Article
Materials Science, Multidisciplinary
Feng An, Mengfei Zi, Qianxin Chen, Cong Liu, Ke Qu, Tingting Jia, Mingqiang Huang, Gaokuo Zhong
Summary: In this study, high-quality BTFM-CTO thin films were prepared on mica substrates using the sol-gel method. The films exhibited controllable ferroelectric and magnetic effects at room temperature. The in-plane ferroelectric domains of the films could be switched by applying bending strain or an external magnetic field, demonstrating the multifield control ferroelectric polarization properties of the flexible thin films.
MATERIALS TODAY PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Lun Jin, Danrui Ni, Xin Gui, Daniel B. Straus, Qiang Zhang, Robert J. Cava
Summary: The authors successfully doped Sr2GaSbO6, a magnetically silent double perovskite semiconductor, with magnetic trivalent cation Mn3+ to induce ferromagnetism and tune its bandgap. The new material, Sr2Ga1-xMnxSbO6 double perovskite, exhibits tunable ferromagnetic ordering temperature and bandgap, suggesting its potential application in next-generation oxide-based spintronic devices.
Article
Nanoscience & Nanotechnology
Zhiyan Jia, Wenjie Wang, Zichao Li, Rong Sun, Shengqiang Zhou, Francis Leonard Deepak, Chenliang Su, Ying Li, Zhongchang Wang
Summary: This study successfully demonstrates the controlled growth of ultrathin gamma-Fe2O3 nanoflakes with varying morphologies at different growth temperatures, showing room-temperature ferromagnetism and semiconducting properties. The morphology changes from triangular to polygonal shapes due to thermodynamic control, exhibiting different electrical conductivities.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Optics
Yeonjeong Koo, Hyeongwoo Lee, Tatiana Ivanova, Ali Kefayati, Vasili Perebeinos, Ekaterina Khestanova, Vasily Kravtsov, Kyoung-Duck Park
Summary: We demonstrate all-round dynamic control of interlayer-excitons and -trions in a WSe2/Mo-0.5 W-0.5 Se-2 heterobilayer using multifunctional tip-enhanced photoluminescence (TEPL) spectroscopy with <20 nm spatial resolution. We show the bandgap tunable interlayer excitons and the dynamic interconversion between interlayer-trions and -excitons through the combinational tip-induced engineering of GPa-scale pressure and plasmonic hot electron injection, with simultaneous spectroscopic TEPL measurements. This unique nano-opto-electro-mechanical control approach provides new strategies for developing versatile nano-excitonic/trionic devices using TMD heterobilayers.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Liqiong He, Huiyu Nong, Junyang Tan, Qinke Wu, Rongxu Zheng, Shilong Zhao, Qiangmin Yu, Jingwei Wang, Bilu Liu
Summary: A one-pot chemical vapor deposition method is reported for the growth of stable 2D Cr2O3-CrN mosaic heterostructures with controlled ratio of components and ferromagnetic properties. The ferromagnetism of the heterostructures can be controlled by changing the CrN:Cr2O3 ratio. The obtained Cr2O3-CrN heterostructures are stable at elevated temperatures and exhibit high Curie temperature. This work presents a facile method for fabricating 2D heterostructures with tunable magnetism.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Ceramics
Wenyue Zhao, Zhao Wang, Ze Li, Yazhou Peng, Lei Shi, Wenjing Hua, Lidong Wang, Wei-Dong Fei, Yu Zhao
Summary: In this paper, the effect of defect dipoles on the ferromagnetic and ferroelectric properties of Ca3Mn2O7 improper ferroelectric thin films is reported. Both Mn3+-V···O and Li+-Al3+ defect dipoles can introduce ferromagnetism in the films, and Li+-Al3+ defect dipole can also improve ferroelectricity. The local lattice distortion plays a crucial role in the multiferroic properties of the film.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Yao Wen, Shiheng Liang, Zhuo Dong, Ruiqing Cheng, Lei Yin, Peng He, Hao Wang, Baoxing Zhai, Yang Zhao, Wendi Li, Jian Jiang, Zhongwei Li, Chuansheng Liu, Kaifeng Dong, Jun He, Kai Zhang
Summary: Research has found that 2D chromium telluride compounds exhibit diverse spin configurations and high-temperature ferromagnetism, offering unique opportunities for studying spin physics and developing spintronic devices. A van der Waals epitaxial approach has been developed to synthesize 2D ternary chromium tellurium compounds with varying thicknesses. The study has also explored the tunable labyrinthine-domain ferromagnetic behaviors resulting from dipolar interactions and demonstrated multibit data storage using domain walls.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
S. Satapathy, Golla Prudhvi, Azam Ali Khan, Pratik Deshmukh, Anju Ahlawat, K. R. S. Preethi Meher, A. K. Karnal
Summary: MFO/BCZT ceramic composite exhibits multiferroic and magnetoelectric coupling properties with proper surface interaction, showing potential for device applications at room temperature.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Yilei Wu, Shuaihua Lu, Qionghua Zhou, Ming-Gang Ju, Xiao Cheng Zeng, Jinlan Wang
Summary: This article presents an effective screening approach to search for efficient two-dimensional hybrid organic-inorganic perovskites (2D HOIPs) as room-temperature phosphorescence (RTP) materials. The screening guidelines include the Dexter-type energy transfer mechanism, computed excited-state properties, and molecular morphing operators. A newly proposed tolerance factor is used to assess the structural stability of the 2D HOIPs. Overall, 539 candidates are identified as promising RTP materials, with four 2D HOIPs predicted to have robust room-temperature stability and suitable energy level for optoelectronic applications.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Physics, Applied
Tianxia Guo, YuJie Liu, Yi Sun, Shuhan Zhang, Xiaokang Xu, Licheng Wang, Wenqi Zhou, Yongjun Liu, Xiaojing Yao, Xiuyun Zhang
Summary: This study proposes a field-effect spin filter based on a two-dimensional antiferromagnetic/ferromagnetic vdW heterostructure MnPS3/MnCl3. The heterostructure exhibits antiferromagnetic-ferromagnetic transition and semiconductor-metal-half-metal transitions when the interlayer distance is reduced to d<2.0 angstrom. A semiconductor-half-metal transition can also be achieved by applying an external electric field. This study offers a potential approach for designing spintronic devices using two-dimensional magnetic vdW heterostructures.
APPLIED PHYSICS LETTERS
(2023)
Article
Polymer Science
Jun Wang, Xin-Yue Lou, Jun Tang, Ying-Wei Yang
Summary: A facile doping method for polymer systems with prolonged room temperature phosphorescence (RTP) emission and high phosphorescence quantum yield is reported in this study. The efficient and long-lived color-tunable RTP system is analyzed based on experimental data and theoretical calculations. This research demonstrates the potential for further development in dynamic information encryption applications.
MACROMOLECULAR RAPID COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Fang Peng, Yian Chen, Hongchen Liu, Pan Chen, Feng Peng, Haisong Qi
Summary: This study presents the synthesis of cellulose derivatives with 1,4-dihydropyridine rings, resulting in materials with ultralong room-temperature phosphorescence. The cellulose films also exhibit excitation-dependent and water stimulus-response afterglows, making them suitable for applications in information encryption and anti-counterfeiting.
ADVANCED MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Mei Ying Liu, Jun Xi Yu, Xiao Li Zhu, Zhi Ping Bian, Xiang Zhou, Yu Hang Liang, Zhen Lin Luo, Yue Wei Yin, Jiang Yu Li, Xiang Ming Chen
Summary: In this study, h-Lu1-xInxFeO3 thin films were successfully prepared with a stable hexagonal structure achieved at room temperature. The films exhibited high remanent polarization and excellent polarization switching performance, along with a strong magnetoelectric coupling effect. These results demonstrate the potential application of h-Lu1-xInxFeO3 thin films in magnetoelectric memory and detection devices.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Engineering, Electrical & Electronic
K. Yadagiri, Y. Wang, P. Wu, T. Wu
Summary: The static and dynamic properties of magnetic thin film stacks were studied, revealing the influence of bottom FeGaB layer thickness on magnetic coercive field. The dynamic properties of multilayer thin film stacks showed larger values at lower temperatures.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Engineering, Environmental
Jiaju Shi, Wenjie Tao, Yusheng Zhou, Guodong Liang
Summary: This study reports a new type of photo-responsive materials (PRMs) with tunable luminescence lifetimes manipulated by light stimulus. Transparent and flexible polymer films with room temperature phosphorescence (RTP) property are prepared by solution blending polymers and chromophores. The tunable RTP lifetime and intensity of the doped polymer films offer various applications including sensing, anti-counterfeiting, and data storage.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Nanoscience & Nanotechnology
Hong Jian Zhao, Peng Chen, Sergey Prosandeev, Charles Paillard, Kinnary Patel, Jorge iniguez, Laurent Bellaiche
Summary: Ferroic materials exhibit a variety of degrees of freedom, such as structural distortions and magnetic moments, with cross couplings leading to interesting phenomena. Understanding these couplings is crucial for interpreting observed phenomena and making novel predictions. This review introduces a method for deriving energetic couplings without relying heavily on group theoretical language, using graphical techniques and symbolic language.
ADVANCED ELECTRONIC MATERIALS
(2022)
Article
Multidisciplinary Sciences
Peng Chen, Charles Paillard, Hong Jian Zhao, Jorge Iniguez, Laurent Bellaiche
Summary: This paper investigates the control of electric polarization in ferroelectric materials at room temperature. By conducting simulations, the authors reveal the reasons behind the observed transient partial reversal and propose a method to deterministically control the ferroelectric polarization using stimuli. These findings provide guidance for the development of novel ultrafast optoferroic devices.
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Diana Elisa Murillo-Navarro, Hugo Aramberri, Jorge Iniguez
Summary: By controlling the mechanical and electric boundary conditions, the electrocaloric effect of ferroelectric materials can be significantly enhanced, offering a potential solution for eco-friendly and efficient refrigeration technologies.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2023)
Review
Physics, Multidisciplinary
Javier Junquera, Yousra Nahas, Sergei Prokhorenko, Laurent Bellaiche, Jorge iniguez, Darrell G. Schlom, Long-Qing Chen, Sayeef Salahuddin, David A. Muller, Lane W. Martin, R. Ramesh
Summary: The past decade has witnessed significant progress in understanding emergent topological polar textures in oxide nanostructures, including vortices, skyrmions, merons, hopfions, dipolar waves, and labyrinthine domains. The discovery of low-dimensional ferroelectric oxide nanostructures has altered the perceived energy cost associated with the formation of these structures, allowing for manipulation of order parameters. This review provides a historical context, scientific description, and discussion of the potential applications and future challenges in this field.
REVIEWS OF MODERN PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Evgenios Stylianidis, Pranav Surabhi, Ruben Hamming-Green, Mart Salverda, Yingfen Wei, Arjan Burema, Sylvia Matzen, Tamalika Banerjee, Alexander Bjoerling, Binayak Mukherjee, Sangita Dutta, Hugo Aramberri, Jorge iniguez, Beatriz Noheda, Dina Carbone, Pavan Nukala
Summary: The unconventional and weak electromechanical response of ferroelectric capacitors based on Hf0.5Zr0.5O2 is investigated, and it is found that the piezoelectric response is suppressed above the coercive voltage, while a second-order effect is observed at higher voltages.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Physical
Claudio Cazorla, Massimiliano Stengel, Jorge Iniguez, Riccardo Rurali
Summary: We predict a significant variation in heat conductivity in SrMnO3 thin films near room temperature by applying small electric and/or magnetic fields based on first-principles simulations. This is caused by a phase transition that involves large changes in both magnetization and electric polarization, resulting in a relative heat conductivity variation of about 100%. These findings are attributed to the anharmonic spin-phonon couplings that strongly influence the mean lifetime of phonons.
NPJ COMPUTATIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Haidong Lu, Hugo Aramberri, Alexey Lipatov, Roger Proksch, Alexander Sinitskii, Jorge Iniguez, Alexei Gruverman
Summary: This study investigates the longitudinal piezoelectric coefficient in 2D ferroelectric 1T ''-MoS2 and finds that it exhibits negative piezoelectricity. The experimental results are supported by theoretical calculations.
ACS MATERIALS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Fernando Gomez-Ortiz, Hugo Aramberri, Juan M. Lopez, Pablo Garcia-Fernandez, Jorge iniguez, Javier Junquera
Summary: We report second-principles simulations on domains in (PbTiO3)n/(SrTiO3)n superlattices, finding that for certain thickness and lateral sizes the most stable configuration consists of polar domains separated by counter-rotating vortices acting as domain walls. The balance between domain wall energy and electrostatic energy results in an optimal domain period proportional to the square root of the PbTiO3 layer thickness, following the Kittel law. Molecular dynamics simulations reveal the spontaneous change of periodicity at finite temperature, leading to the formation of new domains initiated by vortices and antivortices.
Article
Materials Science, Multidisciplinary
Hugo Aramberri, Jorge Iniguez
Summary: Hafnia ferroelectrics exhibit promising technological potential and remarkable behaviors, but their theoretical description is challenging due to the variety of phases and unconventional properties found in these materials. This study proposes an approach based on an original reference phase to provide a unified description of the multiple low-energy polymorphs of Hafnia.
COMMUNICATIONS MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
John Mangeri, Davi Rodrigues, Monica Graf, Sudipta Biswas, Olle Heinonen, Jorge Iniguez
Summary: This paper proposes a continuum approach to study the magnetoelectric multiferroic BiFeO3, combining the ferroelectric phase field method and micromagnetic simulations. The modeling effort allows for the self-consistent description of the different order parameters on the same scale. The model is used to analyze the domain wall topology and the influence of FE domain boundaries on magnetic domain walls, as well as to simulate spin-wave transmission and magnetoelectric switching. The study provides insights for further research on nanostructures of BFO at the mesoscale.
Article
Materials Science, Multidisciplinary
Ningbo Fan, Jorge Iniguez, L. Bellaiche, Bin Xu
Summary: Based on first-principles calculations, this study investigates the electrocaloric effect in Nd-substituted BiFeO3 perovskite solid solutions, revealing a new mechanism for achieving anomalous electrocaloric effects by explicitly considering octahedral tiltings.
Article
Materials Science, Multidisciplinary
Natalya S. Fedorova, Dmitri E. Nikonov, Hai Li, Ian A. Young, Jorge Iniguez
Summary: In this paper, the simplest, lowest-order Landau-like potential for BiFeO3 and La-doped BiFeO3 is introduced, which is expanded in powers of polarization, FeO6 octahedral rotations, and strains. An analytical approach is presented for computing the model parameters from density-functional theory. The potentials for BiFeO3 and La0.25Bi0.75FeO3 are computed, and it is shown that the first-principles results are accurately captured, including properties that were not considered for the calculation of the model parameters. The computed models allow the identification and explanation of the main interactions controlling the relative stability of the competing low-energy phases of these compounds.
Article
Materials Science, Multidisciplinary
Hong Jian Zhao, Yanchao Wang, Yurong Yang, Yanming Ma, Laurent Bellaiche
Summary: This study explores how to control the Zeeman-type energy-level splitting of a two-level system in a material like calcium titanate (CaTiO3) using an electric field, aiming to achieve quantum information and quantum computation. The strategy for achieving this control is based on understanding the breakdown of specific nonsymmorphic symmetry elements by the electric field, affecting the nonspin degree of freedom of electrons in the material. Through first-principles simulations, a platform system of CaTiO3 under tensile strain is proposed as a candidate for achieving a large Zeeman-type energy-level splitting controllable by the electric field.
Article
Materials Science, Multidisciplinary
Alireza Sasani, Jorge Iniguez, Eric Bousquet
Summary: This study investigates the nonlinear magnetoelectric response of GdFeO3 through an analytical approach combined with a Heisenberg model fitted against first-principles calculations. It is shown that the nonlinear character of the response in these materials arises from the nonlinear change of antiferromagnetic order of Gd atoms under applied magnetic field.
Article
Materials Science, Multidisciplinary
Peng Liu, Yanchao Wang, Hong Jian Zhao, Laurent Bellaiche, Yanming Ma
Summary: This study identifies a controllable band splitting pattern in a ferromagnetic material based on the electron's orbital degree of freedom, providing a new avenue for designing magnetically based spin-orbitronic devices.
