Article
Nanoscience & Nanotechnology
Chexin Li, Xiaoguang Xu, Yingli Ma, Bing Zhao, Tanzhao Zhang, Le Wang, Yong Wu, Kangkang Meng, Jikun Chen, Yong Jiang
Summary: By adding an oxide layer on black phosphorus, a Co/MgO/BP-based non-local spin valve is created, simplifying the fabrication of spintronic devices based on 2D materials and accelerating their applications.
ADVANCED ELECTRONIC MATERIALS
(2022)
Article
Energy & Fuels
Baitang Jin, Shiguang Li, Xinhua Liang
Summary: The study deposited highly dispersed nickel nanoparticles on aluminum oxide using atomic layer deposition, and found that the addition of MgO increased the basicity of catalyst surfaces, assisting CO2 adsorption and activation. Although the formation of NiO-MgO solid solution did not improve overall reducibility, the interaction between reduced Ni nanoparticles and MgO inhibited sintering and provided sufficient metal-support interface for CO2 activation, leading to higher methane reforming rates.
Article
Chemistry, Multidisciplinary
Yuanlu Tsai, Zhiteng Li, Shaojie Hu
Summary: This article reviews the current developments in atomic layer technology for spintronics, including atomic layer deposition (ALD) and atomic layer etching (ALE). The importance of these techniques in device fabrication is discussed, along with their applications in various materials. The article also compares the critical factors of ALD and ALE and explores the future prospects and challenges of atomic layer technology in spintronics.
Article
Chemistry, Multidisciplinary
Cara-Lena Nies, Suresh Kondati Natarajan, Michael Nolan
Summary: Prolonging the lifetime of Cu as an interconnect metal in future nanoelectronic devices is a significant challenge, and researchers are investigating new materials that combine diffusion barrier and seed liner properties to enhance electrical conductance.
Article
Chemistry, Analytical
Clara Whyte Ferreira, Roselien Vercauteren, Laurent A. Francis
Summary: A robust fabrication method for stable mesoporous silicon membranes was developed using standard microfabrication techniques, passivated through atomic layer deposition of different metal oxides for biosensing applications, demonstrating selective optical detection capabilities for Bacillus cereus bacterial lysate.
Article
Materials Science, Coatings & Films
Hanjorg Wagner, Valentin Ripka, Andrea Dellith, Jan Dellith, Florian Wittkaemper, Uwe Hubner, Mario Ziegler
Summary: This paper reports the testing of high performance plasmonic broadband absorbing black coatings fabricated by metastable atomic layer deposition (MS-ALD) for space applications. Humidity testing, thermal cycling, exposure to atomic oxygen, and adhesion testing were used as testing methods. The results show that the films with thickness greater than 9 μm are able to withstand the humidity tests, thermal cycling, and exposure to atomic oxygen without significant loss of their broadband absorption. However, the adhesion of the films has not yet been sufficient to meet the requirements posed by the space environment. Therefore, the authors propose to investigate the coating of the MS-ALD films with high refractive index coatings.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2023)
Article
Materials Science, Multidisciplinary
Florian Wittkaemper, Theo Scholtes, Sven Linzen, Mario Ziegler, Ronny Stolz
Summary: Measurements of weak magnetic fields require a small distance between the sensor and the to-be-measured object. Optically pumped magnetometers utilize laser light and the Zeeman effect in alkali vapor cells to measure these fields. By comparing the implementation of gold mirrors with and without a passivation layer, it is found that mirrors with a passivation layer have higher reflectivity and can be used in alkali vapor cells for optically pumped magnetometers.
Article
Chemistry, Physical
Ravindra Mehta, Misook Min, Ridwan F. Hossain, Gustavo A. Saenz, Gerardo Gamboa, Anupama B. Kaul
Summary: In this study, stable electronic devices based on black phosphorus (BP) were successfully fabricated using low-cost, scalable additive manufacturing techniques with ink-jet printing. The stability of BP was greatly improved by passivating the surface with ionic liquids (ILs), which prevented oxidative degradation. This research demonstrates the potential for integrating BP into printed and flexible electronics on a large scale, utilizing its direct bandgap characteristics.
Article
Chemistry, Physical
Yingfeng He, Meiling Li, Huiyun Wei, Yimeng Song, Peng Qiu, Mingzeng Peng, Xinhe Zheng
Summary: The study found that increasing growth temperature leads to higher O content and surface roughness of GaN thin films, as well as diffusion of GaN into Kapton when the temperature exceeds 250 degrees C. Introducing Al(2)O(3) or AlN can significantly reduce oxygen impurities, suppress GaN diffusion into Kapton, and improve the surface morphology of GaN deposited on Kapton.
APPLIED SURFACE SCIENCE
(2021)
Article
Energy & Fuels
Gurleen Kaur, Tanmay Dutta, Ranjani Sridharan, Xin Zheng, Aaron Danner, Rolf Stangl
Summary: The study shows that tunnel layers with high negative charge can enhance the hole extraction ability of passivated contacts, particularly for PEDOT:PSS capped passivated contacts, leading to higher efficiency potential compared to conventional SiOx tunnel layers.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Nanoscience & Nanotechnology
Yujin Lee, Taewook Nam, Seunggi Seo, Hwi Yoon, Il-Kwon Oh, Chong Hwon Lee, Hyukjoon Yoo, Hyun Jae Kim, Wonjun Choi, Seongil Im, Joon Young Yang, Dong Wook Choi, Choongkeun Yoo, Ho-Jin Kim, Hyungjun Kim
Summary: The study demonstrates the excellent hydrogen barrier properties of ALD-grown Al2O3 in improving the stability of a-IGZO TFTs. Different behaviors were observed when hydrogen was incorporated into H2O-Al2O3 and O3-Al2O3, with O3-Al2O3 showing remarkable hydrogen barrier performance.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Wenling Li, Jiangong Cheng, Zilong Zheng, Qiaohong Liu, Feng Geng, Hui Yan
Summary: In this study, the energy diagrams and reaction activation energies of aminosilane precursors in ALD and silanol precursors in RALD were investigated using first-principles based on density functional theory. It was found that BTBAS had the lowest energy barrier in the rate-determining step, suggesting that the rapid rate of RALD might be due to the addition of trimethylaluminum catalyst. The correlation between bond length and reaction activation energies provides a new perspective for studying these processes. This research helps clarify the reaction processes and facilitates the design and preparation of more efficient precursors.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Ying Wu, Er-Tao Hu, Qing-Yuan Cai, Jing Wang, Zheng-Yong Wang, Hua-Tian Tu, Ke-Han Yu, Liang-Yao Chen, Wei Wei
Summary: By employing ALD Al2O3 layer, diffusion of metal atoms in the multilayer solar selective absorber was effectively suppressed, enhancing its thermal stability. The designed sample exhibited high solar absorptance and low thermal emittance, and demonstrated stable operation at 500 degrees C, making it suitable for applications in middle-temperature solar thermal conversion systems.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Nilay Maji, J. Panda, A. Santosh Kumar, T. K. Nath
Summary: In this study, efficient electrical spin injection and detection from NFO into p-Si via MgO tunnel barrier was achieved and proved to be promising. The use of oxide magnetic materials in spin injection and detection for room temperature spin-based electronic devices has been demonstrated.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Multidisciplinary Sciences
A. Yu. Mironov, D. M. Silevitch, S. V. Postolova, M. V. Burdastyh, T. Proslier, T. I. Baturina, T. F. Rosenbaum, V. M. Vinokur
Summary: The research reveals that in the proximity of the superconductor-insulator transition, TiN and NbTiN thin films exhibit self-induced electronic granularity and become random arrays of superconducting granules coupled via Josephson links. This results in a transition of the impedance from capacitive to inductive behavior, where the inductive component is due to superconducting droplets and the capacitive component is from effective Josephson junctions capacitances.
SCIENTIFIC REPORTS
(2021)
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
Physics, Applied
N. Figueiredo-Prestes, P. Tsipas, S. Krishnia, P. Pappas, J. Peiro, S. Fragkos, V. Zatko, A. Lintzeris, B. Dlubak, S. Chaitoglou, M. Heuken, N. Reyren, H. Jaffres, P. Seneor, A. Dimoulas, J. M. George
Summary: With the development of technologies utilizing quantum phenomena, research on alternative materials and heterostructure engineering has been opened up. This study focuses on the magnetotransport properties of TI/2D-FM heterostructures composed of Cr1+delta Te2/Bi2Te3 stacks grown by molecular-beam epitaxy. The results reveal high levels of effective torques, interfacial magnetoresistance effects, and anomalies in the anomalous Hall effect. The relevance of the TI/2D-FM interface and the preservation of polarized surface states are demonstrated.
PHYSICAL REVIEW APPLIED
(2023)
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, Applied
Sajid Husain, Nicholas Figueiredo-Prestes, Olivier Fayet, Sophie Collin, Florian Godel, Eric Jacquet, Nicolas Reyren, Henri Jaffres, Jean-Marie George
Summary: Ferrimagnetic insulators (FIMIs) are promising materials for spin-orbit torque (SOT) devices due to their ability to propagate a spin current without Ohmic losses. The origin of the anomalous Hall effect (AHE) in FIMI/heavy metal (HM) systems has remained unclear. In this study, we demonstrate that the AHE and spin Hall magnetoresistance (SMR) in FIMI/HM bilayer heterostructures have the same origin.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
H. Naganuma, M. Uemoto, H. Adachi, H. Shinya, I. Mochizuki, M. Kobayashi, A. Hirata, B. Dlubak, T. Ono, P. Seneor, J. Robertson, K. Amemiya
Summary: A crystallographically heterogeneous moire interface is formed between hexagonal graphene (Gr) and tetragonal L1(0)-FePd alloy via van der Waals forces. Robust interfacial perpendicular magnetic anisotropy is observed on the L1(0)-FePd side of the Gr/L1(0)-FePd heterogeneous interface. This study focuses on the Gr side of the interface.
JOURNAL OF PHYSICAL CHEMISTRY C
(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, Applied
Pauline Dufour, Thomas Maroutian, Maxime Vallet, Kinnary Patel, Andre Chanthbouala, Charlotte Jacquemont, Lluis Yedra, Vincent Humbert, Florian Godel, Bin Xu, Sergey Prosandeev, Laurent Bellaiche, Mojca Otonicar, Stephane Fusil, Brahim Dkhil, Vincent Garcia
Summary: The antiferroelectric state of 45-nm-thick epitaxial thin films of PbZrO3 is observed through the characteristic structural periodicity of dipoles and the double hysteresis of the polarization-electric field response. A transition to a ferroelectric-like state is found to occur in a large temperature window. Atomistic simulations confirm the presence and origin of the ferroelectric state in the films. Electric-field-induced ferroelectric transitions are detected via piezoresponse force microscopy.
APPLIED PHYSICS REVIEWS
(2023)
Article
Chemistry, Physical
Kathinka Gerlinger, Bastian Pfau, Martin Hennecke, Lisa-Marie Kern, Ingo Will, Tino Noll, Markus Weigand, Joachim Graefe, Nick Traeger, Michael Schneider, Christian M. Guenther, Dieter Engel, Gisela Schuetz, Stefan Eisebitt
Summary: In this study, we demonstrate time-resolved scanning X-ray microscopy measurements using a tailored infrared pump laser at a scanning transmission X-ray microscope. By controlling the heat load on the sample, we can conduct destruction-free measurements at a high repetition rate. Our work provides new opportunities to study photo-induced dynamics on the nanometer scale, with access to picosecond to nanosecond time scales, which is of technological relevance, especially in the field of magnetism.
STRUCTURAL DYNAMICS-US
(2023)
Article
Chemistry, Multidisciplinary
Pauline Dufour, Amr Abdelsamie, Johanna Fischer, Aurore Finco, Angela Haykal, Martin F. Sarott, Sara Varotto, Cecile Carretero, Sophie Collin, Florian Godel, Nicolas Jaouen, Michel Viret, Morgan Trassin, Karim Bouzehouane, Vincent Jacques, Jean-Yves Chauleau, Stephane Fusil, Vincent Garcia
Summary: Researchers have achieved the stabilization of a single-domain ferroelectric and spin cycloid state in the room-temperature magnetoelectric multiferroic BiFeO3, which is coupled to the noncollinear antiferromagnetic state. They have also discovered that anisotropic in-plane strain can be used as a powerful tool to control the antiferromagnetic state. The thickness limit of the coexisting electric and magnetic orders has been determined and the suppression of the spin cycloid induced by the magnetoelectric interaction in ultrathin films has been visualized.
Article
Chemistry, Multidisciplinary
Lisa-Marie Kern, Bastian Pfau, Victor Deinhart, Michael Schneider, Christopher Klose, Kathinka Gerlinger, Steffen Wittrock, Dieter Engel, Ingo Will, Christian M. Guenther, Rein Liefferink, Johan H. Mentink, Sebastian Wintz, Markus Weigand, Meng-Jie Huang, Riccardo Battistelli, Daniel Metternich, Felix Buettner, Katja Hoeflich, Stefan Eisebitt
Summary: This study demonstrates the precise control of skyrmion nucleation by nanopatterning the material with an ion beam, enabling future studies and applications of skyrmion dynamics.
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)
