi energy as the temperature decreases.
PHYSICAL REVIEW RESEARCH
(2022)
