Article
Chemistry, Multidisciplinary
Shaojian Li, Zongyuan Zhang, Chuan Xu, Zhen Liu, Xiaorui Chen, Qi Bian, Habakubaho Gedeon, Zhibin Shao, Lijun Liu, Zhibo Liu, Ning Kang, Hui-Ming Cheng, Wencai Ren, Minghu Pan
Summary: The study on Cr-doped Mo2C crystals shows that Cr doping suppresses superconductivity in Mo2C and induces the appearance of incommensurate density waves (IDW), which could lead to charge density wave (CDW) phases.
Article
Chemistry, Physical
Zhengjing Zhao, Donglai Li, Junlin Yang, Jingbo Li, Haibo Jin
Summary: In this work, Nb-doped VO2 films were prepared by hydrothermal process, and the effects of Nb dopants on the metal-insulator transition (MIT) behavior were investigated. It was found that the valence variation of Nb dopants can modify the band structure of VO2, and Nb5+ dopants promote the MIT transition at a higher rate compared to Nb4+ dopants. Moreover, the Nb doping does not significantly affect the optical properties of VO2, indicating its promising applications in smart window and other optical switching devices.
APPLIED SURFACE SCIENCE
(2023)
Article
Physics, Applied
Larisa Patlagan, Idan Sthzeglowski, George. M. M. Reisner, Bertina Fisher
Summary: Pure VO2, GexV1-xO2 (x < 0.2), and AlxV1-xO2 (x = 0.02) exhibit the insulator-metal-transition (IMT) at above room temperature. AlxV1-xO2 also exhibits an insulator-insulator-transition (IIT) at a lower temperature than IMT. Both transitions can be induced by external or Joule heating. The I-V characteristics of the investigated samples show distinct features of IIT at low currents and IMT at high currents. In this study, a comparative analysis of the I-V characteristics of pure and doped VO2 single crystals was conducted to separate thermal and non-thermal electric field effects.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Prathyush P. Poduval, Sankar Das Sarma
Summary: We theoretically investigate the issue of doping induced insulator to metal transition in bulk semiconductors by analyzing the density-dependent mean free path and the Anderson localization transition controlled by the Ioffe-Regel-Mott (IRM) criterion. We calculate the mean free path on the highly doped metallic side considering carrier scattering by ionized dopants. The Coulomb disorder of the charged dopants is screened by the carriers themselves, leading to an integral equation for localization. By solving this equation analytically and numerically, we provide detailed results for the critical density of the doping induced metal-insulator transition.
Article
Physics, Applied
G. M. Hunt, J. A. Miragliotta, J. Ginn, A. P. Warren, D. B. Shrekenhamer
Summary: This article introduces a passive and adaptive thermal management system that utilizes the properties of VO2 material to provide insulation at low temperatures and heat dissipation at high temperatures, thereby reducing energy consumption. By doping VO2 with high valence tungsten, the transition temperature can be close to room temperature. By carefully engineering the thickness and doping of the VO2 layer in the multilayer film, a 50% emissive contrast was maintained across the 8-13 μm spectral region.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Otto Cranwell Schaeper, Johannes E. Froch, Sejeong Kim, Zhao Mu, Milos Toth, Weibo Gao, Igor Aharonovich
Summary: This study demonstrates the fabrication of functional photonic devices based on 4H Silicon Carbide using a Faraday cage-based oblique angle etch method. The fabricated suspended microring resonators exhibit high-quality factors, showing potential for enhancing the properties of SiC in integrated on chip quantum photonics in the future.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
Article
Chemistry, Multidisciplinary
Ryota Teruya, Tetsu Sato, Masahiro Yamashita, Noriaki Hanasaki, Akira Ueda, Masaki Matsuda
Summary: This study demonstrates the reversible control of a molecular Mott insulator by chemical carrier doping and dedoping, highlighting the importance of chemical doping in molecular Mott insulators.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Leyi Loh, Yifeng Chen, Junyong Wang, Xinmao Yin, Chi Sin Tang, Qi Zhang, Kenji Watanabe, Takashi Taniguchi, Andrew T. S. Wee, Michel Bosman, Su Ying Quek, Goki Eda
Summary: Impurity doping is a viable approach for improving optical response in semiconductors, but can lead to broad emissions that hinder materials engineering. In this study, a well-defined impurity-induced emission was observed in rhenium-doped monolayer WS2, with neutral impurity centers responsible for the emission. Additionally, calculations suggest that the emission is attributed to transitions between spin-split upper Re band and the valence band edge.
Article
Chemistry, Physical
Dong Su Jeon, Tukaram D. Dongale, Tae Geun Kim
Summary: The use of NbO2 as a selector device in crossbar array-based resistive memory is proposed to address the sneak current path problem, allowing for rapid insulator-metal transition and achieving a high ION/IOFF ratio.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Electrical & Electronic
Andrea Pulici, Stefano Kuschlan, Gabriele Seguini, Fabiana Taglietti, Marco Fanciulli, Riccardo Chiarcos, Michele Laus, Michele Perego
Summary: Ex-situ doping of 30 nm thick SOI substrates was achieved by using polymers terminated with a doping containing moiety. The polymers created a phosphorus delta-layer at the interface between the Si device layer and a SiO2 capping layer. P atoms were driven in by annealing the samples in a RTP system at temperatures ranging from 900 to 1200 degrees C. The uniform dopant concentration throughout the entire Si device layer was confirmed by ToF-SIMS measurements.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Multidisciplinary Sciences
Ge Li, Donggang Xie, Hai Zhong, Ziye Zhang, Xingke Fu, Qingli Zhou, Qiang Li, Hao Ni, Jiaou Wang, Er-jia Guo, Meng He, Can Wang, Guozhen Yang, Kuijuan Jin, Chen Ge
Summary: This study reports a non-volatile multi-level control of vanadium dioxide (VO2) films through oxygen stoichiometry engineering, which can be used for bioinspired neuromorphic vision components. A proof-of-principle neuromorphic ultraviolet sensor with integrated sensing, memory, and processing functions at room temperature is demonstrated, showing its potential application in artificial vision systems.
NATURE COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Xi-Wen Chen, Rao Huang
Summary: This study discovers the transformation of step-bunching morphology on the 4H-SiC surface during repeated annealing experiments and analyzes the surface energetics using experimental observations and molecular dynamics simulations. The research provides insights into the mechanisms of step-bunching formation and transformation, which are important for the preparation and application of SiC in the next generation of nanoelectronic technology.
ACS APPLIED NANO MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
G. W. C. Baker, C. Chan, A. B. Renz, Y. Qi, T. Dai, F. Li, V. A. Shah, P. A. Mawby, M. Antoniou, P. M. Gammon
Summary: A class of vertical 1700-V 4H-SiC SJ Schottky diodes were simulated and optimized to achieve results below the unipolar limit, with practical and cost-effective realization. By introducing an angled trench sidewall and additional doping regions, the device performance was improved and the production success rate was increased. The balance between specific ON-resistance and implantation window can be adjusted by tuning the doping level of the additional regions, providing flexibility for performance optimization.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2021)
Article
Multidisciplinary Sciences
Wei-Tin Chen, Chin-Wei Wang, Ching-Chia Cheng, Yu-Chun Chuang, Arkadiy Simonov, Nicholas C. Bristowe, Mark S. Senn
Summary: The phase diagrams of LaMnO3 perovskites have been intensively studied due to colossal magnetoresistance exhibited around the 3th/8 doping level. Phase segregation between ferromagnetic metallic and antiferromagnetic insulating states prevents a complete understanding of the orbital ordered state at this doping level. Through crystallographic analysis, it was found that the superposition of two distinct lattice modes leads to a striping of Mn3+ and Mn3.5+ layers, ultimately causing cancellation of Jahn-Teller-like displacements at the critical doping level and melting of long range orbital order.
NATURE COMMUNICATIONS
(2021)
Article
Nanoscience & Nanotechnology
T. Ciuk, L. Ciura, P. P. Michalowski, J. Jagiello, A. Dobrowolski, K. Pietak, D. Kalita, M. Wzorek, R. Budzich, D. Czolak, A. Kolek
Summary: This report introduces a novel method based on low-frequency noise analysis for evaluating the quality and pattern of inhomogeneity in intentionally-aged Hall effect sensors. By comparing the measured noise with the calculated noise for a homogeneous sensor, we speculate about the presence of unintentional contamination in the active regions of the sensors. Through in-depth structural characterization, we discover that the graphene's characteristics and interface make it susceptible to uncontrolled contamination, leading to blistering of the material.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2022)
Article
Chemistry, Multidisciplinary
Jingyuan Linda Zhang, Hitoshi Ishiwata, Thomas M. Babinec, Marina Radulaski, Kai Mueller, Konstantinos G. Lagoudakis, Constantin Dory, Jeremy Dahl, Robert Edgington, Veronique Souliere, Gabriel Ferro, Andrey A. Fokin, Peter R. Schreiner, Zhi-Xun Shen, Nicholas A. Melosh, Jelena Vuckovic
Article
Engineering, Electrical & Electronic
Tony Abi-Tannous, Maher Soueidan, Gabriel Ferro, Mihai Lazar, Christophe Raynaud, Berangere Toury, Marie-France Beaufort, Jean-Francois Barbot, Olivier Dezellus, Dominique Planson
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2016)
Article
Materials Science, Multidisciplinary
Alexandre Jaud, Laurent Auvray, Abdelkarim Kahouli, Tony Abi-Tannous, Francois Cauwet, Gabriel Ferro, Christian Brylinski
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2017)
Article
Crystallography
Alexandre Jaud, Laurent Auvray, Abdelkarim Kahouli, Tony Abi-Tannous, Sebastien Linas, Gabriel Ferro, Christian Brylinski
JOURNAL OF CRYSTAL GROWTH
(2017)
Article
Materials Science, Multidisciplinary
S. Sejil, M. Lazar, D. Carole, C. Brylinski, D. Planson, G. Ferro, C. Raynaud
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2017)
Article
Materials Science, Multidisciplinary
Mikhail Chubarov, Frederic Mercier, Sabine Lay, Frederic Charlot, Alexandre Crisci, Stephan Coindeau, Thierry Encinas, Gabriel Ferro, Roman Reboud, Raphael Boichot
Article
Chemistry, Physical
Sven Tengeler, Bernhard Kaiser, Gabriel Ferro, Didier Chaussende, Wolfram Jaegermann
APPLIED SURFACE SCIENCE
(2018)
Article
Multidisciplinary Sciences
Gabriel Ferro, Didier Chaussende
SCIENTIFIC REPORTS
(2017)
Article
Materials Science, Multidisciplinary
Taguhi Yeghoyan, Kassem Alassaad, Veronique Souliere, Gabriel Ferro, Marina Gutierrez, Daniel Araujo
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2019)
Article
Crystallography
Gabriel Ferro, Didier Chaussende, Nikolaos Tsavdaris
JOURNAL OF CRYSTAL GROWTH
(2019)
Review
Optics
Marina Rodulaski, Jingyuan Linda Zhang, Yan-Kai Tzeng, Konstantinos G. Lagoudakis, Hitoshi Ishiwata, Constantin Dory, Kevin A. Fischer, Yousif A. Kelaita, Shuo Sun, Peter C. Maurer, Kassem Alassaad, Gabriel Ferro, Zhi-Xun Shen, Nicholas A. Melosh, Steven Chu, Jelena Vuckovic
LASER & PHOTONICS REVIEWS
(2019)
Article
Chemistry, Physical
Taguhi Yeghoyan, Kassem Alassaad, Veronique Souliere, Thierry Douillard, Davy Carole, Gabriel Ferro
Article
Materials Science, Multidisciplinary
Judith Woerle, Brett C. Johnson, Corrado Bongiorno, Kohei Yamasue, Gabriel Ferro, Dipanwita Dutta, Thomas A. Jung, Hans Sigg, Yasuo Cho, Ulrike Grossner, Massimo Camarda
PHYSICAL REVIEW MATERIALS
(2019)
Article
Physics, Condensed Matter
Natalia Alyabyeva, Jacques Ding, Mylene Sauty, Judith Woerle, Yann Jousseaume, Gabriel Ferro, Jeffrey C. McCallum, Jacques Peretti, Brett C. Johnson, Alistair C. H. Rowe
Summary: Scanning tunneling luminescence microscopy (STLM) and scanning tunneling spectroscopy (STS) were used to study step-bunched, oxidized 4H-SiC surfaces. It was found that the risers on the surface contain a higher density of surface charge traps and exhibit intense sub-gap light emission.
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2023)
Article
Materials Science, Ceramics
Loren Acher, Hyewon Ji, Nicolas Garino, Florian Massuyeau, Laurie Pontille, Francois Cauwet, Arnaud Brioude, Stephane Jobic, Gabriel Ferro, Davy Carole
Summary: Nickel titanate is a yellow-brown pigment with a crystal structure similar to corundum and hematite. It has been found that nickel titanate can change its color with temperature, exhibiting thermochromic properties. The powders were synthesized using a modified Pechini method and then subjected to calcination at 700 degrees C. The thermochromic behavior in the temperature range of 20 degrees C to 400 degrees C was studied by determining the colorimetric L*a*b* parameters. The hue continuously shifts from yellow-brown to red-brown, with L*a*b* parameters changing from 60.4/19.2/58.5 to 42.9/30.5/43.1. It was also observed that the transparency window shifted from 550-650 nm at room temperature to 575-650 nm at 400 degrees C, explaining the color change. Additionally, the effects of Cu or Co doping on the optical and thermochromic properties of nickel titanate were investigated.
CERAMICS INTERNATIONAL
(2023)
