Article
Physics, Applied
Can Onur Avci, Charles-Henri Lambert, Giacomo Sala, Pietro Gambardella
Summary: The study focuses on achieving all-electrical write and readout of magnetization through current injection, and demonstrates that replacing a Pt spacer with a Cu spacer can improve the giant magnetoresistance of the device. This type of device provides an alternative route to fabricate a two-terminal spintronic memory.
APPLIED PHYSICS LETTERS
(2021)
Article
Nanoscience & Nanotechnology
Masaaki Imamura, Hironori Asada, Yuya Kano, Ryota Matsuda, Daisuke Tashima, Jiro Kitagawa
Summary: We previously proposed that effective thermal-energy transfer in Bi:YIG LPE films occurs through enhanced SOC, and STE generation in Pt layer is increased by spin pumping from Bi:YIG film. However, we couldn't specifically relate the underlying mechanism to the driving force for spin current generation. In this paper, we discuss the origin of the driving force for increased spin currents through enhanced SOC in LPE YIG films.
Article
Computer Science, Information Systems
Yucai Li, Nan Zhang, Kaiyou Wang
Summary: Spintronic devices based on spin orbit torques offer advantages in low power consumption, high speed, reconfigurability, and high endurance. By designing a local spin current gradient, magnetization can be switched deterministically without external magnetic field. Experimental results demonstrate the feasibility of field-free deterministic current-induced magnetization switching and logic gates based on these devices.
SCIENCE CHINA-INFORMATION SCIENCES
(2022)
Article
Chemistry, Multidisciplinary
Haena Yim, Chansoo Yoon, Ahrom Ryu, So Yeon Yoo, Ju Young Kwon, Gwangtaek Oh, Sohwi Kim, Eun Hee Kee, Keun Hwa Chae, Jung Ho Yoon, Bae Ho Park, Ji-Won Choi
Summary: Vertical two-terminal synaptic devices based on resistive switching have the potential to emulate biological signal processing and implement artificial intelligence learning circuitries. To mimic heterosynaptic behaviors, an additional terminal for neuromodulator activity is required, but adding an extra terminal may lead to low scalability. In this study, a vertical two-terminal Pt/bilayer SANO nanosheet/Nb:STO device emulates heterosynaptic plasticity by controlling trap sites in the SANO nanosheet via modulation of the tunneling current. Similar to biological neuromodulation, the device can modulate synaptic plasticity, pulsed pair facilitation, and cutoff frequency, adding high-level learning to a neuromorphic system with a simple cross-bar array structure.
Article
Chemistry, Multidisciplinary
Xinhou Chen, Hangtian Wang, Haijiang Liu, Chun Wang, Gaoshuai Wei, Chan Fang, Hanchen Wang, Chunyan Geng, Shaojie Liu, Peiyan Li, Haiming Yu, Weisheng Zhao, Jungang Miao, Yutong Li, Li Wang, Tianxiao Nie, Jimin Zhao, Xiaojun Wu
Summary: Developing atomically thin, ultracompact, and ultrafast spintronic devices is crucial for future low-dissipation quantum computation, high-speed storage, and on-chip communication applications. This study successfully realizes optical THz spin-current bursts at room temperature in the 2D van der Waals ferromagnetic Fe3GeTe2 integrated with a topological insulator, providing a foundation for achieving all-optical generation of ultrafast THz spin currents in room-temperature 2D magnetism.
ADVANCED MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Runze Li, Yucai Li, Yu Sheng, Zelalem Abebe Bekele, Kaiyou Wang
Summary: This work demonstrates a multifunctional and nonvolatile spin logic device, showcasing the ability to control switching chirality by adjusting the spin current density gradient, and successfully implementing four typical Boolean logic gates.
ACS APPLIED ELECTRONIC MATERIALS
(2021)
Article
Physics, Applied
E. Fourneau, A. V. Silhanek, N. D. Nguyen
Summary: Research shows that there is a significant error in using the Hanle precession method to evaluate spin diffusion when the distance between the inner and outer electrodes is smaller than 6 times the spin diffusion length. Solutions proposed in the study include adjusting the Hanle fit function and designing four-terminal nonlocal spin valves to accurately determine spin lifetime and spin diffusion coefficient.
PHYSICAL REVIEW APPLIED
(2021)
Article
Chemistry, Multidisciplinary
Baorui Cheng, Yu Zhong, Yuqing Qiu, Suriyanarayanan Vaikuntanathan, Jiwoong Park
Summary: Generating electricity from a salinity gradient, known as osmotic power, has been made possible with the development of ultrathin membranes that have molecule-specific short-range interactions. These membranes have demonstrated giant gateable osmotic power with a record high power density. Molecular dynamics simulations have confirmed that the functionalized nanopores in these membranes are small enough for high selectivity and large enough for fast cross-membrane transport, enabling reversible gateable operation.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Md Anik Hossain, Sara Illescas-Lopez, Rahul Nair, Juan Manuel Cuerva, Luis Alvarez de Cienfuegos, Sandipan Pramanik
Summary: The phenomenon of chirality induced spin selectivity (CISS) has attracted significant attention in recent years, but there are still many aspects that need to be understood. Most of the research has focused on spin polarizations collinear to the charge current, leaving the existence and dependence of transverse spin components and transverse magnetoconductance (MC) largely unknown. The detection of the CISS effect via two-terminal MC experiments is still controversial, with conflicting reports in the literature. Furthermore, the potential influence of electric magnetochiral effects on CISS remains unclear. In this work, the bias dependence of the CISS effect was investigated using planar carbon nanotube networks functionalized with chiral molecules. The study revealed the existence of transverse MC and provided insight into the behavior of CISS in different regimes.
NANOSCALE HORIZONS
(2023)
Article
Multidisciplinary Sciences
E. Rongione, O. Gueckstock, M. Mattern, O. Gomonay, H. Meer, C. Schmitt, R. Ramos, T. Kikkawa, M. Micica, E. Saitoh, J. Sinova, H. Jaffres, J. Mangeney, S. T. B. Goennenwein, S. Gepraegs, T. Kampfrath, M. Klaeui, M. Bargheer, T. S. Seifert, S. Dhillon, R. Lebrun
Summary: This paper demonstrates the generation of both broadband and narrowband terahertz emission in NiO/Pt thin films. The researchers identify two excitation processes, one involving an off-resonant instantaneous optical spin torque and the other involving a strain-wave-induced terahertz torque. These findings contribute to the development of fast opto-spintronic devices based on antiferromagnetic materials.
NATURE COMMUNICATIONS
(2023)
Review
Cell Biology
Nicole M. E. Valle, Mariana P. Nucci, Arielly H. Alves, Luiz D. Rodrigues, Javier B. Mamani, Fernando A. Oliveira, Caique S. Lopes, Alexandre T. Lopes, Marcelo N. P. Carreno, Lionel F. Gamarra
Summary: This systematic review analyzed the development and functionality of microfluidic concentration gradient generators (CGGs) for toxicological evaluation. The majority of articles focused on the fabrication methods, characteristics of the CGGs, biological models, and evaluation techniques. Soft lithography using PDMS material and the Christmas tree CGG design were popular choices. Imaging and microscopy techniques were commonly used for evaluating the toxic effects. CGGs showed advantages over other techniques and were applicable to various biological models.
Article
Chemistry, Multidisciplinary
Youngjun Cho, Taehoon Kim, Gwangmook Kim, Hyung Wan Do, Seung-Rok Kim, Jin-Woo Park, Jae-Min Myoung, Wooyoung Shim
Summary: This study proposes a method that utilizes only two electrodes to determine multiple positions, significantly simplifying the wiring and device fabrication process. By employing two-terminal transparent electrodes, a fully functional 3D touch device is successfully fabricated, introducing a groundbreaking approach to simplify input device architectures.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Hong Yu, Yan Shang, Lei Pei, Guiling Zhang, Hong Yan
Summary: The transport property of a four-terminal MoS2NR/V-7(Bz)(8) device was investigated using density functional theory and NEGF technique. The interaction between the four terminals led to dissimilar currents in different leads, and the promising properties including NDR behavior and spin-polarized lead currents could be fine-tuned by adjusting the source bias or gate bias magnitude, which can be useful in designing multi-terminal nanoelectronic devices.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Hayato Nakayama, Taisuke Horaguchi, Cong He, Hiroaki Sukegawa, Tadakatsu Ohkubo, Seiji Mitani, Kazuto Yamanoi, Yukio Nozaki
Summary: We demonstrate spin-torque generation using a compositional gradient at the interface of titanium and tungsten thin films. By varying the width of the compositional gradient interface (CGI) between films, spin-torque ferromagnetic resonance is observed in a ferromagnetic alloy. The width dependence of the spin torque is associated with the generation of spin and/or orbital angular momentum flow at the CGI.
Article
Physics, Applied
Yiqing Dong, Teng Xu, Wanjun Jiang
Summary: The study demonstrates that spin valve effect driven by current-induced spin-orbit torques can help to achieve electrically controllable and miniaturized two terminal spintronic devices. Spin currents from dual surfaces of the inserted Pt layer can generate spin torques that switch adjacent ferrimagnetic layers, leading to the observation of current-in-plane giant magnetoresistance in a two-terminal device. This research is important for designing miniaturized spintronic devices.
APPLIED PHYSICS LETTERS
(2021)
Article
Optics
M. Iversen, R. E. Barfknecht, A. Foerster, N. T. Zinner
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
(2020)
Article
Physics, Multidisciplinary
Areg Ghazaryan, Mikhail Lemeshko, Artem G. Volosniev
COMMUNICATIONS PHYSICS
(2020)
Article
Physics, Multidisciplinary
Oleksandr Marchukov, Artem G. Volosniev
Summary: In this study, the Gross-Pitaevskii equation is used to investigate acoustic emission generated in a uniform Bose gas by a static impurity, exploring the shape of the sound-wave packet and its potential in extracting impurity properties. The results are general for all one-dimensional systems and can be applied to non-atomic systems, such as analyzing light propagation in nonlinear optical media.
Article
Physics, Multidisciplinary
David Huber, Oleksandr Marchukov, Hans-Werner Hammer, Artem G. Volosniev
Summary: The study shows that the relative motion of three impenetrable particles on a ring is isomorphic to a quantum billiard, which can be classified into integrable and non-integrable states using machine learning tools. The decisive features of the wave functions for classification are normalization and a large number of zero elements, with the network achieving typical accuracies of 97%.
NEW JOURNAL OF PHYSICS
(2021)
Article
Physics, Particles & Fields
Hrachya M. Babujian, Angela Foerster, Michael Karowski
Summary: The high energy behavior of the SU(N) chiral Gross-Neveu model in 1 + 1 dimensions was investigated, showing that the model is integrable and matrix elements of several local operators (form factors) are known. The form factors exhibit rapidity space clustering, indicating factorization when a group of rapidities is shifted to infinity, and explicit factorization formulas are presented for several operators in the SU(N) model.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Multidisciplinary
Daniel S. Grun, Karin Wittmann W., Leandro H. Ymai, Jon Links, Angela Foerster
Summary: The ability to prepare non-classical states reliably is crucial for the realization of quantum technology, and NOON states have emerged as a leading candidate for various applications. This paper demonstrates how to generate NOON states in a model of dipolar bosons and discusses the physical feasibility using ultracold dipolar atoms. The authors propose two protocols, one deterministic and the other probabilistic, for generating arbitrary NOON states in ultra-cold atom systems.
COMMUNICATIONS PHYSICS
(2022)
Article
Physics, Multidisciplinary
D. S. Grlin, L. H. Ymai, K. W. Wittmann, A. P. Tonel, A. Foerster, J. Links
Summary: High sensitivity quantum interferometry requires a deep understanding of quantum correlations, which can be achieved through integrable models. By designing interferometric protocols, the quantum dynamics of the system can be described and its functionality and equivalence can be revealed.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Fluids & Plasmas
Karin Wittmann W, E. R. Castro, Angela Foerster, Lea F. Santos
Summary: The onset of quantum chaos in triple-well potential systems of interacting bosons is investigated. Even in its chaotic regime, the system exhibits features reminiscent of integrability.
Article
Physics, Multidisciplinary
Mikhail Maslov, Mikhail Lemeshko, Artem G. Volosniev
Summary: We study the impact of an impurity with a resonance level on a surrounding Fermi gas. Our findings show that the impurity causes changes in its self-energy and the density of the gas, leading to a model-independent deformation of the Fermi gas density. Additionally, the study investigates the time evolution of the density in quench dynamics and the behavior of the system at finite temperatures.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Artem G. Volosniev, Hen Alpern, Yossi Paltiel, Oded Millo, Mikhail Lemeshko, Areg Ghazaryan
Summary: The study reveals that a one-dimensional quantum model with both friction and spin-orbit coupling can exhibit spin polarization, even with moderate spin-orbit coupling, as long as the friction is strong. These findings help explain the impact of chirality on spin distribution and transport in chiral molecules, and suggest static magnetic properties of chiral molecules that lead to Shiba-like states on a superconductor.
Article
Physics, Multidisciplinary
S. Mistakidis, A. G. Volosniev, P. Schmelcher
PHYSICAL REVIEW RESEARCH
(2020)
Article
Physics, Multidisciplinary
Kelei Tian, Jingsong He, Angela Foerster
ROMANIAN REPORTS IN PHYSICS
(2020)
Article
Materials Science, Multidisciplinary
Ovidiu Patu, Andreas Kluemper, Angela Foerster