Article
Chemistry, Physical
J. F. Gomez-Cortes, V. Fuster, M. Perez-Cerrato, P. Lorenzo, I. Ruiz-Larrea, T. Breczewski, M. L. No, J. M. San Juan
Summary: This study compared the damping capacity of four copper-based SMAs, demonstrating that all four alloys possess intrinsic superelastic damping capacity and offer a wide range of loss factors. Additionally, a size effect on damping at the nanoscale was observed in the Cu-Al-Ni-Ga alloy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Maciej J. Winiarski
Summary: This study investigated the electronic structures of ternary alloys of group III and rare earth nitrides, revealing that the introduction of rare earth ions can affect the band gap width. The findings suggest potential applications of these materials, encouraging further experimental investigations.
Article
Materials Science, Multidisciplinary
Shuvankar Gupta, Jyotirmoy Sau, Manoranjan Kumar, Chandan Mazumdar
Summary: In this study, a new spin-gapless semiconductor material CoFeMnSn is reported, and its stable structure and spin-polarized band structure are determined through experimental realization and theoretical calculations. The compound exhibits a high ferromagnetic transition temperature, making it excellent for room temperature applications. The nearly temperature-independent resistivity, conductivity, and carrier concentration of the compound, adherence to the Slater-Pauling rule, and the high intrinsic anomalous Hall conductivity achieved through hole doping further confirm its spin-gapless semiconductor nature. Additionally, the compound's SGS and topological properties make it suitable for spintronics and magneto-electronics devices.
JOURNAL OF MATERIALS CHEMISTRY C
(2024)
Review
Materials Science, Multidisciplinary
Riaz Ahamed, Reza Ghomashchi, Zonghan Xie, Lei Chen
Summary: Ni-Mn-X Heusler alloys show multiferroic effects and have potential applications in actuation, magnetic refrigeration, and waste heat conversion. The magnetostructural coupling depends on alloy compositions and accurate characterization of crystal structures is crucial, with XRD, TEM, and DSC being important techniques for microstructural characterization.
CRITICAL REVIEWS IN SOLID STATE AND MATERIALS SCIENCES
(2021)
Article
Chemistry, Inorganic & Nuclear
Menghu Zhou, Yadong Gu, Binbin Ruan, Qingsong Yang, Genfu Chen, Zhian Ren
Summary: A novel quaternary selenide Cu6GeWSe8 has been synthesized from the constituent elements, showing semiconductor behavior with a direct band gap. The compound exhibits diamagnetism at room temperature and has a direct band gap, with Cu and Se atoms playing a dominant role in the energy bands and density of states.
JOURNAL OF SOLID STATE CHEMISTRY
(2021)
Article
Engineering, Electrical & Electronic
Kamal K. Jha, Mandar Jatkar, Pradyumna Athreya, M. P. Tejas, Sandeep Kumar Jain
Summary: This article investigates the electronic properties and structural stability of ZInNNR structures, as well as the effects of adsorption gases. The results show that bare ZInNNR structures have metallic characteristics, and bare-ZInNNR-6 and Pristine-6 structures are the most thermostatically stable. Among the adsorption gases, CO, CO2, NO, and NO2 show the highest energetically favorable configurations when adsorbed by ZInNNR-6.
IEEE SENSORS JOURNAL
(2023)
Article
Crystallography
Hongyu Lin, Hao Xie, Yan Sun, Shuhong Hu, Ning Dai
Summary: This paper presents the designing principles of InAs based pBin mid-infrared (MWIR) photodetectors grown by liquid phase epitaxy (LPE) based on the lattice mismatch. pBin MWIR detector structures with InAs, InAs0.94Sb0.06, and InAs0.89Sb0.11 absorbers were designed and grown by LPE, and then fabricated into mesa type detectors. The three kinds of detectors achieved detectivities higher than 1 x 109 cm Hz1/2 W-1, with the InAs absorber achieving a detectivity of 1.6 x 1010 cm Hz1/2 W-1 at 300 K, the highest ever reported, indicating good material qualities of the detectors.
JOURNAL OF CRYSTAL GROWTH
(2023)
Article
Materials Science, Multidisciplinary
Mohamed Amine Ghebouli, Brahim Ghebouli, Aldjia Zeghad, Tayeb Chihi, Messaoud Fatmi, Sameh Ibrahim Ahmed
Summary: The study focused on the structural, elastic, electronic, dynamic, and optical properties of scandium and yttrium nitrides in the zinc blend structure, utilizing various computational approaches. Results indicated that ScN and YN exhibit elastic stability and ductility in the zinc blend structure, with isotropic linear compressibility and anisotropic mechanical properties.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Chemistry, Physical
A. K. Tan, N. A. Hamzah, M. A. Ahmad, S. S. Ng, Z. Hassan
Summary: In this study, InGaN/GaN heterostructures were grown on a flat sapphire substrate using MOCVD technique. Results showed that a higher V/III ratio led to parasitic behavior by hydrogen dissociated from ammonia, which etched the InN and changed the growth morphology. Moreover, the InGaN thin films grown at higher V/III ratios exhibited more stable bandgap energy and improved electrical properties. The correlation between strain and carrier density was also discussed, and it was concluded that high-quality and thick InGaN thin films could be grown for solar cell applications at higher V/III ratio conditions.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Devarajan Alagarasan, S. Varadharajaperumal, K. Deva Arun Kumar, R. Naik, Sima Umrao, Mohd Shkir, S. AIFaify, R. Ganesan
Summary: SnS thin films were deposited on glass substrates at different temperatures using vacuum thermal evaporation, and their structural, electrical, and optical properties were studied. The films exhibited orthorhombic crystal structure, with optical properties improving with increasing substrate temperature. The optical band gap values ranged from 1.843 to 2.075 eV, and the visible photoresponsivity and specific detectivity of the films increased with higher substrate temperatures.
Article
Chemistry, Physical
Shijun Qian, Ruizhi Qiu, Jun Tang, Jinfan Chen, Pengchuang Liu, Bingyun Ao
Summary: A systematic first-principles calculation was conducted on the behavior of U binary, ternary, and quaternary tellurides, focusing on the quantum-mechanical oxidation state of U ions and its correlation with structure and composition. The highest quantum oxidation state of U ions in tellurides was found to be U4+ instead of the formally highest valent U6+ under ionic limitations.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Engineering, Environmental
Shihai You, Shuxing Li, Le Wang, Takashi Takeda, Naoto Hirosaki, Rong-Jun Xie
Summary: The study successfully addressed the thermal stability challenge in high-power solid-state lighting devices by designing a novel ternary solid solution phosphor CALSON:Ce, which exhibited excellent photoluminescence properties and thermal stability. This work suggests that creating multi-component solid solutions is an effective strategy for designing novel phosphors.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Materials Science, Multidisciplinary
A. Dehyar, G. Rezaei, B. Vaseghi, H. Nakhaei Motlagh, H. A. Mardanifard
Summary: Using Monte Carlo simulation, the magnetic properties and magnetocaloric effects of a two-dimensional body-centered hexagonal structure with mixed spin were studied. Concentration and external magnetic field were found to play crucial roles in determining the properties of the ternary alloys, with the compound A(0.2)(B0.4C0.6)(0.8) showing the highest cooling efficiency.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
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
Materials Science, Multidisciplinary
T. Yang, Y. Liu, Z. Wu, X. Wang, G. Zhang
Summary: This study presents a realistic material PrSbPt with hexagonal crystal structure, exhibiting different topological dimensions, including the rare Type-II nodal ring and critical type Dirac points.
MATERIALS TODAY PHYSICS
(2021)
Article
Multidisciplinary Sciences
Lucja Marona, Dario Schiavon, Michal Baranowski, Robert Kudrawiec, Iza Gorczyca, Anna Kafar, Piotr Perlin
SCIENTIFIC REPORTS
(2020)
Article
Optics
A. Kafar, R. Ishii, K. Gibasiewicz, Y. Matsuda, S. Stanczyk, D. Schiavon, S. Grzanka, M. Tano, A. Sakaki, T. Suski, P. Perlin, M. Funato, Y. Kawakami
Article
Optics
Krzysztof Gibasiewicz, Agata Bojarska-Cieslinska, Grzegorz Muziol, Czeslaw Skierbiszewski, Szymon Grzanka, Anna Kafar, Piotr Perlin, Stephen Najda, Tadeusz Suski
Article
Optics
Mikolaj Chlipala, Henryk Turski, Marcin Siekacz, Katarzyna Pieniak, Krzesimir Nowakowski-Szkudlarek, Tadeusz Suski, Czeslaw Skierbiszewski
Article
Optics
K. Pieniak, M. Chlipala, H. Turski, W. Trzeciakowski, G. Muziol, G. Staszczak, A. Kafar, I Makarowa, E. Grzanka, S. Grzanka, C. Skierbiszewski, T. Suski
Summary: This study investigates the impact of injected current on the screening of the built-in electric field in LEDs, revealing that in LEDs with narrow quantum wells, a large portion of built-in field remains even at high injection currents, while in LEDs with wide quantum wells, the electric field is fully screened even at the lowest currents.
Article
Optics
A. Kafar, A. Sakaki, R. Ishii, S. Stanczyk, K. Gibasiewicz, Y. Matsuda, D. Schiavon, S. Grzanka, T. Suski, P. Perlin, M. Funato, Y. Kawakami
Summary: The study demonstrates the modification of epitaxial laser-like or superluminescent diode-like structures by intentional changes in substrate misorientation, affecting the indium content in the quantum well and photoluminescence emission wavelength. Simulation results show that good light guiding properties should be preserved within the studied misorientation range.
PHOTONICS RESEARCH
(2021)
Article
Physics, Condensed Matter
S. P. Lepkowski, Abdur-Rehman Anwar
Summary: In this study, the second-order and third-order elastic constants of wurtzite AlN, GaN, and InN were determined using hybrid-density functional theory calculations. It was found that the strain-energy method is more stable than the strain-stress approach. Additionally, the biaxial relaxation coefficient of these materials under biaxial stress was investigated, showing behaviors that cannot be modeled by linear elasticity theory.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Physics, Multidisciplinary
S. P. Lepkowski, Abdur-Rehman Anwar
Summary: We applied the third-order elasticity theory to study the biaxial relaxation coefficient in III nitride quantum wells and thin films. The results showed that the coefficient largely depends on the in-plane strain arising from the lattice misfit between the strained layers and the substrates. In most cases, the R-B coefficient in quantum wells and thin films made of InxGa1-xN and AlxGa1-xN alloys significantly depends on the in-plane strain, and the discrepancies between the results obtained using third-order elasticity and linear elasticity are proportional to the magnitude of the in-plane strain. However, for certain systems, such as AlxGa1-xN quantum wells on AlN substrates and InxGa1-xN thin films on InN substrates, the discrepancies are not proportional to the in-plane strain.
ACTA PHYSICA POLONICA A
(2022)
Review
Optics
Abdur Rehman Anwar, Muhammad T. Sajjad, Muhammad Ali Johar, Carlos A. Hernandez-Gutierrez, Muhammad Usman, S. P. Lepkowski
Summary: The demand for high-performance displays is increasing due to their wide applications. Micro-LED display shows potential to replace traditional displays, but faces challenges in mass transfer and manufacturing cost. Another option is using color conversion medium for full-color display.
LASER & PHOTONICS REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Slawomir P. Lepkowski, Abdur Rehman Anwar
Summary: By studying the phase transitions and properties of topological insulators in InGaN/GaN and InN/InGaN double quantum wells, we show that topological insulators can be obtained under certain conditions. The size of the energy gap in the topological insulator phase varies in different structures. These findings provide important guidance for achieving topological insulators in InGaN-based nanostructures in the future.
Editorial Material
Chemistry, Multidisciplinary
Slawomir P. Lepkowski
Proceedings Paper
Computer Science, Artificial Intelligence
S. P. Najda, P. Perlin, T. Suski, S. Stanczyk, M. Leszczynski, D. Schiavon, T. Slight, S. Gwyn, S. Watson, A. E. Kelly, M. Knapp, M. Haji
SPIE FUTURE SENSING TECHNOLOGIES (2020)
(2020)
Correction
Physics, Condensed Matter
Slawomir P. Lepkowski, Witold Bardyszewski
JOURNAL OF PHYSICS-CONDENSED MATTER
(2020)
Article
Materials Science, Multidisciplinary
S. P. Lepkowski
Article
Materials Science, Multidisciplinary
I Gorczyca, M. Wierzbowska, I. D. Jarosz, J. Z. Domagala, A. Reszka, D. Le Si Dang, F. Donatini, N. E. Christensen, H. Teisseyre