Article
Materials Science, Multidisciplinary
D. Krychowski, S. Lipinski
Summary: The study discusses spin polarized transport through a quantum dot coupled to ferromagnetic electrodes with noncollinear magnetizations using nonequilibrium Green functions in the finite-U slave boson mean field approximation. The difference in magnetization orientations of the electrodes opens off diagonal spin-orbital transmission and leads to spin-flip currents. The study also explores the impact of spin-orbit coupling, magnetization orientation, and gate voltage on tunneling magnetoresistance (TMR).
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Piotr Busz, Damian Tomaszewski, Jozef Barnas, Jan Martinek
Summary: In this study, we propose a method to observe and utilize the Hanle effect in electronic transport using a spin-polarized scanning tunneling microscope. We demonstrate that the Hanle experiment can be used to observe the precession of a single spin driven by the intrinsic exchange field. Furthermore, we show that the spin relaxation time can be determined from the analysis of the Hanle resonance curve using dc current measurements.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Multidisciplinary Sciences
J. Yoneda, W. Huang, M. Feng, C. H. Yang, K. W. Chan, T. Tanttu, W. Gilbert, R. C. C. Leon, F. E. Hudson, K. M. Itoh, A. Morello, S. D. Bartlett, A. Laucht, A. Saraiva, A. S. Dzurak
Summary: The article demonstrates high-fidelity coherent transport of an electron spin qubit between quantum dots in isotopically-enriched silicon, with a reported polarization transfer fidelity of 99.97% and an average coherent transfer fidelity of 99.4%. The results suggest that this method can reduce the cost of fault-tolerant quantum processors and provide key elements for high-fidelity, on-chip quantum information distribution.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Jinfeng Zheng, Xiao Lian, Mingzai Wu, Fangcai Zheng, Yuanhao Gao, Helin Niu
Summary: In this study, Ni3S4 quantum dots composite graphene/carbon nanotube composites were prepared using a one-step method. The addition of G/CNTs improved electron transport and enhanced the electrochemical performance of the electrode material significantly, increasing specific capacitance and rate capability. The asymmetric supercapacitor assembled with Ni3S4 QDs@G/CNTs electrodes achieved an energy density of 50 Wh kg(-1), showing great potential for improving the electrochemical performance of supercapacitor electrode materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Yang Zhang, Yuning Li, Qing You, Jingye Sun, Ke Li, Hao Hong, Lingbing Kong, Mingqiang Zhu, Tao Deng, Zewen Liu
Summary: In this paper, a 3D photodetector based on a graphene-SWCNT heterojunction is fabricated using a self-rolled-up process. The 3D microcavity structure enhances the optical field and improves the photoresponsivity compared to 2D devices. The photodetector demonstrates broadband photodetection, fast photoresponse speed, excellent sensitivity, mid-infrared detection, and room-temperature imaging capability. This 3D heterojunction photodetector provides a feasible pathway for high-performance graphene-based photodetectors and can be integrated with other light absorptive materials.
Article
Chemistry, Multidisciplinary
Xihan Chen, Haipeng Lu, Kang Wang, Yaxin Zhai, Vladimir Lunin, Peter C. Sercel, Matthew C. Beard
Summary: Metal-halide perovskite semiconductors show potential for opto-spintronic applications by manipulating charge and spin degrees of freedom to reduce power consumption and achieve faster switching times. Tuning excitation density and exciton binding energy can lead to long spin lifetimes in these systems, with different mechanisms dominating at low and high excitation densities.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Computer Science, Interdisciplinary Applications
R. Duda, J. Keski-Rahkonen, J. Solanpaa, E. Rasanen
Summary: TINIE is a state-of-the-art quantum transport simulation framework that can efficiently perform various calculations and has a wide range of applications. It supports calculations ranging from transmission and conductivity to local density of states, and can simulate diverse systems while handling impurities and imperfections.
COMPUTER PHYSICS COMMUNICATIONS
(2022)
Article
Physics, Condensed Matter
S. S. Hoseini, E. Faizabadi
Summary: This project focuses on investigating the electronic and magnetic properties of nanometer-sized phosphorene structures with triangular shapes, examining the relationship between electronic states of phosphorene quantum dots under different conditions and their intrinsic magnetic properties. Both density functional theory calculations and tight-binding calculations reveal mid-gap states in the spectrum of ferromagnetic structures. Oxygen doping is necessary to introduce magnetism to non-spin edges in fully hydrogenated cases.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Review
Chemistry, Inorganic & Nuclear
Huaxin Liu, Xue Zhong, Qing Pan, Yi Zhang, Wentao Deng, Guoqiang Zou, Hongshuai Hou, Xiaobo Ji
Summary: Among the carbon nanomaterials family, fluorescent carbon dots have emerged as significant members with outstanding characteristics and extensive applications. Despite the development of many synthesis strategies, achieving controllable synthesis remains challenging.
COORDINATION CHEMISTRY REVIEWS
(2024)
Article
Chemistry, Analytical
Yun Shu, Yan Wang, Jie Guan, Zhengping Ji, Qin Xu, Xiaoya Hu
Summary: This study proposed a powerful ligand engineering strategy to eliminate surface defects and aggregation of CsPbBr3nanocrystals (NCs), improving their colloidal stability and fluorescence. The as-synthesized NCs with amphiphilic polymer-modified ligands exhibited high photoluminescence intensity and stability. Furthermore, the NCs showed enhanced water, photostability and thermal stability. Additionally, a colorimetric sensor based on these NCs was successfully constructed for the detection of chloride ions in sweat, enabling rapid, visual and accurate detection.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Physical
Ruiting Guo, Lin Li, Baowei Wang, Yinger Xiang, Guoqiang Zou, Yirong Zhu, Hongshuai Hou, Xiaobo Ji
Summary: Carbon dots are a new class of carbon materials with ultrasmall size and unique physicochemical properties, showing great potential in various fields and particularly in the development of next-generation batteries. Studies have demonstrated the advantages of using carbon dots in electrode materials, separator, and electrolyte of advanced batteries, highlighting their importance in guiding the design of future high-performance batteries.
ENERGY STORAGE MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Jianfu Han, Kai Huang, Xuanguang Su, Xiaofei Xiao, Xuemin Gong, Haibin Wang, Juexian Cao
Summary: PbS colloidal quantum dots (CQDs) usually suffer from low carrier mobility due to surface ligand isolation and defects. By combining PbS CQD photodiode with a carbon nanotube (CNT) film field-effect transistor (FET), a transistorized NIR photodetector with high performance and ultrahigh external quantum efficiency (EQE) is achieved.
Article
Materials Science, Multidisciplinary
Tamas Haidekker Galambos, Flavio Ronetti, Bence Hetenyi, Daniel Loss, Jelena Klinovaja
Summary: In this hybrid quantum Hall-superconductor system, nonlocal crossed Andreev reflection can occur due to the distortion effect of the Maxwell equations, resulting in a gap in the spectrum of the edge states. Numerical calculations also reveal the existence of negative resistance and stable zero-energy local density of states, which may be related to the emergence of Majorana bound states.
Article
Materials Science, Multidisciplinary
Jiangchao Han, Xuefeng Chen, Wei Yang, Chen Lv, Xiaoyang Lin, Xinhe Wang, Guodong Wei, Weisheng Zhao
Summary: Spin caloritronics, combining thermoelectric effects and spintronics, has the potential to achieve lower-energy consumption and improved performance in thermal energy conversion devices. Using 1D nanostructures associated with bipolar magnetic semiconductors may solve the issues in 2D materials, leading to distinct spin transport properties in 1T-FeCl2 nanotubes with potential applications in spintronic devices and spin caloritronics devices.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Materials Science, Multidisciplinary
Zhi-Bin Liang, Xu Chen, Xiang-Ji Liao, Jing-Jing Li, Yue Yang, Cai-Feng Wang, You-Xuan Zheng, Su Chen
Summary: In this study, we successfully synthesized stable chiral perovskite nanocrystals (PNCs) with high photoluminescence quantum yields (PL QYs) and circularly polarized luminescence (CPL) using the fiber-spinning chemistry (FSC) method. By modifying the surface defects of PNCs and encapsulating them in PAN nanofibers, the resulting nanofiber films exhibited excellent optical properties and stability.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
