Article
Physics, Multidisciplinary
Yue-Xin Huang, Xiaolong Feng, Hui Wang, Cong Xiao, Shengyuan A. Yang
Summary: We propose an intrinsic nonlinear planar Hall effect that is independent of scattering and scales with the second order of electric field and first order of magnetic field. This effect is less symmetry constrained and can be observed in a large class of nonmagnetic polar and chiral crystals. Combined with first-principles calculations, we demonstrate this effect in the Janus monolayer MoSSe and report experimentally measurable results. This work reveals a new intrinsic transport effect with potential applications in material characterization and nonlinear devices.
PHYSICAL REVIEW LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Yang Wang, Sivakumar V. Mambakkam, Yue-Xin Huang, Yong Wang, Yi Ji, Cong Xiao, Stephanie A. Law, John Q. Xiao
Summary: The observation of nonlinear planar Hall effect (NPHE) in Bi2Se3 films grown on magnetic insulator (MI) substrates is reported. It is found that the magnitude of NPHE is inversely proportional to carrier density, possibly due to the MPE-induced exchange gap opening and out-of-plane spin textures in the topological insulator (TI) surface states.
Article
Materials Science, Multidisciplinary
Wen Rao, Yong-Long Zhou, Yong-jia Wu, Hou-Jian Duan, Ming-Xun Deng, Rui-Qiang Wang
Summary: Recent studies have shown that the planar magnetic resistance effect in thin films of topological insulators is influenced by the tilt and shift of Dirac cones, resulting in distortions of spin texture and spin polarization, which serve as the origin of both linear and nonlinear planar Hall effect. The interplay of these mechanisms can dominate in different thicknesses of topological insulator films, providing insights into understanding the observed linear and nonlinear PHE in recent experiments.
Article
Physics, Multidisciplinary
Zhejunyu Jin, Xianglong Yao, Zhenyu Wang, H. Y. Yuan, Zhaozhuo Zeng, Weiwei Wang, Yunshan Cao, Peng Yan
Summary: It has been discovered that hidden nonlinear magnon transport in magnetic textures can generate fictitious magnetic fields. By analyzing the scattering features between magnons and skyrmions, a significant Hall angle in both confluence and splitting modes has been predicted, and it has been found that the Hall angle reverses its sign when switching the handedness of the incident magnons. This finding may open up new possibilities for probing gauge fields through nonlinear means.
PHYSICAL REVIEW LETTERS
(2023)
Article
Optics
Huifeng Chen, Guanyu Liu, Shuang Zhang, Yongchun Zhong, Jianhui Yu, Zhe Chen, Wenguo Zhu
Summary: The photonic spin Hall effect (SHE) is the transverse separation of spin photons in refraction and reflection phenomena. This study investigates the spin-orbit coupling (SOC) in nonlinear uniaxial crystals and demonstrates the SHE of second-harmonic photons. The generation and evolution processes of nonlinear spin photons within the crystal are visualized, and a high-speed modulation scheme for the SHE is proposed.
LASER & PHOTONICS REVIEWS
(2023)
Review
Materials Science, Multidisciplinary
Shuai Li, C. M. Wang, Z. Z. Du, Fang Qin, Hai-Zhou Lu, X. C. Xie
Summary: The perspective introduces the emergent 3D quantum Hall effects and nonlinear Hall effect, discussing their significance in advancing the understanding of Hall physics and exploring future research directions.
NPJ QUANTUM MATERIALS
(2021)
Article
Physics, Applied
Sonika, M. K. Hooda, Shailja Sharma, C. S. Yadav
Summary: The discovery of the planar Hall effect in topological semimetals has sparked widespread research interest. In a study on Cu intercalated type-II Dirac semimetal PdTe2, a positive field dependence of electrical resistivity was observed in both perpendicular and parallel field directions, causing non-zero anisotropy. The study suggests that the chiral anomaly may not be the origin of the planar Hall effect in materials with positive longitudinal magnetoresistance.
APPLIED PHYSICS LETTERS
(2021)
Article
Multidisciplinary Sciences
Z. Z. Du, C. M. Wang, Hai-Peng Sun, Hai-Zhou Lu, X. C. Xie
Summary: The nonlinear Hall effect is a quantum transport phenomenon where a voltage can be driven by two perpendicular currents, but a full quantum description is still lacking. The authors developed a complete quantum theory of the nonlinear Hall effect using diagrammatic technique, which will aid in exploring topological physics beyond the linear regime.
NATURE COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Chunjie Yan, Zui Tao, Zhenyu Gao, Zishuang Li, Xiao Xiao, Haozhe Wang, Lina Chen, Ronghua Liu
Summary: Achievement of topological spin textures in heavy-metal/ferromagnet multilayer films has attracted attention for their topological nature, emergent electromagnetic properties, and potential spintronics applications. However, the origin of the dome-shaped anomalous humps in anomalous Hall resistivity curves is manifold and needs to be carefully examined.
Article
Materials Science, Multidisciplinary
N. Kheirabadi, A. Langari
Summary: We investigate the quantum nonlinear planar Hall effect in bilayer graphene subjected to a steady in-plane magnetic field. In the presence of time-reversal symmetry breaking caused by the magnetic field, a charge current arises in the second-order response to an external electric field due to the Berry curvature dipole in momentum space. We demonstrate that the nonlinear planar Hall effect, originating from the orbital effect of an in-plane magnetic field on electrons in bilayer graphene, can occur even without spin-orbit coupling. By considering symmetry analysis, we determine the dominant dependence of the Berry curvature dipole moment on the magnetic field components. Furthermore, we illustrate how external planar magnetic field, gate voltage, and Fermi energy can be used to control and modulate the Berry curvature dipole.
Article
Materials Science, Multidisciplinary
Oleksii Maistrenko, Benedikt Scharf, Dirk Manske, Ewelina M. Hankiewicz
Summary: The study reveals that uniform magnetization in three-dimensional topological insulator Josephson junctions can induce asymmetry in the Andreev spectrum, leading to Majorana modes and the Josephson Hall effect. Magnetic control and gating can enable significant Josephson Hall currents compared to longitudinal currents.
Article
Multidisciplinary Sciences
Daniel Kaplan, Tobias Holder, Binghai Yan
Summary: Can a generic magnetic insulator exhibit a Hall current? We find that a general magnetic insulator possesses a nonlinear Hall conductivity quadratic to the electric field if the system breaks inversion symmetry, which can be identified as a new type of multiferroic coupling. This conductivity originates from an induced orbital magnetization due to virtual interband transitions. In contrast to the crystalline solid, we find that this nonlinear Hall conductivity vanishes for Landau levels of a 2D electron gas, indicating a fundamental difference between the QAHE and the integer quantum Hall effect.
NATURE COMMUNICATIONS
(2023)
Article
Physics, Multidisciplinary
Chong Wang, Yang Gao, Di Xiao
Summary: In this study, the intrinsic nonlinear Hall effect is identified as a significant contributor to detecting the reversal of the Neel vector, independent of relaxation time. The nonlinear Hall conductivity in the antiferromagnetic metal tetragonal CuMnAs can reach the order of mA/V2 and shows a qualitative dependence on the chemical potential. The survey of magnetic point groups provides guidelines for discovering more antiferromagnetic materials with intrinsic nonlinear Hall effect.
PHYSICAL REVIEW LETTERS
(2021)
Article
Multidisciplinary Sciences
Meizhen Huang, Zefei Wu, Jinxin Hu, Xiangbin Cai, En Li, Liheng An, Xuemeng Feng, Ziqing Ye, Nian Lin, Kam Tuen Law, Ning Wang
Summary: This study reports a significant breakthrough in the efficiency of nonlinear Hall generation in small-angle-twisted bilayer WSe2, reaching 1000 V-1, which is a hundred times higher than the previous records. The researchers explained this result through the correlation-induced continuous Mott transition effect.
NATIONAL SCIENCE REVIEW
(2023)
Article
Multidisciplinary Sciences
Jeongkeun Song, Taekoo Oh, Eun Kyo Ko, Ji Hye Lee, Woo Jin Kim, Yangyu Zhu, Bohm-Jung Yang, Yangyang Li, Tae Won Noh
Summary: The study demonstrates the detection and differentiation of cluster magnetic multipoles in antiferromagnetic materials using the planar Hall effect. By applying compressive strain, the researchers artificially induced cluster magnetic multipoles in Nd2Ir2O7, showing distinctive harmonics of the PHE oscillation under magnetic field rotation.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Multidisciplinary
Runrun Hao, Kun Zhang, Yinggang Li, Qiang Cao, Xueying Zhang, Dapeng Zhu, Weisheng Zhao
Summary: The study of spin-orbit torque (SOT) effect requires an effective method for probing current-induced magnetization switching. Existing methods for measuring in-plane magnetization switching either involve complicated fabrication processes or non-electric techniques. In this research, a reliable and convenient method is proposed, which involves analyzing the modified MR signal by a magnetic field to electrically probe SOT-induced in-plane magnetization switching. The feasibility of this method is demonstrated in various material combinations. This work simplifies the characterization process of in-plane magnetization switching and contributes to the development of SOT-based devices.
Article
Chemistry, Multidisciplinary
Chen Ye, Xiangnan Xie, Wenxing Lv, Ke Huang, Allen Jian Yang, Sicong Jiang, Xue Liu, Dapeng Zhu, Xuepeng Qiu, Mingyu Tong, Tong Zhou, Chuang-Han Hsu, Guoqing Chang, Hsin Lin, Peisen Li, Kesong Yang, Zhenyu Wang, Tian Jiang, Xiao Renshaw Wang
Summary: MnBi2Te4 is the first intrinsic magnetic topological insulator that exhibits novel magnetic and topological phenomena. Recent studies have found that the interaction between electrons and magnetism can be influenced by Mn-doped Bi2Te3 on the surface. In this work, we observe nonreciprocal transport in a bilayer of antiferromagnetic MBT and nonmagnetic Pt, confirming a correlation between nonreciprocity and intrinsic magnetism in the surface state of MBT.
Article
Nanoscience & Nanotechnology
Pan He, Gavin Kok Wai Koon, Hiroki Isobe, Jun You Tan, Junxiong Hu, Antonio H. Castro Neto, Liang Fu, Hyunsoo Yang
Summary: Graphene moire superlattices exhibit giant second-order nonlinear transports, both longitudinal and transverse, under zero magnetic field, originating from the skew scattering of chiral Bloch electrons. These findings provide an alternative means for inducing second-order transports in van der Waals heterostructures.
NATURE NANOTECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Weibin Chen, Runrun Hao, Shiyang Lu, Zhiqiang Cao, Shaohua Yan, Shishen Yan, Dapeng Zhu, Qunwen Leng
Summary: Seed layers have a significant impact on the exchange bias field and tunneling magnetoresistance ratio of magnetic tunnel junctions (MTJs). The Ta/Ru seed layer is beneficial for developing MTJ-based spintronic devices with high sensitivity and high stability.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Physics, Multidisciplinary
Dapeng Zhu, Tianrui Zhang, Xiao Fu, Runrun Hao, Amir Hamzic, Huaiwen Yang, Xueying Zhang, Hui Zhang, Ao Du, Danrong Xiong, Kewen Shi, Shishen Yan, Shufeng Zhang, Albert Fert, Weisheng Zhao
Summary: Recent studies have shown that antiferromagnetic insulators efficiently support spin current. In this study, we observe a strong temperature dependence and reversed sign of dampinglike spin-orbit torque (SOT) in Pt/NiO/CoFeB, which is different from the slight variation with temperature observed in Pt/CoFeB bilayer. The negative dampinglike SOT at low temperatures is proposed to be mediated by magnetic interactions tied to the "exchange bias" in Pt/NiO/CoFeB, in contrast to the thermal-magnon-mediated scenario at high temperatures. These results highlight the potential to control SOT by tuning the magnetic structure in multilayers.
PHYSICAL REVIEW LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Dongyan Zhao, Yubo Wang, Jin Shao, Yanning Chen, Zhen Fu, Qingtao Xia, Shuaipeng Wang, Xiuwei Li, Guangzhi Dong, Min Zhou, Dapeng Zhu
Summary: This paper investigates the temperature dependence and performance of serial magnetic tunnel junctions (MTJs) on 8-inch wafers. The results show that the properties of serial MTJs are consistent with individual MTJ devices, indicating their suitability for studying the magnetic tunneling properties of MTJ stacks.
Article
Nanoscience & Nanotechnology
Rui-Hao Li, Pengtao Shen, Steven S-L Zhang
Summary: We theoretically demonstrate that class-I topological Dirac semimetals can provide a platform for electrically and magnetically tunable spin-charge conversion, with significant tunability and high efficiency.
Article
Physics, Multidisciplinary
Soho Shim, M. Mehraeen, Joseph Sklenar, Junseok Oh, Jonathan Gibbons, Hilal Saglam, Axel Hoffmann, Steven S-L Zhang, Nadya Mason
Summary: Recent studies have shown that a moderate change in the spin orientation of a collinear antiferromagnet can have a significant effect on the electronic band structure. In this study, unidirectional magnetoresistance (UMR) was observed in the antiferromagnetic phase of a FeRh/Pt bilayer. The researchers found that field-induced spin canting greatly enhances the UMR effect.
Article
Chemistry, Multidisciplinary
Shaohua Yan, Weibin Chen, Zitong Zhou, Zhi Li, Zhiqiang Cao, Shiyang Lu, Dapeng Zhu, Weisheng Zhao, Qunwen Leng
Summary: This study investigates the impact of seed layer thickness on the magnetic properties of giant magnetoresistance thin films. A new synthetic spin valve film structure and magnetic properties were discovered, providing a new way to control the perfection of film texture.
Article
Nanoscience & Nanotechnology
Runrun Hao, Kun Zhang, Weibin Chen, Junda Qu, Shishou Kang, Xueying Zhang, Dapeng Zhu, Weisheng Zhao
Summary: In this study, the significant role of interfacial spin-orbit coupling (SOC) in spin-to-charge conversion (SCC) process in Pt/NiFe heterostructure was investigated. The spin-pumping experiment showed that the spin-pumping signal decreased when the magnetization of NiFe switched from the saturated state to the unsaturated state. Theoretical analysis revealed that the interfacial spin absorption was enhanced during this magnetization change, resulting in the changes of spin flow in the Pt layer and across the Pt/NiFe interface. These findings highlight the importance of interfacial SOC in SCC process in HM/FM heterostructures.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Physics, Multidisciplinary
Danrong Xiong, Yuhao Jiang, Daoqian Zhu, Ao Du, Zongxia Guo, Shiyang Lu, Chunxu Wang, Qingtao Xia, Dapeng Zhu, Weisheng Zhao
Summary: Topological magnetotransport in non-collinear antiferromagnets has sparked interest due to exotic phenomena. This study investigates the magnetotransport properties of the widely used antiferromagnetic material Ir20Mn80. Remarkable anomalous Hall effect, anisotropic and negative magnetoresistance were observed, along with nontrivial electronic band structures. These findings highlight the potential of Ir20Mn80 for exploring topological antiferromagnetic physics and spintronics applications.
Article
Physics, Applied
Hui Zhang, Zengtai Zhu, Yungu Zhu, Xiaobing Chen, Qisheng Jiang, Jinwu Wei, Chenbo Zhao, Jine Zhang, Furong Han, Huaiwen Yang, Dapeng Zhu, Hao Wu, Yuansha Chen, Fengxia Hu, Baogen Shen, Weisheng Zhao, Jing Zhang, Guoqiang Yu, Jirong Sun
Summary: This study investigates metallic 2DEGs in gamma-Al2O3/KTaO3 heterostructures and explores the impact of Fermi level on charge-to-spin conversion. The results show that optimizing the Fermi level can greatly enhance the conversion efficiency.
PHYSICAL REVIEW APPLIED
(2023)
Review
Multidisciplinary Sciences
Danrong Xiong, Yuhao Jiang, Kewen Shi, Ao Du, Yuxuan Yao, Zongxia Guo, Daoqian Zhu, Kaihua Cao, Shouzhong Peng, Wenlong Cai, Dapeng Zhu, Weisheng Zhao
Summary: This paper provides a comprehensive description of antiferromagnetic spintronics applications, including interface coupling, read-out operations, and writing manipulations. It discusses the early use of antiferromagnets in magnetic recordings and MRAM, and reviews the latest mechanisms of manipulation and detection of antiferromagnets. The paper introduces a high-performance EB-MRAM as the next generation of antiferromagnet-based memories based on exchange bias manipulation.
FUNDAMENTAL RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
M. Mehraeen, Steven S. -L. Zhang
Summary: This study predicts the existence of spin anomalous-Hall unidirectional magnetoresistance (AH-UMR) in conducting bilayers composed of a ferromagnetic layer and a nonmagnetic layer, which is different from the well-studied unidirectional spin-Hall magnetoresistance and is mainly derived from the spin anomalous Hall effect in the ferromagnetic layer. It is found that the charge-spin conversion induced by the spin anomalous Hall effect and the structural inversion asymmetry generate a net nonequilibrium spin density in the ferromagnetic layer, which modulates the resistance of the bilayer when the direction of the applied current or the magnetization is reversed.
Article
Materials Science, Multidisciplinary
Jing Zhang, Jine Zhang, Xiang Chi, Runrun Hao, Weibin Chen, Huaiwen Yang, Dapeng Zhu, Qinghua Zhang, Weisheng Zhao, Hui Zhang, Jirong Sun
Summary: This research shows that a charge current flowing along the LTO/STO interface can efficiently generate a spin current, resulting in a high conversion efficiency of charge-to-spin.
