Article
Chemistry, Multidisciplinary
Wenhuai Li, Mengran Li, Yanan Guo, Zhiwei Hu, Chuan Zhou, Helen E. A. Brand, Vanessa K. Peterson, Chih-Wen Pao, Hong-Ji Lin, Chien-Te Chen, Wei Zhou, Zongping Shao
Summary: This study reveals the importance of local cation arrangement in oxygen kinetics in perovskite oxides. By controlling factors such as lattice geometry, cobalt states, and oxygen vacancies, the researchers found that co-doping can enhance cation dispersion and improve oxygen ion migration, leading to improved oxygen reduction activity.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Zhao Li, Rui Wang, Shuaijin Wu, Zhipeng Xue, Daming Zhu, Jianxin Zou, Xiaolong Li
Summary: The study demonstrates that metal cations can self-assemble with graphene oxide nanosheets into a superlattice structure through electrostatic interactions and subsequent annealing can result in graphene-based metal oxide nanosheets. This work provides a new perspective for understanding the interactions and growth behaviour of metal cations and graphene oxide.
Article
Energy & Fuels
M. K. Nikhil Chandran, G. N. Suresh Babu, M. Sathish
Summary: A novel class of CuMn2O4 (CMO) nanoparticles were synthesized and used as an anode in sodium-ion batteries. The CuMn2O4 nanoparticles were distributed homogeneously and interconnected within the graphene sheet. The CMO/G architecture allowed for adequate void space, improving reaction sites and electron transport, resulting in significant electrochemical performance as an anode in sodium-ion batteries.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Multidisciplinary
Jiheon Kim, Wonjae Ko, Ji Mun Yoo, Vinod K. Paidi, Ho Yeon Jang, Michael Shepit, Jongmin Lee, Hogeun Chang, Hyeon Seok Lee, Jinwoung Jo, Byung Hyo Kim, Sung-Pyo Cho, Johan Lierop, Dokyoon Kim, Kug-Seung Lee, Seoin Back, Yung-Eun Sung, Taeghwan Hyeon
Summary: Multi-metal oxide (MMO) materials have potential in catalyst design. However, understanding the (electro)catalytic activity of MMOs is limited due to their complex multi-element nature. This study synthesized uniform-sized multi-metal spinel oxide nanoparticles and systematically studied the contributions of each element to enhance the electrocatalytic oxygen reduction reaction (ORR) activity.
ADVANCED MATERIALS
(2022)
Article
Energy & Fuels
Haili Liu, Jie Wei, Jing Xie, Heyun Liu, E. Jiaqiang, Wang Chen, Xi Zeng, Wenhao Guo
Summary: In this study, the effects of temperature, oxygen concentration, and type and mass fraction of metal oxide on the combustion of P. giganteum were analyzed using a tube furnace device to determine the optimal conditions for controlling NOx emissions. The results showed that increasing the temperature from 600 to 900 degrees C resulted in a 261.17% increase in NOx emissions. The oxygen concentration initially increased NOx emissions, but eventually stabilized. The type and mass fraction of metal oxide had a significant impact on NOx emissions, with Fe2O3 having the best effect.
Article
Multidisciplinary Sciences
Shuya Guo, Jingrou Tan, Hengbin Zhang, Jinguang Wang, Tianhao Ji, Labao Zhang, Xiaolong Hu, Jian Chen, Jun Xie, Kai Zou, Yun Meng, Xiaomin Bei, Ling-An Wu, Qi Chen, Hao Wang, Xuecou Tu, Xiaoqing Jia, Qing-Yuan Zhao, Lin Kang, Peiheng Wu
Summary: This study reports a free-running X-ray single-photon detector with a timing resolution of 20 ps and demonstrates a precision of 0.87 ps in the arrival-time difference of X-ray photon measurements.
NATIONAL SCIENCE REVIEW
(2023)
Article
Energy & Fuels
Maalavika S. Iyer, Ilangovan Rajangam
Summary: This study is an experimental comparison of various binary transition metal oxides (BTMOs) and their application as electrode material for supercapacitor (SC). The synthesized CoMoO4, NiMoO4, MnMoO4, and CuMoO4 nanostructures were tested as electrode materials for coin-cell based SC. Among them, NiMoO4 electrode showed excellent electrochemical performance and is a prospective candidate for supercapacitor application.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Analytical
Takeshi Hashishin, Haruka Taniguchi, Fei Li, Hiroya Abe
Summary: This study aimed to identify a useful high-entropy source for gas detection by evaluating spinel oxides with five cations. The results showed that these spinel oxides exhibited different response characteristics to different gases, with a particularly selective response to hydrogen sulfide (H2S).
Article
Chemistry, Physical
Jiabin Wu, Qun Li, Christopher E. Shuck, Kathleen Maleski, Husam N. Alshareef, Jun Zhou, Yury Gogotsi, Liang Huang
Summary: An asymmetric pseudocapacitor was constructed using Ti3C2Tx MXene as the negative electrode and vanadium-doped MnO2 as the positive electrode in a neutral 1M Li2SO4 electrolyte, operating within a 2.1 V voltage window and achieving a maximum energy density of 46 Wh/kg. This study demonstrates the potential of using MXene electrodes to expand the working voltage window of traditional redox-capable materials.
Article
Physics, Applied
Sunjie Hu, Meng Xu, Cong Peng, Longlong Chen, Hai Liu, Xifeng Li
Summary: Top-gate structured W: F co-doped Zn-Sn-O (ZTO) thin-film transistors (TFTs) with excellent stability were prepared by the solution process. Compared with undoped ZTO TFT, the W: F co-doped ZTO TFTs showed an increased mobility from 1.87 to 3.14 cm(2) V-1 s(-1) and a decreased subthreshold swing from 0.192 to 0.157 V/dec. The enhanced stability of W: F co-doped ZTO TFTs was attributed to the effective suppression of defect states in ZTO films by W: F co-doping.
APPLIED PHYSICS LETTERS
(2023)
Review
Chemistry, Analytical
B. C. Tladi, R. E. Kroon, H. C. Swart, D. E. Motaung
Summary: This work reviews the current advances in LPG gas sensors that operate at room temperature. The influences of synthesis methods and parameters, doping, and use of catalysts on sensing performance are discussed, as well as the formation of heterostructures using semiconducting metal oxides, polymers, and graphene-based materials. The review also focuses on advancements in next-generation gas sensors such as wireless detection of LPG leakage, self-powered sensors, and artificial intelligent systems. The use of smartphones for cost-efficient and portable monitoring of LPG, as well as the utilization of IoT for leak detection, are also discussed.
ANALYTICA CHIMICA ACTA
(2023)
Article
Chemistry, Multidisciplinary
Panwang Guo, Bin Tian, Jing Liang, Xiuping Yang, Guilin Tang, Quancai Li, Qun Liu, Ke Zheng, Xiong Chen, Wei Wu
Summary: High-performance flexible resistive-type humidity sensors are fabricated by screen-printing method using hexagonal tungsten oxide as the humidity-sensing material. These sensors exhibit high sensitivity, good repeatability, outstanding flexibility, low hysteresis, and fast response in a wide relative humidity range. They have immense potential in various applications including wearable devices, non-contact measurements, and packaging opening state monitoring.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Jing Peng, Weicai Zhang, Mingtao Zheng, Hang Hu, Yong Xiao, Yingliang Liu, Yeru Liang
Summary: By using a high temperature in situ deoxidation strategy to introduce intrinsic nickel component, the electrochemical kinetics of NiO were enhanced. The Ni-NiO heterojunction significantly improved electronic conductivity and ion diffusion properties, leading to improved charge transfer efficiency and rate performance in lithium-ion batteries.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Physical
Carl R. Conti, James R. McBride, Geoffrey F. Strouse
Summary: Understanding the impact of dopant deactivation on plasmon frequency and extinction is crucial for designing plasmonic semiconductor nanocrystals. The study found that dopant/host lattice mismatch leads to inefficient carrier generation, potentially due to the formation of local spinel-like inclusions. Different dopants have unique correction factors, highlighting the effect of varying ionic radii on the resulting plasmon resonance.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Review
Chemistry, Multidisciplinary
Shasha Zhao, Jiaqian Zhang, Lei Fu
Summary: Liquid metals have shown great potential in the fabrication of 2D metal oxides due to their solubility, fluidity, reactivity, and ability to act as a symmetric matched substrate for growing high-quality materials. Their unique features make them promising candidates for the further development of 2DMOs.
ADVANCED MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Dongyi Qin, Kazumasa Iida, Takafumi Hatano, Hikaru Saito, Yiming Ma, Chao Wang, Satoshi Hata, Michio Naito, Akiyasu Yamamoto
Summary: In this study, epitaxial Ba1-xKxFe2As2 thin films were successfully grown by molecular-beam epitaxy, enhancing the competitiveness of key materials for magnetic field applications. With the combination of fluoride substrates and a low growth temperature, epitaxial thin films grown on CaF2 exhibited excellent superconducting properties at 4K.
PHYSICAL REVIEW MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Yuki K. Wakabayashi, Shingo Kaneta-Takada, Yoshiharu Krockenberger, Kosuke Takiguchi, Shinobu Ohya, Masaaki Tanaka, Yoshitaka Taniyasu, Hideki Yamamoto
Summary: The study investigated the structural and transport properties of highly Ru-deficient SrRu0.7O3 thin films, revealing that Ru vacancies within lattices dominate the electrical and magnetic properties while disorders near the interface have more influence on thin films with smaller thicknesses. The crystallinity and Curie temperature show differences between SrRu0.7O3 and SrRuO3. Despite the large Ru deficiency, SrRu0.7O3 films exhibit metallic conduction, but do not display the Weyl fermion transport phenomenon observed in stoichiometric SrRuO3 films. The (magneto)transport properties suggest that carrier scattering due to Ru vacancies is important for SrRu0.7O3, and proper stoichiometry control is necessary for utilizing the full potential of SrRuO3.
Article
Chemistry, Multidisciplinary
Yoshiharu Krockenberger, Ai Ikeda, Hideki Yamamoto
Summary: Research suggests that tuning the copper-oxygen bond configuration to the state of minimal energy is crucial for the emergence of high-temperature superconductivity, with differences in atomic stripe formation on CuO2 planes in infinite-layer phases observed in different compounds.
Article
Materials Science, Multidisciplinary
Kazumasa Iida, Dongyi Qin, Chiara Tarantini, Takafumi Hatano, Chao Wang, Zimeng Guo, Hongye Gao, Hikaru Saito, Satoshi Hata, Michio Naito, Akiyasu Yamamoto
Summary: By controlling grain boundary engineering, high critical current density and strong pinning efficiency for K-doped BaFe2As2 have been achieved, providing a simple and industrially scalable approach to enhance superconducting properties.
NPG ASIA MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Yoshiharu Krockenberger, Ai Ikeda, Hideki Yamamoto, Hiroo Omi
Summary: The study demonstrates the successful epitaxial growth of Sr5Au2O8 thin films on SrTiO3 substrates using a high-efficiency radio-frequency-operated atomic oxygen source as an oxidizing agent. By controlling the atomic beam fluxes of strontium and gold and capping the thin films with Se or Au layers, the sensitivity of Sr5Au2O8 thin films to environmental agents was addressed.
PHYSICAL REVIEW MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Yuki K. Wakabayashi, Masaki Kobayashi, Yukiharu Takeda, Kosuke Takiguchi, Hiroshi Irie, Shin-ichi Fujimori, Takahito Takeda, Ryo Okano, Yoshiharu Krockenberger, Yoshitaka Taniyasu, Hideki Yamamoto
Summary: The study confirmed the high itinerancy and long quantum lifetimes of quasiparticles in the Ru 4d t(2g)-O 2p hybridized valence band, as well as the large orbital magnetic moment of oxygen ions induced by strong orbital hybridization. The high-quality SrRuO3 film with a residual resistivity ratio of 86 exhibited single-domain perpendicular magnetization and an almost ideal remanent magnetization ratio of 0.97.
PHYSICAL REVIEW MATERIALS
(2021)
Review
Physics, Applied
Yuki K. Wakabayashi, Yoshiharu Krockenberger, Takuma Otsuka, Hiroshi Sawada, Yoshitaka Taniyasu, Hideki Yamamoto
Summary: This review summarizes the methods of growing ultra-high-quality SrRuO3 films and their novel physics, as well as discusses the progress in crystal structure analyses and the electrical and magnetic properties of SrRuO3 over the last decade.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2023)
Article
Physics, Applied
Dongyi Qin, Kazumasa Iida, Zimeng Guo, Chao Wang, Hikaru Saito, Satoshi Hata, Michio Naito, Akiyasu Yamamoto
Summary: Molecular beam epitaxy successfully fabricated K-doped Ba122 superconducting thin film. The undoped Ba122 was found to be a perfect buffer layer for the epitaxial growth of K-doped Ba122. The film exhibited a high critical temperature and critical current density and can be used to create an artificial single grain boundary on oxide bicrystal substrates to study the grain boundary transport nature of K-doped Ba122.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2022)
Article
Crystallography
Hideki Yamamoto, Yoshiharu Krockenberger, Yoshitaka Taniyasu, Yuki K. Wakabayashi
Summary: Magnetism and magnetic materials, as highly researched topics in condensed matter physics, have practical applications and also continue to attract researchers in the search for new materials. Researchers used a multi-electron gun MBE apparatus to synthesize high-quality ferromagnetic oxides and found novel magnetic materials.
JOURNAL OF CRYSTAL GROWTH
(2022)
Article
Chemistry, Physical
Yuki K. Wakabayashi, Takuma Otsuka, Yoshiharu Krockenberger, Hiroshi Sawada, Yoshitaka Taniyasu, Hideki Yamamoto
Summary: The lack of an appropriate way to handle missing data has been a crucial problem in achieving innovative high-throughput materials growth with machine learning and automation techniques. In this study, a Bayesian optimization algorithm is proposed to complement the missing data in optimizing materials growth parameters. The algorithm provides a flexible optimization approach that searches a wide multi-dimensional parameter space. The effectiveness of the method is demonstrated through simulated data and its implementation in the growth of SrRuO3 using machine-learning-assisted molecular beam epitaxy, achieving high-quality films in just 35 growth runs.
NPJ COMPUTATIONAL MATERIALS
(2022)
Correction
Chemistry, Physical
Yuki K. Wakabayashi, Takuma Otsuka, Yoshiharu Krockenberger, Hiroshi Sawada, Yoshitaka Taniyasu, Hideki Yamamoto
NPJ COMPUTATIONAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Yuki K. Wakabayashi, Masaki Kobayashi, Yukiharu Takeda, Miho Kitamura, Takahito Takeda, Ryo Okano, Yoshiharu Krockenberger, Yoshitaka Taniyasu, Hideki Yamamoto
Summary: In this paper, the anisotropy of the Ru 4d and O 2p electronic structure and magnetic properties in strained SrRuO3 films is investigated. The results show that the magnetization curves for the Ru 4d and O 2p magnetic moments are identical, indicating strong magnetic coupling between the Ru and O ions. Contrary to the Bruno model, the orbital magnetic moments make a negligible contribution to the magnetic anisotropy. The contributions of strain-induced electric quadrupole moments to the magnetic anisotropy are also discussed.
PHYSICAL REVIEW MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Shingo Kaneta-Takada, Yuki K. Wakabayashi, Yoshiharu Krockenberger, Toshihiro Nomura, Yoshimitsu Kohama, Sergey A. Nikolaev, Hena Das, Hiroshi Irie, Kosuke Takiguchi, Shinobu Ohya, Masaaki Tanaka, Yoshitaka Taniyasu, Hideki Yamamoto
Summary: We have demonstrated the presence of high-mobility two-dimensional carriers with quantum oscillations in magnetic Weyl semimetal SrRuO3 epitaxial films. The quantum oscillations possibly originate from the surface Fermi arcs, and the linear thickness dependence of the phase shift provides evidence for their non-trivial nature. Additionally, the material exhibits the chiral anomaly of the Weyl nodes at low temperatures and high magnetic fields, suggesting potential applications in topological oxide electronics.
NPJ QUANTUM MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Ai Ikeda, Yoshiharu Krockenberger, Yoshitaka Taniyasu, Hideki Yamamoto
Summary: In this study, we induced superconductivity in artificial superlattices made of IL-CaCuO2 and brownmillerite Ca2Fe2O5. We found that embedding CaCuO2 slabs into Ca2Fe2O5 slabs effectively suppressed cationic defects and promoted the emergence of superconductivity. Our research highlights the significance of defect-free CuO2 planes and the importance of oxygen vacancy recovery for the induction of superconductivity.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Yuki K. Wakabayashi, Shingo Kaneta-Takada, Yoshiharu Krockenberger, Yoshitaka Taniyasu, Hideki Yamamoto
Summary: Epitaxial strain in SrRuO3 films directly influences their physical properties, offering an opportunity to tune the functionalities for electronic and spintronic devices. This study demonstrates wide-range control of electrical and magnetic properties in high-quality SrRuO3 films through epitaxial strain. The results provide guidelines for designing SrRuO3-based heterostructures for device applications.
ACS APPLIED ELECTRONIC MATERIALS
(2021)
Article
Crystallography
Jianzheng Hu, Long Yan, Ning Zhou, Yao Chen, Xiaoni Yang, Lianqiao Yang, Shiping Guo
Summary: The effect and mechanism of carrier gas velocity, V/III ratio, and carrier gas velocity match on the growth rate of AlN were investigated in this study. The results showed that the growth rate of AlN initially increased with hydrogen flow rate, reached saturation, and then decreased monotonically. The turning point value depended on the equipment and process. By increasing the MO VM, the growth rate of AlN could be improved, but the uniformity deteriorated due to turbulence and loss of uniform boundary layer. High quality AlN films were successfully grown on nano-patterned sapphire substrates with improved crystalline quality and atomic smooth surfaces.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Tingting Ma, Yang Li, Kangning Sun, Qinglin Cheng, Sen Li
Summary: This study investigates the melting process and nucleation behavior of sodium crystals using molecular dynamics simulation. The results show good agreement between simulated and experimental values for the melting temperature, density, and radial distribution function of sodium. The diffusion coefficient of liquid sodium increases linearly with temperature, and the homogeneous nucleation rate of melting in superheated sodium crystal exponentially increases with temperature. The findings provide theoretical support for applications involving heat and mass transfer in sodium-related systems.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Hisato Nishii, Shintarou Iida, Akira Yamasaki, Takumi Ikenoue, Masao Miyake, Toshiya Doi, Tetsuji Hirato
Summary: Epitaxial V2O3 films were fabricated on sapphire substrates using mist chemical vapor deposition (mist CVD) method, eliminating the need for high vacuum conditions. The films can be grown on sapphire substrates even under atmospheric pressure, with the optimal growth temperature at 823 K. The films grown at 823 K exhibit a metal-insulator transition at approximately 155 K. The film on C-plane sapphire exhibits a lower transition temperature compared to those on R- and A-plane sapphire substrates.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Jani Jesenovec, Kevin Zawilski, Peter Alison, Stephan J. Meschter, Sambit K. Saha, Andrew J. Sepelak, Peter G. Schunemann
Summary: In this study, NiSb needles were successfully formed in InSb by manipulating the growth rate and adding NiSb. These needle structures in InSb can be used to tune the magnetoresistance of devices. Additionally, undoped InSb crystals demonstrated good infrared transmission at low growth rates.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
D. Joseph Daniel, P. Karuppasamy, H. J. Kim
Summary: The 2-amino 4-methyl pyridinium oxalate (2A4MPO) compound was synthesized and its crystal structure, functional groups, thermal stability, electrical properties, and third-order nonlinear optical properties were studied. The results demonstrate that the synthesized crystal has good structural integrity, thermal stability, and potential for third-order nonlinear optical applications.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
C. W. Lan
Summary: The past two decades have witnessed a significant transformation in solar silicon crystal growth, especially in the competition between multi-crystalline silicon (Multi-Si) and mono-crystalline silicon (Mono-Si). The demand for this crucial material has exponentially surged, with silicon solar panels capturing over 95% of the global PV market share. The advancements in crystal growth technology during this period have set historical benchmarks, with the market share shifting from high-performance multi-crystalline silicon (HPM-Si) to CZ silicon.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Peiyao Hao, Lili Zheng, Hui Zhang
Summary: A novel design of argon gas tube for removing impurities during silicon ingot growth was developed, and numerical simulations showed that it can effectively extract SiO.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Geetika Sahu, Chanchal Chakraborty, Subhadeep Roy, Souri Banerjee
Summary: This article discusses the novel fractal nature of hydrothermally synthesized MoS2 QDs. By adjusting the reaction time, the study found that the average size of QDs increases and then decreases with longer reaction times. STEM images indicate that shorter reaction times lead to sheet formation, while extended reaction times cause sheets to fragment into QDs.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Pengjian Lu, Wei Huang, Junjun Wang, Haitao Yang, Shiyue Guo, Bin Li, Ting Wang, Chitengfei Zhang, Rong Tu, Song Zhang
Summary: A systematic study on the tetramethylsilane-hydorgen (TMS-H-2) system for the deposition of pure single-crystal SiC by high-temperature chemical vapor deposition (HTCVD) method is conducted. The study investigates the effect of temperature, pressure, and H-2:TMS ratio on the deposition conditions and provides a theoretical basis and guidance for improving the quality and cost of industrial production of single-crystal SiC.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Xinyu Jiang, Liangliang Liu, Yanqing Liu, Yan Wang, Zhaoping Hou
Summary: Investigation on the preparation of anisometric templated textured high entropy or multi-element doped ferroelectric ceramics was conducted using A-site disordered niobate microcrystals. The effects of process parameters on the morphology and chemical composition were studied, and the photocatalytic properties of the microcrystals were evaluated.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Mobashsara Tabassum, Md. Ashraful Alam, Sabrina Mostofa, Raton Kumar Bishwas, Debasish Sarkar, Shirin Akter Jahan
Summary: In this study, high crystallinity copper nanoparticles were synthesized by altering the reaction medium at low temperatures. The results show that changing the reaction medium can reduce the surface energy of precursors and promote the formation of highly crystalline copper nanoparticles.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Ivan Bodnar, Vitaly V. Khoroshko, Veronika A. Yashchuk, Valery F. Gremenok, Mohsin Kazi, Mayeen U. Khandaker, Tatiana I. Zubar, Daria I. Tishkevich, Alex Trukhanov, Sergei Trukhanov
Summary: This work presents the production of single crystals of Cu2ZnGeSe4, a semiconducting quaternary compound, using a gas chemical method with iodine as a transporter. The phase state, crystal structure, and lattice constants of the synthesized samples were refined and determined. The band gap of Cu2ZnGeSe4 was calculated using transmission spectrum and it was found that the band gap increases by 12% with decreasing temperature in the range of 20-300 K.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Timur Malin, Igor Osinnykh, Vladimir Mansurov, Dmitriy Protasov, Sergey Ponomarev, Denis Milakhin, Konstantin Zhuravlev
Summary: The effect of growth temperature on the buffer leakage currents of GaN-on-Si layers was investigated. It was found that higher growth temperature results in lower leakage currents. The defects in GaN layers grown at different temperatures were studied using photoluminescence technique, and a correlation between leakage currents, structural perfection, and donor concentration in GaN-on-Si layers was established. It was also observed that reduced growth temperature leads to the formation of inversion domains.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Thi-Hoai-Thu Nguyen, Jyh-Chen Chen
Summary: The effect of heater power control on heat, flow, and oxygen transport for CCz crystal growth was studied. Shorter upper side heater design could improve crystal quality and growth, but with higher power consumption.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Peter Rudolph
Summary: This article presents an overview of selected contributions to the development of crystal growth technology by the Laudise Prize awardee 2023. It discusses various aspects such as shaped crystal growth, the correlation between melt structure and crystal quality, control of intrinsic defects and inclusions, prevention of dislocation cell patterns, and melt growth experiments under a travelling magnetic field.
JOURNAL OF CRYSTAL GROWTH
(2024)
