Article
Materials Science, Multidisciplinary
Ying Wang, Jiarong Yao, Shuaishuai Ding, Siyu Guo, Dapeng Cui, Xinyue Wang, Shuyuan Yang, Lijuan Zhang, Xinzi Tian, Di Wu, Chao Jin, Rongjin Li, Wenping Hu
Summary: Research on organic single crystals grown on a liquid substrate and used to construct single-crystalline OSVs revealed high magnetoresistance responses and spin transport properties. A magnetoresistance value as high as 17% was measured with an intermediate layer thickness of 269 nm. Spin transport was observed in single crystals up to a thickness of 457 nm, much larger than that of polycrystalline thin films.
SCIENCE CHINA-MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Wenchao Sun, Lidan Guo, Shunhua Hu, Xiangwei Zhu, Xiaotao Zhang, Wenping Hu, Xiangnan Sun
Summary: Organic semiconductors with long spin relaxation time have attracted wide interest in the field of organic spintronics, but the issue of ill-defined layers at the interface during device fabrication process calls for reliable organic spin valves. Various reliable spin valve preparation methods have been developed to address this challenge.
ORGANIC ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
Huayan Xia, Sangjian Zhang, Hao Li, Tianli Li, Fang Liu, Wenchao Zhang, Wang Guo, Tian Miao, Wenjie Hu, Jian Shen, Yongli Gao, Junliang Yang, Mei Fang
Summary: This study investigates the effects of temperature, bias voltage, and direction of magnetic field on the magnetoresistance (MR) of vertical organic spin valve (OSV) devices, revealing the mechanisms and proposing a domain-switch model to simulate resistance changes. The research provides a new route to tune the MR in organic spintronic devices, which is significant for future functional device applications.
RESULTS IN PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Xitong Liu, Hao Li, Weifeng Zhang, Zhen Yang, Dong Li, Mengya Liu, Kuijuan Jin, Liping Wang, Gui Yu
Summary: Covalent organic frameworks (COFs) have made significant progress in their application to optoelectronic devices such as field-effect transistors, memristors, and photodetectors. This study demonstrates the synthesis of a COF film through acid exfoliation and its successful application in organic spin valves, providing promising prospects for future electronic and spintronic devices.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Chemistry, Physical
Shuaishuai Ding, Yuan Tian, Wenping Hu
Summary: This article summarizes the recent progress in reliable fabrication and evaluation strategies for organic spin valves (OSVs), focusing on challenges such as protecting spin interface properties, optimizing device performance, addressing dead layer issues, and discussing general protocols for reliable evaluation of performance and identification of transport mechanisms. Key fundamentals leading to spurious magnetoresistance response are also highlighted, along with future perspectives on spintronic devices of organic materials.
Article
Materials Science, Multidisciplinary
P. Wang, B. B. Chen, X. Wang
Summary: The study presents a simple and effective method to achieve nonvolatile memory in organic spin valves by doping the organic interlayer, which introduces traps and affects charge and spin transport. The doped organic spin valves exhibit current-voltage hysteresis and reversible resistive switching behavior, indicating successful achievement of nonvolatile memory. The trap-controlled space-charge-limited current model explains the memory effect of the doped devices, while spin diffusion theory based on hyperfine interaction can also explain the corresponding magnetoresistance changes under different resistance states.
Review
Chemistry, Multidisciplinary
Pramod Ghising, Chandan Biswas, Young Hee Lee
Summary: An alternative approach to charge-based electronics is to use the spin degree of freedom for information communication and processing. Graphene, with its long spin-diffusion length at room temperature, shows promise for highly scalable spintronics. The development of graphene spin valves has paved the way for spin devices in graphene, such as spin field-effect transistors and spin majority logic gates. This review examines the progress in graphene spin valves and their role in advancing spin logic devices, discussing different transport mechanisms and comparing the energy efficiency between graphene spin valves and charge-based field-effect transistors.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yanfei Zhu, Lidan Guo, Jun Guo, Luyang Zhao, Chunyan Li, Xueying Qiu, Yang Qin, Xianrong Gu, Xiangnan Sun, Zhiyong Tang
Summary: Quantum-confined atomically precise metal nanoclusters (MNCs) are a new type of inorganic-organic hybrid semiconductor that have been widely used in chemical sensing, optical imaging, biomedicine and catalysis. Researchers have successfully designed and fabricated a spin valve (SV) based on MNCs, demonstrating remarkable magnetoresistance values and the ability to change the spin-dependent transport properties by altering the atomic structure of the MNCs.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Physics, Multidisciplinary
M. Cosset-Cheneau, L. Vila, G. Zahnd, D. Gusakova, V. T. Pham, C. Grezes, X. Waintal, A. Marty, H. Jaffres, J-P Attane
Summary: Experimental evidence of spin absorption orientation dependence in ferromagnetic materials is provided, facilitating the quantification of spin-mixing conductance. The obtained values suggest a limitation by the Sharvin conductance, challenging traditional models based solely on Larmor, transverse decoherence, and spin diffusion lengths.
PHYSICAL REVIEW LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Xueli Yang, Ankang Guo, Lidan Guo, Yunqi Liu, Xiangnan Sun, Yunlong Guo
Summary: This article summarizes the basic operating principle and mechanism of organic spin valves (OSVs) and discusses the importance of accomplishing room-temperature spin transport, FM electrode selection, and spinterface. The state-of-the-art progress of organic semiconductors (OSCs) with room-temperature spin transport in spin valves is reviewed. Furthermore, the effects of carrier mobility and spin relaxation time on the spin diffusion length are systematically analyzed. A feasible perspective for improving the spin transport properties of OSCs is presented.
ACS MATERIALS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Shunhua Hu, Wei Liu, Lidan Guo, Rui Zhang, Xianrong Gu, Ke Meng, Yang Qin, Ankang Guo, Tingting Yang, Cheng Zhang, Xueli Yang, Shuhang Lu, Meng Wu, Kun Lu, Ting Tan, Erjun Zhou, Zhixiang Wei, Xiangnan Sun
Summary: In this study, an innovative spin-filtering-competition mechanism is proposed to continuously modulate the interfacial effect in molecular spin valves at room temperature. By precisely controlling lithium fluoride coverage on the cobalt surface, continuous modulation of the spin-injection process can be successfully achieved, allowing active control of spin polarization of the injected current and magnetoresistance effect.
ADVANCED MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Kun-Rok Jeon, Binoy Krishna Hazra, Jae-Keun Kim, Jae-Chun Jeon, Hyeon Han, Holger L. Meyerheim, Takis Kontos, Audrey Cottet, Stuart S. P. Parkin
Summary: This study reports the spin-triplet supercurrent spin valves in chiral antiferromagnetic Josephson junctions and a direct-current superconducting quantum interference device. By utilizing the Berry curvature-induced fictitious magnetic fields and the non-collinear atomic-scale spin arrangement, long-range triplet Cooper pairing is achieved in the chiral antiferromagnet Mn3Ge. The observed supercurrent spin-valve behaviors under a small magnetic field and the direct-current superconducting quantum interference device functionality are theoretically verified.
NATURE NANOTECHNOLOGY
(2023)
Article
Chemistry, Physical
Junta Igarashi, Wei Zhang, Quentin Remy, Eva Diaz, Jun-Xiao Lin, Julius Hohlfeld, Michel Hehn, Stephane Mangin, Jon Gorchon, Gregory Malinowski
Summary: The authors demonstrate ultrafast magnetization reversal induced by light in rare-earth-free spin valves of [Pt/Co]/Cu/[Co/Pt] within a picosecond. The discovery of spin-transfer torque (STT) allowed the control of magnetization direction in nanoseconds using electrical current. Ultrashort optical pulses have been used to manipulate the magnetization of ferrimagnets in picoseconds by driving the system out of equilibrium. In this study, the authors show ultrafast magnetization reversal induced by light in commonly used [Pt/Co]/Cu/[Co/Pt] spin valves for STT switching, bridging concepts from spintronics and ultrafast magnetism.
Article
Physics, Multidisciplinary
B. Stoddart-Stones, X. Montiel, M. G. Blamire, J. W. A. Robinson
Summary: Superconducting spintronics aims to enhance the performance of spintronics-based devices by utilizing the interaction between magnetic order and superconductivity. In this study, the authors experimentally investigate a superconducting spin valve and observe a crossover from giant magnetoresistance to the superconducting spin-valve effect as the thickness of the material changes.
COMMUNICATIONS PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Timo Bisswanger, Zachary Winter, Anne Schmidt, Frank Volmer, Kenji Watanabe, Takashi Taniguchi, Christoph Stampfer, Bernd Beschoten
Summary: We have developed a new technique to fabricate inverted spin-valve devices, which exhibit improved spin transport properties compared to single-layer graphene spin valves at room temperature.
Article
Chemistry, Multidisciplinary
Aditya Prabaswara, Hyunho Kim, Jung-Wook Min, Ram Chandra Subedi, Dalaver H. Anjum, Bambar Davaasuren, Kalani Moore, Michele Conroy, Somak Mitra, Iman S. Rogan, Tien Khee Ng, Husam N. Alshareef, Boon S. Ooi
Article
Nanoscience & Nanotechnology
Latifah Al-Maghrabi, Chen Huang, Davide Priante, Meng Tian, Jung-Wook Min, Chao Zhao, Huafan Zhang, Ram Chandra Subedi, Hala H. Alhashim, Haiding Sun, Tien Khee Ng, Boon S. Ooi
Article
Chemistry, Physical
Kwangwook Park, Jung-Wook Min, Ram Chandra Subedi, Mohammad Khaled Shakfa, Bambar Davaasuren, Tien Khee Ng, Boon S. Ooi, Chul Kang, Jongmin Kim
APPLIED SURFACE SCIENCE
(2020)
Article
Environmental Sciences
Susann Rossbach, Ram Chandra Subedi, Tien Khee Ng, Boon S. Ooi, Carlos M. Duarte
FRONTIERS IN MARINE SCIENCE
(2020)
Article
Nanoscience & Nanotechnology
Ram Chandra Subedi, Jung-Wook Min, Somak Mitra, Kuang-Hui Li, Idris Ajia, Edgars Stegenburgs, Dalaver H. Anjum, Michele Conroy, Kalani Moore, Ursel Bangert, Iman S. Roqan, Tien Khee Ng, Boon S. Ooi
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Chemistry, Physical
Kwang Jae Lee, Jung-Wook Min, Bekir Turedi, Abdullah Y. Alsalloum, Jung-Hong Min, Yeong Jae Kim, Young Jin Yoo, Semi Oh, Namchul Cho, Ram Chandra Subedi, Somak Mitra, Sang Eun Yoon, Jong H. Kim, Kwangwook Park, Tae-Hoon Chung, Sung Hoon Jung, Jong H. Baek, Young Min Song, Iman S. Roqan, Tien Khee Ng, Boon S. Ooi, Osman M. Bakr
ACS ENERGY LETTERS
(2020)
Article
Materials Science, Multidisciplinary
Ram Chandra Subedi, Susann Rossbach, Chunhong Kang, Omar Alkhazragi, Xiaobin Sun, Jorge A. Holguin-Lerma, Somak Mitra, Iman S. Roqan, Ali R. Behzad, Rachid Sougrat, Tien Khee Ng, Donal D. C. Bradley, Carlos M. Duarte, Boon S. Ooi
Summary: Organisms have evolved the ability to manipulate light for various purposes, including energy capture and protection. Understanding the photophysics of iridocytes in giant clams could lead to advanced optoelectronic materials and devices. These cells show potential for high-speed UV color conversion in UV optical wireless communication applications.
OPTICAL MATERIALS EXPRESS
(2021)
Article
Medicine, General & Internal
Binit Upadhaya Regmi, Ram Chandra Subedi, Sujit Kumar Mandal, Shova Kunwar, Binod Karki
Summary: Esophagitis caused by Herpes Simplex virus is a recognized opportunistic infection in immunocompromised or severely ill hosts, but is uncommon in immunocompetent hosts. It typically responds well to a course of acyclovir. In this case, a young female without other immunocompromised states presented with severe dysphagia, was diagnosed endoscopically and histopathologically, and recovered well after treatment with acyclovir.
OXFORD MEDICAL CASE REPORTS
(2021)
Article
Medicine, General & Internal
Binit U. Regmi, Bishnu D. Pathak, Ram C. Subedi, Bishal Dhakal, Suhail Sapkota, Sushil Joshi, Ujjawal Poudel, Raju Poudel
Summary: We report a case of a 29-year-old immunocompetent female who presented with intermittent headache and vomiting and was ultimately diagnosed with cryptococcal meningitis (CM). Despite atypical neuroimaging findings, CM was confirmed by cryptococcal antigen test. Contrary to the good prognosis reported in literature, the patient died during hospitalization. Therefore, cryptococcosis should be considered as a differential diagnosis, even in immunocompetent individuals presenting with meningitis-like symptoms, to prevent the worst clinical outcome.
OXFORD MEDICAL CASE REPORTS
(2023)
Article
Chemistry, Multidisciplinary
Dhaifallah Almalawi, Sergei Lopatin, Paul R. Edwards, Bin Xin, Ram C. Subedi, Mohammed A. Najmi, Fatimah Alreshidi, Alessandro Genovese, Daisuke Iida, Nimer Wehbe, Boon S. Ooi, Kazuhiro Ohkawa, Robert W. Martin, Iman S. Roqan
Summary: In this study, a catalyst-free single-step growth strategy is explored to grow high-quality self-assembled single-crystal vertical GaN nanowires (NWs) on a wide range of substrates using pulsed laser deposition. The obtained NWs show single-crystalline nature and high optical quality. The growth is initiated by an in situ polycrystalline layer and then transforms into single-crystalline NW nucleation.
Article
Public, Environmental & Occupational Health
Ayush Adhikari, Ram Chandra Subedi, Subi Acharya, Raju Paudel
JOURNAL OF NEPAL MEDICAL ASSOCIATION
(2020)
