Article
Engineering, Electrical & Electronic
Neha Jha, Anand Pariyar, Tahereh Sadat Parvini, Christian Denker, Pavan K. Vardhanapu, Gonela Vijaykumar, Arne Ahrens, Tobias Meyer, Michael Seibt, Nicolae Atodiresei, Jagadeesh S. Moodera, Swadhin K. Mandal, Markus Muenzenberg
Summary: Delocalized carbon-based radical species with unpaired spin have been used to fabricate Cu-PLY- and ZnPLY-based organic magnetic tunnel junctions. These junctions show nonlinear and weakly temperature-dependent current-voltage characteristics, indicating tunneling as the dominant transport mechanism. Cu-PLY-based OMTJs exhibit significant magnetoresistance due to the formation of hybrid states at the metal-molecule interfaces called spinterface, and also show stable voltage-driven resistive switching.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Alejandro Schulman, Elvira Paz, Tim Bohnert, Alex Steven Jenkins, Ricardo Ferreira
Summary: Magnetic tunnel junctions (MTJs) and memristors are emerging nanotechnologies that have attracted significant attention for their potential applications in sensing, data storage, and computation. This study demonstrates the co-existence of magnetoresistance and memristive properties on MTJs, showing potential for multifunctional devices. Furthermore, doping the oxide barrier lowers the power consumption of the memristive behavior, enhancing the scalability potential. These findings pave the way for integrating memristors and spintronic devices in complex reprogrammable circuits.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Christopher Safranski, Guohan Hu, Jonathan Z. Sun, Pouya Hashemi, Stephen L. Brown, Luxherta Buzi, Christopher P. D'Emic, Eric R. J. Edwards, Eileen Galligan, Matthias G. Gottwald, Oki Gunawan, Saba Karimeddiny, Hyunsung Jung, Juhyun Kim, Ken Latzko, Philip L. Trouilloud, Daniel C. Worledge
Summary: In this study, reliable sub-nanosecond switching in two-terminal spin transfer torque MRAM devices were achieved using double spin-magnetic tunnel junctions. The experimental results demonstrated excellent performance of the devices under different temperature and write pulse conditions, and a significant reduction in switching current density and power consumption compared to the state-of-the-art three-terminal spin-orbit torque MRAM devices with similar energy barriers.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2022)
Article
Multidisciplinary Sciences
Suyogya Karki, Vivian Rogers, Priyamvada Jadaun, Daniel S. Marshall, Jean Anne C. Incorvia
Summary: The study suggests that scandium nitride could be a potential barrier material for spintronic devices, as it shows high magnetoresistance compared to magnesium oxide.
ADVANCED THEORY AND SIMULATIONS
(2021)
Review
Quantum Science & Technology
Pascal Martin, Bruno Dlubak, Pierre Seneor, Richard Mattana, Marie-Blandine Martin, Philippe Lafarge, Francois Mallet, Maria Luisa Della Rocca, Simon M-M Dubois, Jean-Christophe Charlier, Clement Barraud
Summary: Spintronics is a quantum technology that incorporates the spin quantum degree into conventional CMOS electronics. Since the discovery of giant magneto-resistance in 1988, spintronics has been widely used in everyday applications, and also shows promising post-CMOS prospects. Carbon nanostructures, such as molecules, graphene, and carbon nanotubes, are among the most sought-after materials in this field.
ADVANCED QUANTUM TECHNOLOGIES
(2022)
Article
Nanoscience & Nanotechnology
Trevor P. Almeida, Alvaro Palomino, Steven Lequeux, Victor Boureau, Olivier Fruchart, Ioan Lucian Prejbeanu, Bernard Dieny, David Cooper
Summary: This paper reviews recent work on perpendicular shape anisotropy and double magnetic tunnel junctions using advanced electron microscopy techniques, with a focus on the 3D and nanoscale nature of these structures. By directly imaging the magnetic configurations using off-axis electron holography and improving phase sensitivity, subtle variations and thermal stability can be observed. The experimental feasibility, advantages, and limitations of using electron holography for analyzing MRAM devices are discussed.
Review
Physics, Applied
Ehsan Elahi, Ghulam Dastgeer, Pradeep Raj Sharma, Sobia Nisar, Muhammad Suleman, Muhammad Waqas Iqbal, Muhammad Imran, Muhammad Aslam, Ali Imran
Summary: This article reviews the progress of vertical magnetic tunnel junctions (MTJs) based on 2D materials in spin transport, analyzes the relationship between spin transportation characteristics and factors such as magnetic field and temperature, discusses the application of 2D ferromagnets in van der Waals junctions, and explores the challenges and prospects of improving spintronic devices.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Li-Chung Yu, Yu-Ling Lai, Ming-Wei Lin, Hung-Wei Shiu, Jiu-Hua Lin, Der-Hsin Wei, Hong-Ji Lin, Yao-Jane Hsu
Summary: Tailoring the organic-inorganic heterostructure through nanotechnology and molecular engineering is a promising route to achieve high performances of spintronics. By manipulating the magnetic exchange coupling of a hybrid organic-ferromagnetic complex through coevaporation, paramagnetic nanoclusters with varied volume ratios of Alq(3) to Co were fabricated. The extent of hybridization strongly correlates with the coercivity and magnetic moment of the paramagnetic thin films, showcasing efficient spin filtering for molecular/organic spintronics.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Xueying Zhang, Wenlong Cai, Mengxing Wang, Biao Pan, Kaihua Cao, Maosen Guo, Tianrui Zhang, Houyi Cheng, Shaoxin Li, Daoqian Zhu, Lin Wang, Fazhan Shi, Jiangfeng Du, Weisheng Zhao
Summary: Spin-torque memristors offer fast, low-power, and infinite memristive behavior for neuromorphic computing and non-volatile memory applications. However, the physical implementation faces challenges in combining high magnetoresistance, stable domain wall pinning, and current-induced switching. Researchers have experimentally demonstrated a nanoscale spin-torque memristor with a unique composite free layer structure, achieving high tunneling magnetoresistance and memristive behavior through spin-transfer torque switching.
Article
Nanoscience & Nanotechnology
Thomas Leonard, Samuel Liu, Mahshid Alamdar, Harrison Jin, Can Cui, Otitoaleke G. Akinola, Lin Xue, T. Patrick Xiao, Joseph S. Friedman, Matthew J. Marinella, Christopher H. Bennett, Jean Anne C. Incorvia
Summary: This study explores artificial synapses based on magnetic materials that use a magnetic tunnel junction (MTJ) and a magnetic domain wall (DW) to achieve a multi-weight conductance state. Different geometries are investigated to achieve stable resistance levels and high controllability of weight updates. The work shows that MW magnetic synapses are a feasible technology for neuromorphic computing and provides design guidelines for emerging artificial synapse technologies.
ADVANCED ELECTRONIC MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Ruttapol Malatong, Takuro Sato, Jakkapan Kumsampao, Taketoshi Minato, Masayuki Suda, Vinich Promarak, Hiroshi M. Yamamoto
Summary: This study addresses the challenges of spin controllability, durability, and spin-polarization efficiency in chiral-induced spin selectivity (CISS) by developing a self-assembled monolayer (SAM) of overcrowded alkene (OCA)-based molecular motor. It is demonstrated that the direction of spin polarization can be externally and repeatedly manipulated by switching the molecular chirality, and a higher stereo-ordering architecture of the SAM of OCAs enhances the efficiency of spin polarization. These findings provide a credible feasibility study for the development of CISS-based spintronic devices.
Article
Physics, Applied
Esita Pandey, Brindaban Ojha, Subhankar Bedanta
Summary: The strength of the interfacial Dzyaloshinskii-Moriya interaction (iDMI) and the dynamics of domain walls (DWs) were investigated in a Pd/Co/C60/Pd system. The iDMI was found to increase from -0.07 to -0.46 mJ/m2 with increasing C60 thickness, transforming an achiral Bloch wall into a chiral Neel wall. This is significant for the use of carbon-based materials in chiral-DW-based device applications.
PHYSICAL REVIEW APPLIED
(2023)
Article
Chemistry, Multidisciplinary
Gyu Don Kong, Hyunsun Song, Seungmin Yoon, Hungu Kang, Rakwoo Chang, Hyo Jae Yoon
Summary: Interstitially mixed self-assembled monolayers (imSAMs) remarkably enhance the electrical stability of molecular-scale electronic devices without deteriorating function and reliability. This is achieved through the new approach of repeated surface exchange of molecules (ReSEM), filling the interstices between matrix molecules with reinforcement molecules to significantly enhance breakdown voltage.
Article
Physics, Applied
B. Quinard, F. Godel, M. Galbiati, V Zatko, A. Sander, A. Vecchiola, S. Collin, K. Bouzehouane, F. Petroff, R. Mattana, M-B Martin, B. Dlubak, P. Seneor
Summary: By using atomic layer deposition (ALD), a ferromagnetic cobalt electrode was successfully grown and demonstrated as a functional spin source. The research shows that the ALD-grown cobalt layer has metallic properties and ferromagnetism, with high surface flatness and uniform conductivity, suitable for spintronics applications.
APPLIED PHYSICS LETTERS
(2022)
Article
Electrochemistry
Jie Shi, Feng Jiang, Shichuan Long, Zhixing Lu, Tianshuo Liu, Haining Zheng, Jia Shi, Yang Yang, Wenjing Hong, Zhong-Qun Tian
Summary: Eutectic Gallium-Indium (EGaIn) is a promising technique for fabricating self-assembled monolayers (SAMs)-based molecular devices, but previous measurements revealed abnormal signals, such as offset zero-bias current. A new automatic instrument platform was built to systematically study the electrical behavior of SAMs, showing that ambient water affects charge transport through molecular junctions and can cause offset of zero-bias current.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Multidisciplinary
Belen Lerma-Berlanga, Carolina R. Ganivet, Neyvis Almora-Barrios, Sergio Tatay, Yong Peng, Josep Albero, Oscar Fabelo, Javier Gonzalez-Platas, Hermenegildo Garcia, Natalia M. Padial, Carlos Marti-Gastaldo
Summary: Metal-Organic Frameworks are used as crystalline matrices to synthesize multiple component or multivariate solids, allowing for property customization. By optimizing synthesis through high-throughput methods, it is possible to create multivariate frameworks with efficient light sensitization, chemical stability, and porosity for photocatalysis applications. Solvent-assisted linker exchange reactions can control the distribution of linkers in crystals, affecting their performance in photocatalytic activities.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Jacko Rastikian, Stephan Suffit, Clement Barraud, Amandine Bellec, Vincent Repain, Yves Roussigne, Mohamed Belmeguenai, Samir Farhat, Ludovic Le Laurent, Cyrille Barreteau, Salim Mourad Cherif
Summary: The magnetism of a cobalt ultrathin film deposited on different two-dimensional (2D) materials was studied using the Brillouin light scattering technique. The results showed enhanced perpendicular magnetic anisotropy in the Co/2D systems compared to the reference layer (Co/SiO2), along with an increase in magnetic damping and a small Dzyaloshinskii-Moriya interaction in the samples. These findings were discussed in comparison with ab initio calculations and recent literature.
PHYSICAL REVIEW MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Elena Lopez-Maya, Natalia M. Padial, Javier Castells-Gil, Carolina R. Ganivet, Ana Rubio-Gaspar, Francisco G. Cirujano, Neyvis Almora-Barrios, Sergio Tatay, Sergio Navalon, Carlos Marti-Gastaldo
Summary: The study demonstrates how the different affinity of metal sites can be utilized for selective grafting of molecules, allowing for cooperative reactions between Lewis acid titanium centers and available -NH sites in the framework. This approach provides a method for controlling the positioning and distribution of chemical functions in precise locations for cooperative reactions of epoxides and CO2.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Nanoscience & Nanotechnology
Pierre Brus, Victor Zatko, Marta Galbiati, Florian Godel, Sophie Collin, Bernard Servet, Stephane Xavier, Raphael Aubry, Patrick Garabedian, Marie-Blandine Martin, Bruno Dlubak, Pierre Seneor, Odile Bezencenet
Summary: This study evaluated a large-scale manufacturing/passivation process for large area monolayers of MoS₂ and achieved a series of results beneficial for the application of 2D TMDCs in RF devices.
ADVANCED ELECTRONIC MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Victor Zatko, Simon Mutien-Marie Dubois, Florian Godel, Cecile Carretero, Anke Sander, Sophie Collin, Marta Galbiati, Julian Peiro, Federico Panciera, Gilles Patriarche, Pierre Brus, Bernard Servet, Jean-Christophe Charlier, Marie-Blandine Martin, Bruno Dlubak, Pierre Seneor
Summary: This study presents a growth process utilizing pulsed laser deposition to create large-scale complex van der Waals heterostructures at a high temperature, demonstrating the successful construction of multilayer stacks in a single run with high homogeneity. The structural preservation achieved through continuous in situ growth allows even the most fragile 2D layers to remain intact when encapsulated in van der Waals heterostructures.
Correction
Chemistry, Multidisciplinary
Ramon Torres-Cavanillas, Garin Escorcia-Ariza, Isaac Brotons-Alcazar, Roger Sanchis-Gual, Prakash Chandra Mondal, Lorena E. Rosaleny, Silvia Gimenez-Santamarina, Michele Sessolo, Marta Galbiati, Sergio Tatay, Alejandro Gaita-Arino, Alicia Forment-Aliaga, Salvador Cardona-Serra
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Physics, Applied
B. Quinard, F. Godel, M. Galbiati, V Zatko, A. Sander, A. Vecchiola, S. Collin, K. Bouzehouane, F. Petroff, R. Mattana, M-B Martin, B. Dlubak, P. Seneor
Summary: By using atomic layer deposition (ALD), a ferromagnetic cobalt electrode was successfully grown and demonstrated as a functional spin source. The research shows that the ALD-grown cobalt layer has metallic properties and ferromagnetism, with high surface flatness and uniform conductivity, suitable for spintronics applications.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Belen Lerma-Berlanga, Carolina R. Ganivet, Neyvis Almora-Barrios, Rebecca Vismara, Jorge A. R. Navarro, Sergio Tatay, Natalia M. Padial, Carlos Marti-Gastaldo
Summary: The value of covalent post-synthetic modification in expanding the chemistry and pore versatility of reticular solids is well documented. In this study, tetrazine connectors were used to demonstrate the value of all-purpose inverse electron-demand Diels-Alder ligation chemistry, generating multiple pore environments with diverse chemical functionalities and accessible porosities.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Victor Zatko, Simon M. -M. Dubois, Florian Godel, Marta Galbiati, Julian Peiro, Anke Sander, Cecile Carretero, Aymeric Vecchiola, Sophie Collin, Karim Bouzehouane, Bernard Servet, Frederic Petroff, Jean-Christophe Charlier, Marie-Blandine Martin, Bruno Dlubak, Pierre Seneor
Summary: This study reports on the significant spin-filtering effects in epitaxial graphene-based spin valves, particularly enhanced in the case of multilayer graphene. The combination of chemical vapor deposited multilayer graphene with high-quality epitaxial Ni(111) ferromagnetic spin source led to the obtained results. Complete nanometric spin valve junctions were fabricated using a local probe indentation process, and spin properties were extracted from the graphene-protected ferromagnetic electrode using a reference Al2O3/Co spin analyzer. The study discusses the emerging physical picture of graphene-ferromagnet systems and provides insight into the efficient spin filtering effects and the interfacial matching of the graphene layers with the spin-polarized Ni surface, showcasing the potential of low Resistance-Area (RA) graphene interfaces in spin-based devices.
Article
Chemistry, Multidisciplinary
Ana Rubio-Gaspar, Sergio Navalon, Sergio Tatay, Francisco G. Cirujano, Carmen Fernandez-Conde, Natalia M. Padial, Carlos Marti-Gastaldo
Summary: Compared to indirectly modifying the framework, synthetic control of cluster composition allows direct access to catalytic activities without specific metal combinations. In this study, the aminolysis reaction of epoxides was tested using isostructural mesoporous frameworks with five combinations of homometallic and heterobimetallic metal-oxo trimers (Fe3, Ti3, TiFe2, TiCo2, and TiNi2). Only the TiFe2 nodes displayed activities comparable to benchmark catalysts based on grafting of strong acids, which arise from the combination of Lewis Ti4+ and Bronsted Fe3+-OH acid sites. The applicability of MUV-101(Fe) in the synthesis of beta-amino alcohols was demonstrated, including the gram-scale synthesis of propranolol, a natural beta-blocker listed as an essential medicine by the World Health Organization, with excellent yield and selectivity.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Victor Zatko, Regina Galceran, Marta Galbiati, Julian Peiro, Florian Godel, Lisa-Marie Kern, David Perconte, Fatima Ibrahim, Ali Hallal, Mairbek Chshiev, Benjamin Martinez, Carlos Frontera, Lluis Balcells, Piran R. Kidambi, John Robertson, Stephan Hofmann, Sophie Collin, Frederic Petroff, Marie-Blandine Martin, Bruno Dlubak, Pierre Seneor
Summary: 2D materials can be manipulated by proximity effects to modify their electronic structure, allowing for the creation of unique properties in interfaces and heterostructures. In this study, we investigate the possibility of using a ferromagnetic insulator-graphene electrode to design a magnetic tunnel junction. Through the observation of tunnel magnetoresistance, we confirm the emergence of spin polarization in proximitized graphene layers, which is induced by a spin-dependent splitting of the Dirac band structure. This opens up opportunities for utilizing 2D quantum materials in spintronics applications, such as memory cells and logic circuits.
Article
Chemistry, Multidisciplinary
Belen Lerma-Berlanga, Natalia M. Padial, Marta Galbiati, Isaac Brotons-Alcazar, Josep Albero, Hermenegildo Garcia, Alicia Forment-Aliaga, Carolina R. Ganivet, Carlos Marti-Gastaldo
Summary: The presence of tetrazine units in the organic nodes of UiO-68-TZCD controls the formation of ultrathin coatings of single-wall nanotubes that decorate the surface of the crystal. These crystal hybrids can be prepared straightforwardly in one step and exhibit exceptional stability in water, high surface areas, and good conductivity even at low carbon weight contents.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Physics, Multidisciplinary
Marta Galbiati, Fernando Ramiro-Manzano, Jose Joaquin Perez Grau, Fernando Cantos-Prieto, Jaume Meseguer-Sanchez, Ivona Kosic, Filippo Mione, Ana Pallares Vilar, Andres Cantarero, David Soriano, Efren Navarro-Moratalla
Summary: By using hyperspectral wide-field imaging, researchers revealed a nonmonotonic thickness dependence of the optical properties in magnetic 2D material CrI3. This finding sheds light on the structural conundrum and offers insights into mesoscopic effects in layered materials and light-matter interactions in magnetic 2D materials.
PHYSICAL REVIEW LETTERS
(2023)
Article
Physics, Multidisciplinary
Mathieu Lizee, Alice Marcotte, Baptiste Coquinot, Nikita Kavokine, Karen Sobnath, Clement Barraud, Ankit Bhardwaj, Boya Radha, Antoine Nigues, Lyderic Bocquet, Alessandro Siria
Summary: Solid-liquid interfaces exhibit emerging phenomena at nanometer scales, which are crucial for their technological applications. However, the coupling between liquid flows and the solid's electronic degrees of freedom has been largely overlooked. In this study, we investigate the molecular mechanisms of interfacial liquid-electron coupling and reveal flow-induced current generation at the nanoscale. Our findings demonstrate a momentum transfer mechanism between fluid molecules and graphene charge carriers, mediated by the solid's phonon excitations, and open up new possibilities for controlling nanoscale liquid flows through the solid walls' electronic degrees of freedom.
Article
Physics, Applied
M. Rahimi, K. Sobnath, F. Mallet, P. Lafarge, C. Barraud, W. Daney de Marcillac, D. Fournier, M. L. Della Rocca
Summary: In this study, we performed a comprehensive thermoelectric characterization of thin flakes (5-6 nm) of tungsten diselenide (WSe2) and multilayer graphene (MLGN) deposited on hexagonal boron nitride (h-BN) using electric and thermoelectric measurements coupled with modulated thermoreflectance (MTR). We obtained the anisotropic thermal conductivities of each device's layer by conducting MTR scans on each individual flake. Our results demonstrate the possibility of performing selective nondestructive measurements of the thermal conductivity of 2D materials embedded in device configurations.
PHYSICAL REVIEW APPLIED
(2023)
