Article
Chemistry, Multidisciplinary
Jun-young Kim, Joel Cramer, Kyujoon Lee, Dong-Soo Han, Dongwook Go, Pavel Salev, Pavel N. Lapa, Nicolas M. Vargas, Ivan K. Schuller, Yuriy Mokrousov, Gerhard Jakob, Mathias Klaeui
Summary: This study investigates current-induced spin-orbit torques in VO2/NiFe heterostructures and reveals that the change in spin absorption across the VO2 phase transition leads to a twofold increase in the Gilbert damping parameter alpha with temperature. Furthermore, a significant modulation and sign change of the current-induced spin-orbit torque across the VO2 phase transition suggest the existence of two competing spin-orbit torque generating mechanisms.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Multidisciplinary Sciences
Minkyung Kim, Zihao Wang, Yihao Yang, Hau Tian Teo, Junsuk Rho, Baile Zhang
Summary: Researchers have designed and demonstrated a 3D photonic topological insulator (PTI) that exhibits self-guided topological surface states without the need for additional confinement. By removing spin-orbit coupling, this PTI opens new possibilities for manipulating photons at the outer surface of photonic bandgap materials.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Xiaoming Zhang, Jiale Liu, Feng Liu
Summary: This study generalizes the effective p-wave theory to antisymmetric SOC (ASOC) and demonstrates that various 2D crystals can facilitate the desired ASOC. 314 TSC candidate materials are discovered by screening 2D material databases.
Article
Materials Science, Multidisciplinary
Daniel A. Bonilla, Jorge David Castano-Yepes, A. Martin-Ruiz, Enrique Munoz
Summary: In this research, the electromagnetic coupling of a heterostructure made of a topological insulator and a single graphene layer with ionized impurities is studied. The topological effects of the magnetoelectric polarizability of the topological insulator and its relative dielectric permittivity are explored on the electrical conductivity of graphene at low temperatures.
Article
Physics, Applied
Nguyen Huynh Duy Khang, Takanori Shirokura, Tuo Fan, Mao Takahashi, Naoki Nakatani, Daisuke Kato, Yasuyoshi Miyamoto, Pham Nam Hai
Summary: Topological insulators (TIs) are potential materials for spin-orbit torque (SOT) switching due to their large spin Hall angle. This study investigated SOT magnetization switching in both thermal activation and fast switching regimes using BiSb topological insulator. The results show differences in zero-Kelvin threshold switching current density for the two regimes, and suggest the potential of BiSb thin film for ultra-low power and fast operation of SOT-based spintronic devices.
APPLIED PHYSICS LETTERS
(2022)
Article
Multidisciplinary Sciences
Martin Claassen, Lede Xian, Dante M. Kennes, Angel Rubio
Summary: The study predicts that twisted bilayers of ZrS2 with the group-IV metal Zr can form an emergent moire Kagome lattice with strong spin-orbit coupling, leading to novel topological quantum phases dominated by strong spin-orbit interactions. At small twist angles, ZrS2 heterostructures give rise to an emergent and twist-controlled moire Kagome lattice, combining geometric frustration and strong spin-orbit coupling to realize a moire quantum spin Hall insulator with highly controllable and nearly-dispersionless bands.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Hongwei Xue, Wenxing Lv, Di Wu, Jialin Cai, Zhihao Ji, Yu Zhang, Zhongming Zeng, Qingyuan Jin, Zongzhi Zhang
Summary: This study investigates the temperature-dependent spin-orbit torque efficiencies in topological insulators, showing a significant enhancement at lower temperatures due to improved spin-polarized surface states. The findings provide insights into spin transport mechanisms and robust charge-spin conversion in TIs.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Tianhui Li, Lin Liu, Zehan Chen, Wei Jia, Jianxin Ye, Xudong Cai, Doudou Huang, Wanshan Li, Fukang Chen, Xinjun Li, Jiahao Chen, Boxi Dong, Hang Xie, Anyuan Pan, Chao Zhi, Hongyu An
Summary: Studying the mechanism of the spin Hall effect in Pt/Tm3Fe5O12 heterostructures, we demonstrate the intrinsic contribution in the moderately dirty regime is responsible for the generation of this spin Hall effect, through tuning the properties of Pt and investigating the efficiency of spin-orbit torque generation.
Article
Chemistry, Multidisciplinary
Qi Gong, Guiling Zhang
Summary: This study investigates the electronic structures and stability of organic-group functionalized antimony and bismuth monolayers. The results show that these materials have a large electronic band-gap and nontrivial topology, making them suitable for spintronic devices based on the quantum spin Hall effect at room temperature.
Article
Multidisciplinary Sciences
Jingyuan Zhong, Ming Yang, Zhijian Shi, Yaqi Li, Dan Mu, Yundan Liu, Ningyan Cheng, Wenxuan Zhao, Weichang Hao, Jianfeng Wang, Lexian Yang, Jincheng Zhuang, Yi Du
Summary: Weak topological insulators with tunable topological states are studied using ARPES and first-principles calculations. The authors find signatures of layer-selective quantum spin Hall channels in a candidate weak topological insulator, Bi4Br2I2, which is stacked by three different quantum spin Hall insulators. The energy gap at the crossing points of different Dirac cones, induced by interlayer interaction, enables the tunability of topological edge states. This work offers a perspective for constructing tunable quantized conductance devices for future spintronic applications.
NATURE COMMUNICATIONS
(2023)
Article
Physics, Condensed Matter
Yuan Yang, Wenting Zhou, Changrong Shu, Xiaobing Li
Summary: We investigate the topological phases in a ruby lattice by considering the effects of intrinsic spin-orbit coupling, Rashba spin-orbit coupling, and an exchange field. The combination of Rashba coupling and exchange field leads to the quantum anomalous Hall effect with a non-zero Chern number. We show that varying the exchange field drives interesting topological phase transitions between different topological insulating phases, including the quantum spin Hall insulator with spin Chern number Cs = ±1, and the quantum anomalous Hall insulator with Chern number C = ±1 and C = ±2. Particularly, high Chern number quantum anomalous Hall phases with C = -4 and C = 6 can be realized by tuning the strength of the exchange field. Each phase transition is accompanied by the closing of the bulk gap. Furthermore, we find a new topological phase that exhibits the electronic characteristics of both the quantum spin Hall effect and the quantum anomalous Hall effect. The band structures of the edge states confirm the classification of various topological gapped phases.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Materials Science, Multidisciplinary
Runhan Li, Ning Mao, Linke Cai, Yingxi Bai, Baibiao Huang, Ying Dai, Chengwang Niu
Summary: In this study, the authors propose that ferroelectric switching can be used to control the topological phase transition between Z2 topological insulators and higher-order topological insulators. They identify a potential material candidate for this transition and highlight the significance of this research for the fields of topological physics and materials.
Review
Chemistry, Multidisciplinary
Gang Qiu, Hung-Yu Yang, Su Kong Chong, Yang Cheng, Lixuan Tai, Kang L. Wang
Summary: Magnetic topological insulators (MTIs) are materials that combine topological band structures with magnetism, offering new opportunities for technological advancements. This paper reviews the mainstream MTI material platforms and highlights recent developments in modulating topological properties in MTIs through various means. The manipulation of topological phases in MTIs provides an exciting avenue for fundamental research and practical applications.
Article
Materials Science, Multidisciplinary
Jing-Yang You, Xue-Juan Dong, Bo Gu, Gang Su
Summary: This study reveals a topological phase transition in a MnBi2Te4 monolayer and demonstrates the tuning of magnetic properties by applying an electric field, enhancing the magnetic anisotropy energy and Curie temperature. Additionally, the proposal of two Janus materials capable of realizing the QAHE effect provides a new direction for research in ferromagnetic semiconductors.
Article
Multidisciplinary Sciences
Rui Wang, Tigran A. Sedrakyan, Baigeng Wang, Lingjie Du, Rui-Rui Du
Summary: Correlation and frustration are important in physics, leading to new quantum phases. In this study, we observe the moat-band phenomena in shallowly inverted InAs/GaSb quantum wells, where we find an unconventional time-reversal-symmetry breaking excitonic ground state. We demonstrate the evolution from helical-like to chiral-like edge transport and explain our experimental observations using a moat band for excitons that results from density imbalance.
Article
Chemistry, Multidisciplinary
Yuwei Zhao, Yongbin Zhu, Feng Jiang, Yiyao Li, You Meng, Ying Guo, Qing Li, Zhaodong Huang, Shaoce Zhang, Rong Zhang, Johnny C. Ho, Qianfan Zhang, Weishu Liu, Chunyi Zhi
Summary: Weyl semimetal Co3Sn1.8S2 as a cathode material for AZIBs exhibits excellent performance in Zn-ion transport and storage capabilities. By introducing Sn vacancies, the material enhances Zn2+ transfer channels and active sites, promoting charge storage kinetics.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Yunhao Wang, Jingwen Zhou, Chao Lin, Bo Chen, Zhiqiang Guan, Amani M. Ebrahim, Guannan Qian, Chenliang Ye, Lin Chen, Yiyao Ge, Qinbai Yun, Xixi Wang, Xichen Zhou, Gang Wang, Kedi Li, Pengyi Lu, Yangbo Ma, Yuecheng Xiong, Tianshuai Wang, Long Zheng, Shengqi Chu, Ye Chen, Bin Wang, Chun-Sing Lee, Yijin Liu, Qianfan Zhang, Zhanxi Fan
Summary: This work presents a facile one-pot solvothermal method for the synthesis of ultrathin 2D Ru-M (M = Co, Ni, and Cu) nanosheets, which can be used as cathode catalysts for Li-CO2 batteries. The RuCo nanosheets demonstrate excellent catalytic performance with low charge voltage, small overpotential, and high energy efficiency. The study indicates the feasibility of improving the electrochemical performance of Li-CO2 batteries through the in-plane metal alloy sites of ultrathin 2D alloy nanomaterials.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Yiyao Li, Dominik Legut, Xiaopeng Liu, Chao Lin, Xiang Feng, Ziqi Li, Qianfan Zhang
Summary: The study demonstrates that introducing vacancies can induce multiferroic behavior in low-dimensional ferromagnets and has a modulation effect on multiple magnetic parameters. Vacancies modulate the super exchange interaction through lattice distortion, thereby altering the ferromagnetic coupling.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Xiaopeng Liu, Dominik Legut, Qianfan Zhang
Summary: This study systematically investigates the effect of spin-orbit coupling in the Cu-nickelocene-Cu magnetic molecular junction through theoretical modeling and calculations. The strain effect on the magnetic anisotropy energy is also explored. The research demonstrates that tensile strain can cause an abnormal increase in the magnetic anisotropy energy, and the shift of the deep energy level and the change of the composition of d-orbitals in the hybrid molecular orbitals are key factors determining the strength of the spin-orbit coupling.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Materials Science, Multidisciplinary
Jiale Qu, Chao Ning, Xiang Feng, Bonan Yao, Bo Liu, Ziheng Lu, Tianshuai Wang, Zhi Wei Seh, Siqi Shi, Qianfan Zhang
Summary: SiO-based materials have potential applications as alloys and conversion-type anode materials for lithium-ion batteries, as well as excellent dendrite-proof layers for lithium-metal batteries. Through first-principle calculations, three new thermodynamically stable phases (Li2SiO5, Li4SiO6, and Li4SiO8) were discovered, and it was found that Li2SiO5 and Li4SiO8 phases possess metallic properties with high electronic conductivity. The mechanical strength of Li-Si-O phases was also found to be higher than lithium metal, and the dominant diffusion mechanism in the Li-Si-O ternary systems is interstitial Li hopping.
ENERGY & ENVIRONMENTAL MATERIALS
(2022)
Article
Chemistry, Physical
Ziqi Li, Shujun Liu, Xiaopeng Liu, Qian Zhang, Chao Lin, Xuehua Guo, Yitao Li, Xiang Feng, Sen Dong, Qianfan Zhang
Summary: Using density functional theory-based screening method, high-performance adsorbents for desulfurization were discovered among metal-organic framework materials (MOFs). These results highlight the importance of the structure-performance relationship in adsorption desulfurization.
Article
Chemistry, Physical
Fulai Liu, Yanyan He, Xiaopeng Liu, Zhuan Wang, Hong-Lai Liu, Xiang Zhu, Chun-Chao Hou, Yuxiang Weng, Qianfan Zhang, Yong Chen
Summary: This research presents a strategy of built-in control of donor-acceptor interactions to regulate excitonic effects in benzobisthiazole-bridged covalent organic frameworks, leading to accelerated exciton dissociation and enhanced photocatalytic activity for H2 evolution.
Article
Materials Science, Multidisciplinary
Xiang Feng, Qianfan Zhang, Zhi Wei Seh
Summary: This article discusses the application of automated computational workflows in high-throughput research of battery materials. It first introduces the concept of automated computational workflows and commonly used workflow managers, then presents the latest methods and works to build such automated workflows, and provides an outlook on the existing challenges and future directions in this field.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Chemistry, Multidisciplinary
Chao Lin, Xiang Feng, Dominik Legut, Xiaopeng Liu, Zhi Wei Seh, Ruifeng Zhang, Qianfan Zhang
Summary: This study presents an automated high-throughput workflow for screening high-efficiency photocatalytic OER catalysts. Through thermodynamic and photophysical property investigations, specific materials like β-ZrSi2N4 and β-HfSi2N4 are identified as efficient catalysts.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Qinfu Zhao, Jianpeng Guo, Mengyu Su, Bingbing Suo, Haiyan Zhu, Bo Zhou, Zhiyong Zhang, Qi Song
Summary: This study considers the influence of attempt frequency on ionic conductivity, calculates the attempt frequencies of carrier migrations in Na3OBH4 and Na3OBr using density functional theory, and investigates the effect of substituting Br- with the [BH4](-) anion on the conductivity of sodium cations.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Multidisciplinary Sciences
Shaoping Zhan, Tao Hong, Bingchao Qin, Yingcai Zhu, Xiang Feng, Lizhong Su, Haonan Shi, Hao Liang, Qianfan Zhang, Xiang Gao, Zhen-Hua Ge, Lei Zheng, Dongyang Wang, Li-Dong Zhao
Summary: Significant progress has been made in p-type SnS thermoelectric compounds, but the development of n-type counterparts has been stagnant, hindering the advancement of thermoelectric devices. In this study, n-type sulfide PbSnS2 with a similar structure to SnS was successfully synthesized through Pb alloying and demonstrated high performance. This material exhibits excellent thermoelectric properties and low thermal conductivity, making it a potential candidate to match the p-type SnS and play a crucial role in the field of thermoelectric devices.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Ziqi Li, Ruilin Dong, Xiaopeng Liu, Chao Lin, Yiyao Li, Xiang Feng, Zhi Wei Seh, Qianfan Zhang
Summary: This study adopts high-throughput computational methods to screen stable, eco-friendly and highly efficient MOFs catalysts for NH3-SCR. Mo-MOF (epsilon(trim)4/3) is found to exhibit the lowest over potential and a good catalytic effect. This work provides an effective catalyst screening strategy for future experimental studies.
Article
Materials Science, Multidisciplinary
Yijun Wang, Dominik Legut, Xiaopeng Liu, Yiyao Li, Chenxi Li, Yiliu Sun, Ruifeng Zhang, Qianfan Zhang
Summary: Magnetic two-dimensional materials show promise in nanoelectronic and spintronic device fabrication. The recent synthesis of the novel two-dimensional material MoSi2N4 has sparked interest in the XA2Z4 series of materials. Doping with 3d magnetic elements results in different magnetic arrangements. By replacing the Mo element with various transition metal elements, researchers identified multiple two-dimensional exchange scenarios and analyzed the significant on-site Coulomb interaction at 3d orbitals, which is closely related to the Mott transition and superexchange interaction.
Article
Quantum Science & Technology
Guodong Bian, Jixing Zhang, Lixia Xu, Pengcheng Fan, Mingxin Li, Chenyu Wu, Jichao Li, Hailong Wang, Qianfan Zhang, Zhongyu Cai, Heng Yuan
Summary: Recent technological advances in the NISQ era have focused on optically addressable color centers in semiconductors, which can achieve spin localization and are the most promising spin qubit candidates for NISQ technologies. The characterized two-level system derived from a naturally separated Bell states in the H-3 center significantly reduces magnetic noise compared to conventional qubits in C-3v systems.
ADVANCED QUANTUM TECHNOLOGIES
(2022)