Article
Chemistry, Physical
Tatyana B. Bekker, Alexey A. Ryadun, Alexey V. Davydov, Vladimir P. Solntsev, Veronika D. Grigorieva
Summary: Single crystals of undoped and rare-earth-doped Ba-12(BO3)(6)[BO3][LiF4] were grown from high-temperature solutions. The luminescence of these crystals at specific excitation wavelengths shows potential for converting LED emissions into white light.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Multidisciplinary Sciences
Linyang Li, Fangyun Lu, Wenqi Xiong, Yu Ding, Yangyi Lu, Yao Xiao, Xin Tong, Yao Wang, Shuangfeng Jia, Jianbo Wang, Rafael G. Mendes, Mark H. Ruemmeli, Shengjun Yuan, Mengqi Zeng, Lei Fu
Summary: We have successfully synthesized high-quality 2D rare-earth oxide (REO) single crystals with tailorable facets by designing a hard-soft-acid-base couple to control the orientation growth and crystal facets. This breakthrough provides a foundation for investigating facet-dependent properties and exploring various applications of 2D REO.
NATIONAL SCIENCE REVIEW
(2022)
Article
Chemistry, Physical
J. A. Sarmiento Vanegas, J. A. Cuervo Farfan, C. E. Deluque Toro, D. A. Landinez Tellez, J. Roa-Rojas
Summary: This work reports the synthesis and characterization of SmFe0.5Co0.5O3 material, including its crystallographic, optical, electrical, and magnetic properties. The material exhibits an orthorhombic crystal structure with a disordered distribution of Fe and Co cations. It shows a bandgap of Eg = 1.0 eV, typical of semiconductor materials, and exhibits antiferromagnetic behavior at low temperatures with weak ferromagnetic response.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Review
Chemistry, Applied
Saehwa Chong, Brian J. Riley, Zayne J. Nelson
Summary: This study summarizes the crystal structures and synthesis methods of six RE-containing compounds used for immobilizing RE fission products. It provides an overview of their applications and compares structural parameters across different REs in each compound.
JOURNAL OF RARE EARTHS
(2022)
Article
Chemistry, Applied
Binbin Jiang, Lihe Zheng, Dapeng Jiang, Handi Yin, Jiangang Zheng, Qiuhong Yang, Guofeng Cheng, Liangbi Su
Summary: Ytterbium and rare earth ions codoped CaF2-SrF2 single crystals were fabricated and their optical properties were analyzed, showing potential applications in high-power solid-state lasers. The study confirmed the effects of different rare earth ions on the crystal structure and optical performance.
JOURNAL OF RARE EARTHS
(2021)
Review
Chemistry, Multidisciplinary
Zhihong Zhang, Xiaonan Yang, Kaihui Liu, Rongming Wang
Summary: Two-dimensional (2D) materials with special crystal structure exhibit unique properties, making them promising in fields such as electronics and optoelectronics. To realize their applications, especially in integrated devices, the growth of large-size single crystals is necessary. Epitaxy, specifically the growth of 2D materials with specific orientations on single-crystal substrates, is the most feasible way to achieve this. The lattice symmetry relation and interaction between 2D materials and the substrate determine the epitaxy behaviors, which are systematically discussed in this article. Opportunities and challenges for the epitaxy of 2D single crystals in the future are summarized.
Article
Chemistry, Physical
Koki Kinami, Yuji Hanada, Masanori Nagao, Akira Miura, Shigeto Hirai, Yuki Maruyama, Satoshi Watauchi, Isao Tanaka
Summary: Sm(O,F)BiS2 superconducting single crystals with various nominal F contents were successfully grown using KI-KCl flux, with a solid solution limit of F at the O-site of less than 20 at%. Despite similar F concentration and c-axis lattice constants, the F concentrations in the single crystals were hardly controlled by nominal F contents, suggesting the presence of an intrinsic stable phase. The superconducting transition temperature increased with increasing nominal F contents within less than 70 at% in the O-site.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Crystallography
Bhakti K. Patel, Mudithangani T. K. Kolambage, Colin D. McMillen, Joseph W. Kolis
Summary: A series of lanthanide ruthenates with different oxidation states of ruthenium were synthesized as large single crystals by a high temperature hydrothermal method. The starting materials were lanthanide sesquioxides (Ln2O3) and RuO2, with their ratio determining the final products such as LnRuO3, Ln2Ru2O7, Ln2RuO5(OH), and Ln5Ru2O12. The majority of the products were obtained as high-quality single crystals with good yield. This method allows for the advanced physical properties measurements of perovskite and pyrochlore structure types. The study also introduces new structure types for Ru5+ (Ln2RuO5(OH)) and expands the phase space for Ln5Ru2O12 to later lanthanides, all in well-formed single crystals. Careful analyses of diffraction data indicate minimal site disorder or nonstoichiometry in these materials.
JOURNAL OF CRYSTAL GROWTH
(2023)
Article
Physics, Multidisciplinary
Rui Wang, Lipeng Hou, Puyuan Shi, Qianshuai Cheng, Yungeng Zhang
Summary: Two rare-earth monolayers, GdScSi and GdScGe, were predicted to exhibit ferromagnetic orders with large magnetic moments. Monte Carlo simulations predicted high Curie temperatures for these two materials. Additionally, they showed dynamical, mechanical, and thermal stabilities, making them promising candidates for spintronic applications.
FRONTIERS IN PHYSICS
(2023)
Article
Chemistry, Physical
Sudip Acharya, Krishna Pandey, Rabindra Basnet, Gokul Acharya, Md Rafique Un Nabi, Jian Wang, Jin Hu
Summary: In this work, the single crystal growth method for ZrSnTe has been improved through a solid-state reaction process. The quality of the obtained single crystals has been verified through various characterizations. This study is of great significance for further exploring the less explored topological semimetal ZrSnTe.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Mattes Holsten, Sven M. Elbert, Frank Rominger, Wen-Shan Zhang, Rasmus R. Schroeder, Michael Mastalerz
Summary: Porous organic cages are an important class of materials, with some being soluble while others are amorphous. This study synthesized single-crystalline materials of larger salicylimine cages, providing insights into their crystal packing and gas-sorption properties.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Georg Poelchen, Igor P. Rusinov, Susanne Schulz, Monika Guttler, Max Mende, Alexander Generalov, Dmitry Yu Usachov, Steffen Danzenbaecher, Johannes Hellwig, Marius Peters, Kristin Kliemt, Yuri Kucherenko, Victor N. Antonov, Clemens Laubschat, Evgueni Chulkov, Arthur Ernst, Kurt Kummer, Cornelius Krellner, Denis V. Vyalikh
Summary: The temperature scales at the surfaces of strongly correlated materials have attracted research attention. A two-dimensional Ce Kondo lattice is observed below the surface of the antiferromagnet CeCo2P2. The Ce 4f states become partially occupied and spin-polarized near the surface, interacting strongly with surface states. This study demonstrates the rich and diverse f-driven properties at the surface of materials without f-physics in the bulk.
Article
Chemistry, Physical
P. Opletal, E. Duverger-Nedellec, K. Miliyanchuk, S. Malick, Z. Hossain, J. Custers
Summary: The crystal structure and magnetic properties of a new ternary compound Ce3Rh4Sn7 were studied through synthesis and measurements. The compound crystallizes in a monoclinic structure and exhibits interesting magnetic behavior, with Ce2 ion in a nonmagnetic state and the other Ce sites in a trivalent state, resulting in antiferromagnetic ordering at low temperatures.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Applied
K. D. Martinson, I. S. Kondrashkova, M. I. Chebanenko, A. S. Kiselev, T. Yu Kiseleva, V. I. Popkov
Summary: Nanostructured HoFeO3 powders were synthesized by solution combustion method with different glycine-nitrate ratios. Two crystal structures, orthorhombic and hexagonal, were identified in the synthesized samples. The magnetic structure of HoFeO3 was found to be magnetically ordered in the presence of stoichiometric glycine. The size of the obtained compositions varied with the G/N ratio. The orthoferrites exhibited a ferromagnetic structure, and their magnetic parameters changed systematically with the redox ratio of the reaction mixture.
JOURNAL OF RARE EARTHS
(2022)
Article
Chemistry, Multidisciplinary
Cosme G. Ayani, Michele Pisarra, Ivan M. Ibarburu, Manuela Garnica, Rodolfo Miranda, Fabian Calleja, Fernando Martin, Amadeo L. Vazquez de Parga
Summary: This study reports the realization of a 2D Kondo lattice by stacking a single-layer Mott insulator on a metallic surface. The results show that below 27 K, the Kondo screening of localized electrons in the Mott insulator occurs, leading to the formation of a Kondo lattice extended to the entire sample. The electronic properties and temperature dependence of the system are explained using density functional theory.
Article
Chemistry, Multidisciplinary
Georg Poelchen, Igor P. Rusinov, Susanne Schulz, Monika Guttler, Max Mende, Alexander Generalov, Dmitry Yu Usachov, Steffen Danzenbaecher, Johannes Hellwig, Marius Peters, Kristin Kliemt, Yuri Kucherenko, Victor N. Antonov, Clemens Laubschat, Evgueni Chulkov, Arthur Ernst, Kurt Kummer, Cornelius Krellner, Denis V. Vyalikh
Summary: The temperature scales at the surfaces of strongly correlated materials have attracted research attention. A two-dimensional Ce Kondo lattice is observed below the surface of the antiferromagnet CeCo2P2. The Ce 4f states become partially occupied and spin-polarized near the surface, interacting strongly with surface states. This study demonstrates the rich and diverse f-driven properties at the surface of materials without f-physics in the bulk.
Article
Nanoscience & Nanotechnology
Max Mende, Khadiza Ali, Georg Poelchen, Susanne Schulz, Vladislav Mandic, Artem V. Tarasov, Craig Polley, Alexander Generalov, Alexander V. Fedorov, Monika Guttler, Clemens Laubschat, Kristin Kliemt, Yury M. Koroteev, Evgueni V. Chulkov, Kurt Kummer, Cornelius Krellner, Dmitry Yu. Usachov, Denis V. Vyalikh
Summary: The study reveals the existence of novel temperature scales and distinct electronic structures at the surfaces of strongly correlated f materials, indicating the potential for engineering novel nanostructural objects with diverse functionalities. Ab initio calculations can reliably predict the unusual electronic and spin structures of these surfaces, offering new insights for materials science research and development of advanced materials.
ADVANCED ELECTRONIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
K. Kliemt, J. D. Reusch, M. Bolte, C. Krellner
Summary: This article investigates the relationship between crystal structure and magnetic properties in tetragonal compounds LnIr(2)Si(2) (Ln = lanthanoid). By growing single crystals and characterizing their magnetic properties, it is found that compounds with different symmetries exhibit significant differences in magnetic behavior.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Chemistry, Physical
Y. W. Windsor, S-E Lee, D. Zahn, V Borisov, D. Thonig, K. Kliemt, A. Ernst, C. Schuessler-Langeheine, N. Pontius, U. Staub, C. Krellner, D. V. Vyalikh, O. Eriksson, L. Rettig
Summary: This study investigates the magnetization dynamics in 4f antiferromagnets and shows that the rate of direct transfer between opposing moments is directly determined by the magnitude of the Ruderman-Kittel-Kasuya-Yosida (RKKY) coupling energy. The results offer a useful approach for fine tuning the speed of magnetic devices.
Article
Chemistry, Physical
Artem V. Tarasov, Max Mende, Khadiza Ali, Georg Poelchen, Susanne Schulz, Oleg Yu. Vilkov, Kirill A. Bokai, Matthias Muntwiler, Vladislav Mandic, Clemens Laubschat, Kristin Kliemt, Cornelius Krellner, Denis V. Vyalikh, Dmitry Yu. Usachov
Summary: By studying the surface reconstruction phenomenon of the heavyfermion superconductor CeIrIn5, we found that the electronic structure and related properties of the In surface differ significantly from the unreconstructed case, and the predicted surface states were not observed. This suggests the existence of surface instabilities in similar materials, which can be revealed by diffraction techniques.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Kristin Kliemt, Marius Peters, Isabel Reiser, Michelle Ocker, Franziska Walther, Doan-My Tran, Eunhyung Cho, Michael Merz, Amir Abbas Haghighirad, Dominik C. Hezel, Franz Ritter, Cornelius Krellner
Summary: This study investigated the single crystal growth, chemical and structural characterization, and physical properties of intermediate valent EuPd2Si2. The experiments revealed a slight variation in the Si-Pd ratio along the growth direction and confirmed the existence of a finite homogeneity range. The physical characterization demonstrated a strong coupling between structural and physical properties, explaining the different reported values of the valence transition temperature.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Chemistry, Physical
Dmitry Yu. Usachov, Daria Glazkova, Artem V. Tarasov, Susanne Schulz, Georg Poelchen, Kirill A. Bokai, Oleg Yu. Vilkov, Pavel Dudin, Kurt Kummer, Kristin Kliemt, Cornelius Krellner, Denis V. Vyalikh
Summary: To efficiently utilize the magnetic functionalities in novel lanthanides-based materials, it is necessary to probe the atomic-layer resolved magnetic properties using complementary methods. This study demonstrates that 4f photoelectron spectroscopy is highly sensitive to the collective orientation of 4f magnetic moments and can be a powerful tool for characterizing related properties. The systematic study on a family of layered crystalline 4f-materials reveals that the 4f moments at the surfaces experience a strong reorientation due to changes in the crystal-electric field. Hence, this research is of great importance for efficient control of magnetic properties in layered 4f-systems.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Physics, Multidisciplinary
J. Knapp, L. Levitin, J. Nyeki, A. F. Ho, B. Cowan, J. Saunders, M. Brando, C. Geibel, K. Kliemt, C. Krellner
Summary: The nature of the antiferromagnetic order, quantum criticality, and superconductivity in YbRh2Si2 remain unknown. We measured the heat capacity over a wide temperature range using current sensing noise thermometry and observed a sharp anomaly at 1.5 mK, which is identified as an electronuclear transition into a state with spatially modulated electronic magnetic order. Magnetic field measurements show the eventual suppression of this order, demonstrating the coexistence of a large moment antiferromagnet with possible superconductivity.
PHYSICAL REVIEW LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Marius Peters, Kristin Kliemt, Michelle Ocker, Bernd Wolf, Pascal Puphal, Matthieu Le Tacon, Michael Merz, Michael Lang, Cornelius Krellner
Summary: EuPd2Si2 undergoes a temperature-induced valence crossover at T-V' approximately 160 K. Single crystals of EuPd2(Si1-xGex)(2) with substitution levels x <= 0.15 were successfully grown using the Czochralski method. The determination of germanium content shows that only half of the nominal concentration is incorporated into the crystal structure. Thermodynamic measurements reveal that T-V' is strongly suppressed for small substitution levels and antiferromagnetic order emerges for x >= 0.10.
PHYSICAL REVIEW MATERIALS
(2023)
Article
Physics, Multidisciplinary
Chia-Jung Yang, Kristin Kliemt, Cornelius Krellner, Johann Kroha, Manfred Fiebig, Shovon Pal
Summary: Using terahertz time-domain spectroscopy, evidence for fermionic critical slowing down in YbRh2Si2 close to a quantum phase transition is found. The heavy-fermion quasiparticles in the heavy-Fermi-liquid state break down at the transition, as indicated by measurements of critical slowing down. This breakdown of heavy-fermion quasiparticles near the quantum phase transition could classify this system among a wider family of fermionic quantum phase transitions that is yet to be fully explored.
Article
Multidisciplinary Sciences
G. Poelchen, J. Hellwig, M. Peters, D. Yu. Usachov, K. Kliemt, C. Laubschat, P. M. Echenique, E. V. Chulkov, C. Krellner, S. S. P. Parkin, D. V. Vyalikh, A. Ernst, K. Kummer
Summary: The metallic antiferromagnet CeCo2P2 exhibits long-lived spin-waves at terahertz frequencies, suggesting the potential use of metallic antiferromagnets for spin-wave information processing.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Bernd Wolf, Theresa Lundbeck, Jan Zimmermann, Marius Peters, Kristin Kliemt, Cornelius Krellner, Michael Lang
Summary: In this study, the magnetic susceptibility of high-quality single crystals of EuPd2(Si1-xGex)2 with Ge concentrations 0 ≤ x ≤ 0.105 was measured under varying hydrostatic pressure (He-gas) of 0 to 0.5 GPa. The results reveal that the magnetic response changes drastically from valence-crossover behavior to long-range antiferromagnetic order as the Ge concentration increases to x = 0.105. The valence-crossover temperature shows a strong pressure dependence, while the pressure dependence of the antiferromagnetic order is small.
Article
Materials Science, Multidisciplinary
Mai Ye, Mark Joachim Graf von Westarp, Sofia-Michaela Souliou, Marius Peters, Robert Moeller, Kristin Kliemt, Michael Merz, Rolf Heid, Cornelius Krellner, Matthieu Le Tacon
Summary: The valence crossover and strong electron-phonon coupling of EuPd2Si2 were studied using polarization-resolved Raman spectroscopy. The fully symmetric phonon mode exhibited a strongly asymmetric line shape at low temperature, indicating Fano-type interaction with a continuum of electron-hole excitations. Additionally, anomalies in the frequency and linewidth of the phonon modes were observed across the valence-crossover temperature, suggesting coupling between valence fluctuations and lattice vibration. Density-functional-theory calculations were used to evaluate the relative contribution of structural change and valence change to the phonon anomalies.
Article
Materials Science, Multidisciplinary
Young -Joon Song, Susanne Schulz, Kristin Kliemt, Cornelius Krellner, Roser Valenti
Summary: We investigate the mechanism of the valence transition from nearly divalent to nearly trivalent Eu in tetragonal EuPd2Si2 under volume compression by ab initio DFT calculations. Enhanced c-f hybridization and electronic charge redistribution are observed near the valence transition, which is closely related to the volume reduction and the delicate balance between various factors. Comparison with photoemission data confirms the mixed-valent properties of EuPd2Si2 and highlights the limitations of DFT in describing valence transitions.
Article
Quantum Science & Technology
Tobias Biesner, Seulki Roh, Aleksandar Razpopov, Jannis Willwater, Stefan Suellow, Ying Li, Katharina M. Zoch, Marisa Medarde, Juergen Nuss, Denis Gorbunov, Yurii Skourski, Andrej Pustogow, Stuart E. Brown, Cornelius Krellner, Roser Valenti, Pascal Puphal, Martin Dressel
Summary: The spin density of states (SDOS) can be accessed over the entire Brillouin zone in the distorted kagome quantum magnet Y-kapellasite through three-center magnon excitations. This provides a new aspect to probe magnetism in matter, relaxing the conventional zone-center constraint of photons.
ADVANCED QUANTUM TECHNOLOGIES
(2022)
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)
