Article
Materials Science, Multidisciplinary
Jingjuan Su, Yihang Bai, Puyuan Shi, Yufei Tu, Bing Wang
Summary: Recent experiments have shown that two-dimensional (2D) magnetism has attracted strong interest in advanced spintronics applications. However, the limited Curie temperature and magnetic anisotropy energy (MAE) hinder their potential applications. Through density functional theory calculations, we have predicted a stable 2D monolayer of Na3VAs2, which exhibits intrinsic ferromagnetic (FM) order and a high MAE (570 μeV per V atom). Monte Carlo simulation reveals that this monolayer has a Curie temperature (TC) of up to 305 K based on anisotropic Heisenberg mode. In addition, the 2D Na3VAs2 monolayer exhibits ideal half-metallic properties, which are maintained under various strains, and possesses good dynamic, thermal, and mechanical stability. The exceptional properties of the Na3VAs2 monolayer make it a promising candidate for spintronic devices.
RESULTS IN PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Hongyu Chen, Peizhe Tang, Jia Li
Summary: Using density functional theory, monolayer vanadium oxyhydroxide (VOOH) and chromium oxyhydroxide (CrOOH) are predicted as 2D ferromagnetic semiconductors with excellent stability. They exhibit differences in ferromagnetic ordering, critical temperature, and magnetic anisotropy due to the varying occupancy of d electrons between V3+ and Cr3+ ions, making them suitable candidates for investigating 2D ferromagnets.
Article
Engineering, Electrical & Electronic
Zhaoyong Guan, Shuang Ni
Summary: The FeI3 monolayer is found to be a semiconductor with intrinsic ferromagnetism, exhibiting perpendicular magnetic anisotropy and large magnetic anisotropy energy. Under strain, it can transition from ferromagnetic to antiferromagnetic state, showing potential for magnetic phase transitions and controllable magnetoelectric properties.
ACS APPLIED ELECTRONIC MATERIALS
(2021)
Article
Physics, Multidisciplinary
Chunyan Xu, Meixuan Li, Yanjie Wang
Summary: A new tetragonal Janus Cr2PAs monolayer with intrinsic ferromagnetism, high Curie temperature, and controllable magnetic anisotropy is proposed based on first-principles calculations. This material exhibits a band gap of 0.718 eV and a predicted Curie temperature of 794 K. The magnetization easy axis changes with hole doping, and the perpendicular magnetic anisotropy increases with hole concentration. The high Curie temperature and controllable magnetic anisotropy make Janus Cr2PAs monolayer a promising candidate for practical spintronic applications.
Article
Chemistry, Multidisciplinary
Jiangbin Wu, Yu Yao, Miao-Ling Lin, Malte Rosner, Zhonghao Du, Kenji Watanabe, Takashi Taniguchi, Ping-Heng Tan, Stephan Haas, Han Wang
Summary: In this work, the spin-phonon coupling (SPC) in monolayer chromium tribromide is investigated using Raman spectroscopy and first principle calculations. The experimental and numerical results show good agreement in terms of Curie temperature and phonon shifts. It is demonstrated how magnetic exchange interactions affect phonon vibrations, providing design fundamentals for 2D magnetic materials and related devices.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Zhong Lin, Bevin Huang, Kyle Hwangbo, Qianni Jiang, Qi Zhang, Zhaoyu Liu, Zaiyao Fei, Hongyan Lv, Andrew Millis, Michael McGuire, Di Xiao, Jiun-Haw Chu, Xiaodong Xu
Summary: The study on thickness-dependent magnetism of vanadium triiodide (VI3) reveals robust ferromagnetism in all thin layers, with large coercive fields even in monolayers. In contrast to other vdW magnets, VI3 shows an anomalous increase in Curie temperature as the layer number decreases, reaching a maximum of 60 K in monolayers.
Article
Materials Science, Multidisciplinary
Xiaotian Fang, Baozeng Zhou, Xiaocha Wang, Wenbo Mi
Summary: In this study, the electronic structure and magnetic properties of a two-dimensional (2D) OsI3 monolayer were investigated using first-principles calculations. The results show that the monolayer exhibits various orbital orderings and magnetic states, and can be modulated by strain to control magnetic anisotropy and Curie temperature, indicating its potential application in spintronics.
MATERIALS TODAY PHYSICS
(2022)
Article
Physics, Multidisciplinary
Guibo Zheng, Shuixian Qu, Wenzhe Zhou, Fangping Ouyang
Summary: In this study, a new Janus TaNF monolayer with excellent piezoelectric properties and intrinsic valley splitting is predicted. This is due to the spontaneous spin polarization, the spatial inversion symmetry breaking, and strong spin-orbit coupling. TaNF also shows potential as a 2D magnetic material with high Curie temperature and large magnetic anisotropy energy. Biaxial strain can effectively control the band gap and tune the magnitude of valley splitting. Curie temperature reaches 373 K under -3% biaxial strain, indicating potential high-temperature applications for spintronic and valleytronic devices.
FRONTIERS OF PHYSICS
(2023)
Article
Physics, Applied
Jinlin Xu, Xiaokun Huang, Jiangnan Hu, Yunying Mo, Xin Nie, Chao Chen, Guang Song, Jiaqian Liu, Liang Liu, Xiangping Jiang, Jun-Ming Liu
Summary: In recent years, enhancing the magnetic ordering temperature of two dimensional (2D) magnetic materials has become an urgent issue. This study proposes a V-implanted CrI3 monolayer and investigates its ferrimagnetic (FiM) ordering under in-plane (IP) biaxial strains. It is found that the V-(CrI3)2 monolayer can transform from stripe-type antiferromagnetic (AFM) insulator to FiM half-metal with a net magnetic moment of 5.0 mu(B)/f.u. aligned in parallel to the ab-plane under -3% IP biaxial strain, and the Tc of the FiM state can be raised to room temperature under -5% IP biaxial strain. This work suggests that IP strain engineering combined with spin implantation can be an alternative strategy for enhancing 2D magnetism.
APPLIED PHYSICS LETTERS
(2023)
Article
Multidisciplinary Sciences
Amilcar Bedoya-Pinto, Jing-Rong Ji, Avanindra K. Pandeya, Pierluigi Gargiani, Manuel Valvidares, Paolo Sessi, James M. Taylor, Florin Radu, Kai Chang, Stuart S. P. Parkin
Summary: Researchers have recently built a nearly ideal easy-plane system and observed robust ferromagnetic ordering on a single CrCl3 monolayer on graphene/6H-SiC(0001), exhibiting critical scaling characteristic of a 2D-XY system. This realization of a finite-size Berezinskii-Kosterlitz-Thouless phase transition in a large-area, quasi-free-standing van der Waals monolayer magnet with an XY universality class offers a material platform for 2D superfluid spin transport and topological magnetic textures.
Article
Chemistry, Physical
Xuli Wang, Huimin Guo, Hua Chen, Ling Yan, Jingjing Xie, Yehui Zhang, Jin Lv, Haishun Wu
Summary: Based on first-principles calculations, this study predicts the electronic structures and magnetic properties of non-equivalent alloying compounds CrMnI6 monolayer, finding it to be a dynamically and thermally stable half-metal material with a large in-plane MAE and high Curie temperature. Furthermore, the half-metallicity of CrMnI6 monolayer can be maintained under carrier doping and strain, and the in-plane MAE can be further improved through hole doping and tensile strain. The origin of the large in-plane MAE of CrMnI6 monolayer is explained by the couplings between different spin channels of I atom and the same spin channel of Mn and Cr atoms. This novel 2D FM half-metal material shows potential for applications in high-performance spintronic nanodevices and magnetic recording and sensors.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
Ying Zhao, Qinxi Liu, Xue Jiang, Jijun Zhao
Summary: This study proposes a two-dimensional material, VNI, with both ferromagnetism and ferroelasticity. The dynamic, mechanical, and thermal stabilities of VNI are confirmed through calculations and simulations. The VNI monolayer exhibits a sizable in-plane magnetic anisotropic energy and a moderate ferroelastic switching barrier, with the magnetic anisotropy axis being adjustable through reversible ferroelastic strain. These findings provide insights for the design of nonvolatile-memory devices.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Rongjie Zhang, Yongjue Lai, Wenjun Chen, Changjiu Teng, Yujie Sun, Liusi Yang, Jingyun Wang, Bilu Liu, Hui-Ming Cheng
Summary: The use of wrinkles in monolayer 2D semiconductors as controllable carrier trapping centers enables multilevel storage capability, high on/off ratios, and long retention times in memory devices. The study also reveals a wrinkle-based carrier trapping mechanism, offering a new approach for controlling carriers in ultra-thin memory devices and for in-memory calculations.
Article
Chemistry, Multidisciplinary
Bing Wang, Yaxuan Wu, Yihang Bai, Puyuan Shi, Guangbiao Zhang, Yungeng Zhang, Chang Liu
Summary: In this study, the triaxial magnetic anisotropic properties of a ferromagnetic semiconductor CrSBr monolayer were investigated by the first-principles method. The results showed that the triaxial magnetic anisotropy originated from the coexistence of the magnetic dipole-dipole interaction (shape anisotropy) and the spin-orbit coupling interaction (magnetocrystalline anisotropy). The dominant contribution to the magnetic anisotropy was found to be from the shape anisotropy. Furthermore, the easy magnetic axes and ferromagnetism in the CrSBr monolayer could be manipulated by strains, especially the uniaxial strain in the x direction.
Review
Chemistry, Multidisciplinary
Anastasios V. Papavasileiou, Melita Menelaou, Kalyan J. Sarkar, Zdenek Sofer, Lakshminarayana Polavarapu, Stefanos Mourdikoudis
Summary: The ferromagnetism in 2D materials has great potential to enhance existing properties and create new characteristics. This review focuses on recent advances and perspectives of 2D materials with at least one ferromagnetic element, discussing their magnetic properties, applications, and future development.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Shengli Zhuang, Lingwen Liao, Jinyun Yuan, Nan Xia, Yan Zhao, Chengming Wang, Zibao Gan, Nan Yan, Lizhong He, Jin Li, Haiteng Deng, Zhaoyong Guan, Jinlong Yang, Zhikun Wu
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2019)
Article
Chemistry, Multidisciplinary
Chipeng Xie, Xiuli Hu, Zhaoyong Guan, Xiaodong Li, Fuhua Zhao, Yuwei Song, Yuan Li, Xiaofang Li, Ning Wang, Changshui Huang
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2020)
Article
Chemistry, Multidisciplinary
Zhaoyong Guan, Shuang Ni, Shuanglin Hu
Article
Chemistry, Physical
Zhaoyong Guan, Shuang Ni
Summary: 2D FeX3 (X = F, Cl, Br, and I) with intrinsic ferromagnetism and different semiconductor characteristics have been successfully fabricated, showing potential applications in electronics and spintronics. Charge doping can alter their magnetic properties, making them versatile materials for various technological advancements.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Yi Zhou, Jiamei Liu, Hui Li, Heng Zhang, Zhaoyong Guan, Yanyan Jiang
Summary: The research combines quantum chemistry calculation and molecular dynamics simulation to study the self-assembly process of glycolipid-based hydrogels. Different gel morphologies were observed by varying water content, with hydrogen bonds identified as the main driving force of gelation.
Article
Clinical Neurology
Julia Rubione, Sandra M. Sbrascini, Bernardo Miguel, Candelaria Leiguarda, Maria F. Coronel, Carly J. McCarthy, Alejandro Montaner, Marcelo J. Villar, Pablo R. Brumovsky
Summary: Despite existing knowledge and therapeutic strategies, managing postoperative pain is challenging. This preclinical study suggests that pre-emptive administration of IMT504, a noncoding, non-CpG oligodeoxynucleotide with immunomodulatory properties, can decrease postoperative pain and reduce the need for opioids.
Article
Chemistry, Physical
Zhaoyong Guan, Linhui Lv, Ziyuan An, Ya Su, Yanyan Jiang, Xuming Wu, Shuang Ni
Summary: Co2Ge2Te6 exhibits intrinsic ferromagnetism due to superexchange interaction between Co and Te atoms, with a Curie temperature of 161 K. The monolayer is a half-metal and the bilayer shows ferromagnetic half-metallicity independent of stacking orders. Multilayers show ferromagnetic half metal property, with magnetoelectronic properties depending on stacking patterns in thinner multilayers. The magnetoelectronic properties of bulk and multilayers are determined by super-super exchange and weak van der Waals interaction. Co2Ge2Te6 monolayer and multilayers also demonstrate good dynamical and thermal stability, making them potential candidates for spintronics applications.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Engineering, Electrical & Electronic
Zhaoyong Guan, Linhui Lv, Ziyuan An, Yanyan Jiang, Ya Su
Summary: Based on a systematic research of CrGeTe3 (CGT) bilayers and multilayers with the self-intercalated (SI) Cr(Cr-SI) atom, self-intercalation can enhance interlayer magnetic coupling, resulting in a super-exchange interaction between interlayers. The CGT bilayer keeps half-metallicity with the interlayer ferromagnetic (FM) order after Cr's self-intercalation. Moreover, SI-CGT multilayers with interlayer FM order transform from HMs into normal spin-polarized metals, as the states at the Fermi level increase. These findings offer a promising way to manipulate the interlayer exchange interaction and magnetoelectric properties of CGT multilayers and other vdW magnets.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Zhaoyong Guan, Shuang Ni
Summary: The FeI3 monolayer is found to be a semiconductor with intrinsic ferromagnetism, exhibiting perpendicular magnetic anisotropy and large magnetic anisotropy energy. Under strain, it can transition from ferromagnetic to antiferromagnetic state, showing potential for magnetic phase transitions and controllable magnetoelectric properties.
ACS APPLIED ELECTRONIC MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Zhaoyong Guan, Nannan Luo, Shuang Ni, Shuanglin Hu
MATERIALS ADVANCES
(2020)
Article
Nanoscience & Nanotechnology
Zhaoyong Guan, Shuang Ni
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Chemistry, Multidisciplinary
Zhaoyong Guan, Shuang Ni
Article
Chemistry, Physical
Mohammed M. Obeid, C. Stampfl, A. Bafekry, Z. Guan, H. R. Jappor, C. Nguyen, M. Naseri, D. M. Hoat, N. N. Hieu, A. E. Krauklis, Tuan V Vu, D. Gogova
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2020)
Article
Chemistry, Multidisciplinary
Leining Zhang, Jichen Dong, Zhaoyong Guan, Xiuyun Zhang, Feng Ding
