Article
Physics, Multidisciplinary
Reena Yadav, Biplab Bhattacharyya, Animesh Pandey, Mandeep Kaur, Anurag Gupta, Sudhir Husale
Summary: This paper investigates the induced superconductivity in Bi2Se3 flakes through electric transport measurements in a hybrid structure composed of Bi2Se3 topological insulator thin flakes and tungsten (W) superconducting electrodes. The resistance of the flakes decreases significantly when the electrodes become superconducting, even when the length of the flakes exceeds the superconducting coherence length. Additionally, the magnetoresistance of the flakes changes from negative to positive above the transition temperature due to the effects of the superconducting electrodes.
Article
Chemistry, Multidisciplinary
Yalin Zhang, Wei-Min Zhao, Chunchen Zhang, Peng Wang, Tong Wang, Shao-Chun Li, Zhongwen Xing, Dingyu Xing
Summary: The abnormal superconducting proximity effect (SPE) in a topological insulator/superconductor heterostructure is revealed, occurring in momentum space regardless of the thickness of the topological insulator film. The unique properties of topologically protected surface states of Bi2Se3 induce the SPE-induced superconductivity even in thick films. This research deepens the understanding of the important role of topologically protected surface states in the SPE.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Shu Hsuan Su, Pei-Yu Chuang, Hsin-Yu Chen, Shih-Chang Weng, Wei-Chuan Chen, Ku-Ding Tsuei, Chao-Kuei Lee, Shih-Hsun Yu, Mitch M-C Chou, Li-Wei Tu, Horng-Tay Jeng, Chien-Ming Tu, Chih-Wei Luo, Cheng-Maw Cheng, Tay-Rong Chang, Jung-Chun Andrew Huang
Summary: The study demonstrates the topological proximity effect between antimonene and Sb2Te3, indicating the 2D material antimonene possesses a 2D topological state and forms Dirac fermions at the interface of a 2D normal insulator and a 3D topological insulator. By hydrogen etching Sb2Te3, the position of the Dirac point and shape of the Dirac surface state can be tuned, providing a new approach to create QSH systems in 2D-material TI heterostructures.
Article
Nanoscience & Nanotechnology
Faizan Ahmad, Rachana Kumar, Sunil Singh Kushvaha, Mahesh Kumar, Pramod Kumar
Summary: This study analyzed the n-GaN/p-Bi2Se3 topological heterojunction using Raman spectroscopy and ultrafast transient absorption spectroscopy, exploring the surface states, energy levels, charge transfer, and carrier relaxation processes. Electrical measurements were also conducted to investigate the influence of interface states on the electrical and optical performance.
NPJ 2D MATERIALS AND APPLICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Jingjing Chen, Wenzheng Xu, Zhenbing Tan, Zhencun Pan, Pengfei Zhu, Zhi-Min Liao, Dapeng Yu
Summary: This study investigates the transport properties of a MnBi2Te4-NbN hybrid device and suggests the existence of zero-energy bound states and a topological phase transition in this system. The hybrid structure can serve as a platform for creating Majorana fermions, which holds significant scientific importance.
Article
Multidisciplinary Sciences
Masataka Mogi, Kenji Yasuda, Reika Fujimura, Ryutaro Yoshimi, Naoki Ogawa, Atsushi Tsukazaki, Minoru Kawamura, Kei S. Takahashi, Masashi Kawasaki, Yoshinori Tokura
Summary: Efficient current-induced switching of surface ferromagnetism in hetero-bilayers of topological insulator (Bi1-xSbx)(2)Te-3 and ferromagnetic insulator Cr2Ge2Te6 demonstrates the potential for electrical control of dissipationless topological-current circuits, showing efficient charge-to-spin current conversion and large anomalous Hall effect.
NATURE COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Na Li, Yun-bin Sun, Rui Sun, Xu Yang, Wei Zhang, Zong-kai Xie, Jia-nan Liu, Yan Li, Yang Li, Zi-zhao Gong, Xiang-qun Zhang, Wei He, Zhao-hua Cheng
Summary: Topological insulators with distinct topological surface states have been widely investigated for spintronics and quantum information devices. This study reveals that the topological surface states can significantly accelerate ultrafast demagnetization and enhance the damping factor of heterostructures. These findings have implications for future topological spintronic devices or quantum information processing.
Article
Quantum Science & Technology
Won-Young Choi, Jae Ho Jeon, Hyun-Woo Bang, Woosuk Yoo, Sahng-Kyoon Jerng, Seung-Hyun Chun, Sunghun Lee, Myung-Hwa Jung
Summary: The proximity effect between magnetic materials and topological surface states enhances the localized spins, persisting up to temperatures above 300 K. Observing the increased charge carrier density and decreased carrier mobility near the Curie temperature in the MnSi/Bi2Se3 bilayer further supports this effect. This finding provides a new platform for future spintronic devices by incorporating materials with distinct topological phases.
ADVANCED QUANTUM TECHNOLOGIES
(2021)
Article
Multidisciplinary Sciences
Myoung-Woo Yoo, J. Tornos, A. Sander, Ling-Fang Lin, Narayan Mohanta, A. Peralta, D. Sanchez-Manzano, F. Gallego, D. Haskel, J. W. Freeland, D. J. Keavney, Y. Choi, J. Strempfer, X. Wang, M. Cabero, Hari Babu Vasili, Manuel Valvidares, G. Sanchez-Santolino, J. M. Gonzalez-Calbet, A. Rivera, C. Leon, S. Rosenkranz, M. Bibes, A. Barthelemy, A. Anane, Elbio Dagotto, S. Okamoto, S. G. E. te Velthuis, J. Santamaria, Javier E. Villegas
Summary: The anomalous Hall effect (AHE) in ferromagnets can be caused by intrinsic and extrinsic mechanisms. The interplay between correlated physics and topological phenomena at the interface between a ferromagnet La0.7Sr0.3MnO3 and a semimetallic SrIrO3 results in a large AHE with high anomalous Hall conductivity and Hall angle values.
NATURE COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Wen-Zheng Xu, Chun-Guang Chu, Zhen-Cun Pan, Jing-Jing Chen, An-Qi Wang, Zhen-Bing Tan, Peng-Fei Zhu, Xing-Guo Ye, Da-Peng Yu, Zhi-Min Liao
Summary: We report magnetotransport measurements in the NbN-magnetic topological insulator MnBi2Te4 (MBT)-NbN junction at low temperature. A tunneling behavior and a transition from negative to positive magnetoresistance were observed. The proximity-induced superconducting gap was estimated to be around 0.1 meV based on the differential resistance dips.
Article
Computer Science, Information Systems
Hangtian Wang, Koichi Murata, Weiran Xie, Jing Li, Jie Zhang, Kang L. Wang, Weisheng Zhao, Tianxiao Nie
Summary: Introducing magnetic order into topological insulator can achieve topological magnetism at high temperatures. The proximity effect is an important method that can advance the practical application of topological magnetism.
SCIENCE CHINA-INFORMATION SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
Sukanta Nandi, Shany Cohen, Danveer Singh, Michal Poplinger, Pilkhaz Nanikashvili, Doron Naveh, Tomer Lewi
Summary: This study investigates the mid-infrared (MIR) properties of chemical vapor deposition-grown Bi2Se3 nanobeams using a combination of far-field and near-field nanoscale imaging and spectroscopy. The results reveal the high refractive index values of Bi2Se3 and demonstrate its Mie resonances in the MIR. The study also provides experimental evidence for the potential applications of Bi2Se3 in quantum circuitry, nonlinear generation, high-Q metaphotonics, and photodetection.
Article
Physics, Multidisciplinary
Yuxin Liu, Xuefan Niu, Rencong Zhang, Qinghua Zhang, Jing Teng, Yongqing Li
Summary: An experimental study of electron transport properties of MnSe/(Bi,Sb)(2)Te-3 heterostructures was conducted, showing a strong magnetic proximity effect on the Hall effect and longitudinal resistances. The gate voltage was found to significantly modify the anomalous Hall conductance, indicating that heterostructures based on antiferromagnetic insulators provide a promising platform for investigating a wide range of topological spintronic phenomena.
CHINESE PHYSICS LETTERS
(2021)
Article
Materials Science, Multidisciplinary
T. H. Kokkeler, A. A. Golubov, F. S. Bergeret
Summary: We study the transport properties of a diffusive Josephson junction between superconductors and ferromagnetic insulators on a three-dimensional topological insulator. We analyze the Usadel equation and find the appearance of an anomalous phase in the absence of an external magnetic field. We also explore nonreciprocal electronic transport and calculate the diode efficiency of the junction, showing a significant effect even without an applied magnetic field and a nonmonotonic behavior with temperature.
Article
Chemistry, Multidisciplinary
Wenbo Wang, Yi-Fan Zhao, Fei Wang, Matthew W. Daniels, Cui-Zu Chang, Jiadong Zang, Di Xiao, Weida Wu
Summary: In this study, evidence of an emergent topological Hall effect from chiral bubbles in a two-dimensional ferromagnet was reported. The sign of the THE signal is determined by the net curvature of domain walls in different configurations, and the strength of the signal is correlated with the density of nucleation or pinned bubble domains. The findings not only reveal a general mechanism of THE in two-dimensional ferromagnets but also open up possibilities for the manipulation of topological spin textures for spintronic applications.
Article
Chemistry, Multidisciplinary
Joost Ridderbos, Matthias Brauns, Folkert K. de Vries, Jie Shen, Ang Li, Sebastian Kolling, Marcel A. Verheijen, Alexander Brinkman, Wilfred G. van der Wiel, Erik P. A. M. Bakkers, Floris A. Zwanenburg
Article
Nanoscience & Nanotechnology
Bingchen Wang, Jun Chen, Cliff Kowall, Lei Li
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Chemistry, Multidisciplinary
Ruobing Bai, Yanhao Du, Anqin Xu, Yang Hu, John R. Erickson, Liwei Hui, Jun Chen, Feng Xiong, Haitao Liu
Summary: The development of novel doping strategies using DNA as both the template and dopant carrier for nanoscale site-specific doping of Si wafer shows potential for high-resolution patterning and low-cost large-scale manufacturing. Experimental results demonstrate that this approach can achieve both n-type and p-type site-specific doping of Si, showing that the DNA template can pattern Si and deliver dopants effectively.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Analytical
Rachael E. Wilson, Andrea Jaquins-Gerstl, Jun Chen, Michael Rerick, Stephen G. Weber
ANALYTICAL CHEMISTRY
(2020)
Article
Chemistry, Multidisciplinary
Dustin Schrecongost, Yinxiao Xiang, Jun Chen, Cuifeng Ying, Hai-Tian Zhang, Ming Yang, Prakash Gajurel, Weitao Dai, Roman Engel-Herbert, Cheng Cen
Article
Materials Science, Multidisciplinary
Mengmeng Bai, Fan Yang, Martina Luysberg, Junya Feng, Andrea Bliesener, Gertjan Lippertz, A. A. Taskin, Joachim Mayer, Yoichi Ando
PHYSICAL REVIEW MATERIALS
(2020)
Article
Physics, Applied
Dengyu Yang, Shan Hao, Jun Chen, Qing Guo, Muqing Yu, Yang Hu, Kitae Eom, Jung-Woo Lee, Chang-Beom Eom, Patrick Irvin, Jeremy Levy
APPLIED PHYSICS LETTERS
(2020)
Article
Physics, Multidisciplinary
P. Yu, J. Chen, M. Gomanko, G. Badawy, E. P. A. M. Bakkers, K. Zuo, V Mourik, S. M. Frolov
Summary: This study reports the observation of nearly quantized peaks close to the expected value by tunnel probes on both ends of a nanowire. However, the nearly quantized zero-bias peaks were only found localized to one end of the nanowire, raising doubts on whether they are Majoranas.
Article
Materials Science, Biomaterials
Liwei Hui, Jun Chen, Parmila Kafley, Haitao Liu
Summary: This paper presents a novel antibacterial chip that can selectively capture and kill bacteria with high selectivity and efficacy using low-voltage DC electricity. The chip contains integrated electrodes that can effectively eliminate captured bacteria within a short period of time, and can be easily regenerated. Additionally, the chip exhibits good biocompatibility and inhibits adhesion of human blood cells, offering a potential new strategy for addressing pathogenic bacterial contamination and infection.
ACS BIOMATERIALS SCIENCE & ENGINEERING
(2021)
Article
Crystallography
Peng Zhu, Yongkai Li, Xiaohui Yang, Ying Yang, Xin Zhang, Xiao Lin, Fan Yang, Xiang Li, Zhiwei Wang
Summary: In this study, a new crystal growth technique called the liquid transport method was used to successfully synthesize single crystals of a topological superconductor candidate, InxSn1-xTe (IST), with relatively large sizes. The results showed that lattice parameters decreased monotonously with the increase of indium content, while hole density varied in reverse; superconductivity with a critical temperature around 1.6 K was observed, and the hole densities were estimated to be in the order of 10^(20) cm^(-3).
Article
Chemistry, Physical
Kaveh Barri, Pengcheng Jiao, Qianyun Zhang, Jun Chen, Zhong Lin Wang, Amir H. Alavi
Summary: Researchers have introduced a novel concept called self-aware composite mechanical metamaterial (SCMM) that can transform mechanical metamaterials into nanogenerators and active sensing mediums. By studying new paradigms, they have achieved contact electrification between snapping microstructures composed of topologically different triboelectric materials, leading to self-powering and self-sensing meta-tribomaterial systems.
Article
Optics
Yi Liang, Samaneh Pakniyat, Yinxiao Xiang, Jun Chen, Fan Shi, George W. Hanson, Cheng Cen
Summary: The experimental demonstration of interfacial modes at terahertz frequencies confirms theoretical predictions and shows the potential for flexibly tuning the directionality of unidirectional surface plasmon polaritons.
Article
Crystallography
Xiaodong Li, Yang Yang, Xiaocui Wang, Peng Zhu, Fanming Qu, Zhiwei Wang, Fan Yang
Summary: This article presents a study on the weak antilocalization (WAL) effect in polycrystalline SnTe films deposited by magnetron sputtering. The results show that clean WAL signals can be obtained at low temperatures, with an increase in transport channels contributing to WAL and a change in the temperature dependence of phase coherence length. The findings provide insights into the quantum transport properties of SnTe.
Article
Chemistry, Multidisciplinary
Marco Rossi, Ghada Badawy, Zhi-Yuan Zhang, Guang Yang, Guo-An Li, Jia-Yu Shi, Roy L. M. Op Het Veld, Sasa Gazibegovic, Lu Li, Jie Shen, Marcel A. Verheijen, Erik P. A. M. Bakkers
Summary: This paper presents a method for synthesizing free-standing InSb nanostructures on mismatched substrates and investigates their properties. The morphology of the nanostructures depends on the relative arrangement of two nanowires, with type I and type II nanostructures exhibiting promising transport properties for quantum devices. This platform can be used to selectively deposit superconductors and fabricate InSb-superconductor hybrid devices.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
J. Shen, G. W. Winkler, F. Borsoi, S. Heedt, V Levajac, J-Y Wang, D. van Driel, D. Bouman, S. Gazibegovic, R. L. M. Op Het Veld, D. Car, J. A. Logan, M. Pendharkar, C. J. Palmstrom, E. P. A. M. Bakkers, L. P. Kouwenhoven, B. van Heck
Summary: The study reveals that under specific conditions, the charge periodicity of a hybrid InSb-Al island changes from 2e to 1e, with correlated oscillations of peak spacings and heights observed in certain gate voltage regions.
