Article
Materials Science, Ceramics
Zhifang Zhou, Yunpeng Zheng, Yueyang Yang, Wenyu Zhang, Bin Wei, Mingchu Zou, Jinle Lan, Ce-Wen Nan, Yuan-Hua Lin
Summary: This study demonstrated that more zinc oxide-gallium-doped zinc oxide (ZnO-GZO) interfaces can improve carrier transport and enhance the thermoelectric performance, resulting in an improved power factor value of 439 mu W m(-1) K-2 at 623 K. The analysis of weighted mobility provided insights into the beneficial effects of multiple interfaces on electrical transport performance, paving the way for further optimization of thermoelectric performance.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Biochemistry & Molecular Biology
Yu Yao, Dandan Sang, Liangrui Zou, Dong Zhang, Qingru Wang, Xueting Wang, Liying Wang, Jie Yin, Jianchao Fan, Qinglin Wang
Summary: The hydrothermal approach was used to fabricate a heterojunction of n-Al:ZnO nanorods/p-BDD, which showed increased photoluminescence intensity and a blue shift of the UV emission peak compared to the n-ZnO NRs/p-BDD heterojunction.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Chemistry, Multidisciplinary
Qinglin Wang, Yu Yao, Xianhe Sang, Liangrui Zou, Shunhao Ge, Xueting Wang, Dong Zhang, Qingru Wang, Huawei Zhou, Jianchao Fan, Dandan Sang
Summary: The n-type Ce:ZnO (NL)/p-type BDD heterojunction prepared using hydrothermal method shows enhanced photoluminescence intensity and blue shift of the UV emission peak compared with the undoped heterojunction. The heterojunction devices exhibit good thermal stability and rectification characteristics at different temperatures.
Article
Materials Science, Ceramics
Roman Yatskiv, Jan Grym, Sarka Kucerova, Stanislav Tiagulskyi, Ondrej Cernohorsky, Nikola Basinova, Jozef Vesely
Summary: This paper examines the effects of annealing atmosphere and temperature on defect-related emission in ZnO thin films and bulk substrates. The results demonstrate that post-annealing treatment is a powerful tool for modifying defects in ZnO and accurately tailoring emission wavelength. This research has significant implications in optoelectronics, particularly in LED, display, and biological labeling technologies.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Jhonatan Martinez, Edgar Mosquera-Vargas, Victor Fuenzalida, Marcos Flores, Gilberto Bolanos, Jesus Diosa
Summary: Thin films of BiFeO3, VO2, and BiFeO3/VO2 were grown on monocrystalline substrates, and their surface characteristics were studied using various techniques. The films exhibited good adhesion, homogeneous ordering, and low roughness, indicating a good coupling between the materials. The films also showed potential for applications such as resistive memories and solar cells.
Article
Chemistry, Multidisciplinary
Bhubesh Chander Joshi, Aadarsh Kumar Chaudhri
Summary: In this study, Cu-doped ZnO thin films were prepared using the sol-gel method. The doping concentration was found to affect the crystallite size, band gap, and conductivity of the films. The doped films showed p-type conductivity initially but degraded with time. Ambient-exposed films converted to n-type, while vacuum-placed films maintained p-type behavior. It is suggested that if these films are well prepared, protected, and properly passivated, they can be used for optoelectronics devices.
Article
Chemistry, Physical
Ting-Chun Chang, Chen-Yi Liao, Ching-Ting Lee, Hsin-Ying Lee
Summary: In this study, 30 nm thick PC61BM ETLs with different concentrations were modeled, and a concentration of 50 mg/mL showed optimal performance in PSCs. To address the issue of fine cracks on the PC61BM surface, a ZnO interface layer was introduced to fill the cracks and act as a hole-blocking layer, leading to an improved PCE of 14.62%.
Article
Engineering, Electrical & Electronic
Yu Shi, Quan-Guo Liu, Yong Chen, Mao-Hua Wang
Summary: In this study, rod-like (Bi, Co) co-doped ZnO powders were synthesized by refluxing method, and the effect of reaction time on its structure and optical properties was explored. The results showed that increasing the reaction time improved the crystal quality and resulted in a uniform rod-like structure. The feasibility of direct synthesis of doped ZnO powders for varistor ceramics by refluxing method was demonstrated.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Inorganic & Nuclear
D. Q. Trung, N. V. Quang, M. T. Tran, N. V. Du, N. Tu, N. D. Hung, Dao Xuan Viet, D. D. Anh, P. T. Huy
Summary: A novel broad-band-emitting phosphor based on Al-doped ZnO was reported, showing full spectrum emission with promising potential for UV-pump warm white light-emitting diodes.
DALTON TRANSACTIONS
(2021)
Article
Physics, Applied
Shangyi Chen, Mark Lust, Nima Ghalichechian
Summary: This paper presents an antenna-coupled non-linear vanadium dioxide (VO2) microbolometer that operates in the non-linear metal-insulator transition (MIT) region with an ultra-high responsivity. The paper demonstrates the high sensitivity of the fabricated sensor and its potential application in mmWave sensing and imaging.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Applied
Feng Chen, Zengliang Shi, Jinping Chen, Qiannan Cui, Aoqun Jian, Yizhi Zhu, Qingyu Xu, Zhidong Lou, Chunxiang Xu
Summary: This study investigates the negative photoconductivity dynamics of CH3NH3PbBr3-ZnO heterostructure, providing insights into the carrier transport properties and potential applications in constructing perovskite heterostructure memory and optical switching devices.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Mondher Rtimi, Nour Beydoun, Artur Movsesyan, Suzanna Akil, Sergei Kostcheev, Xavier Gassmann, Mohamed Lajnef, Radhouane Chtourou, Safi Jradi
Summary: In this study, a hybrid plasmonic/semiconductor material was fabricated by combining the chemical bath deposition of zinc oxide nanowires (ZnONWs) with the physical vapor deposition of aluminum nanostructures (AlNSs). The morphological and optical properties of the hybrid material fabricated at different temperatures and thicknesses were investigated. By adjusting the deposition and annealing parameters, the size distribution of the aluminum nanostructures could be tuned, leading to enhanced photoluminescence response and photocatalytic activity.
Article
Physics, Applied
T. Kasuya, K. Shima, S. F. Chichibu
Summary: Controlled thinning of wide bandgap semiconductors using CMP and/or RIE is a versatile method for optoelectronic applications. The influences of CMP, wet chemical etching, and RIE on the photoluminescence lifetime of ZnO single crystals were examined. CMP caused the generation of midgap recombination centers, while etching with HCl solution helped regain the lifetime to some extent. RIE had less significant impact on the lifetime, with higher plasma power allowing for longer lifetime due to the presence of attenuating oxide films containing Si.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Vidhi Dhokiya, V. S. Vadgama, Himanshu Dadhich, Bharavi Hirpara, Hardika Goswami, D. Venkateshwarlu, A. D. Joshi, R. Venkatesh, V Ganesan, P. S. Solanki, N. A. Shah
Summary: The study found that ZnO admixing does not significantly alter the lattice parameters of LCMO, but does affect its crystallinity and peak intensity. Electrical transport behaviors of the samples vary with different ZnO contents, and there is a discrepancy in resistivity values at ZnO contents of x = 0.10 and 0.20.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Crystallography
Zhifang Zhou, Yunpeng Zheng, Yueyang Yang, Wenyu Zhang, Mingchu Zou, Ce-Wen Nan, Yuan-Hua Lin
Summary: The thermoelectric properties of GZO films were further improved by designing GZO/NAZO multilayer films, which increased the carrier concentration, improved electrical conductivity, and maintained a high Seebeck coefficient through interface engineering. This work provides a paradigm for optimizing the thermoelectric performance of oxide films and other thermoelectric systems.
Article
Physics, Applied
Manasi Mandal, Chandan Patra, Anshu Kataria, Suvodeep Paul, Surajit Saha, R. P. Singh
Summary: This work presents the discovery of superconductivity in Ir-doped Weyl semimetal T-d-MoTe2 with broken inversion symmetry. The observation of chiral anomaly induced planar Hall effect and anisotropic magneto-resistance confirms the topological semimetallic nature of Mo1-xIrxTe2. The weak anisotropic, moderately coupled type-II superconductivity observed in T-d-Mo1-xIrxTe2 makes it a promising candidate for topological superconductor.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Bommareddy Poojitha, Aswin Shaji, Shalini Badola, Surajit Saha
Summary: Coupling of material properties in spinel structures, such as CoMn2O4, provides new possibilities for multifunctional devices. This study investigates the structural, magnetic, and vibrational properties of CoMn2O4 and reveals interesting phenomena related to spin-phonon coupling.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Editorial Material
Physics, Applied
T. Venkatesan, Stan Williams
APPLIED PHYSICS REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Su-in Yi, Santi Prasad Rath, T. Deepak, T. Venkatesan, Navakanta Bhat, Sreebrata Goswami, R. Stanley Williams, Sreetosh Goswami
Summary: A reliable and robust platform for in-memory computing using molecular materials is realized through the use of molecular switching elements with multiple non-monotonic and deterministic transitions. Experimental demonstrations and simulations show the potential of molecular materials in terms of reducing device count and computational steps, and achieving high reliability and performance in memory computing.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Anil Annadi, Murtaza Bohra, Vidyadhar Singh
Summary: Engineering the electronic properties of VO2 allows for the design of various electronic devices operating with low voltage. The study investigates the electrical and structural properties of sputter deposited VO2 thin films on SiO2/Si substrates. The results show that the insulator to metal transition can still occur at a film thickness of 23 nm in polycrystalline VO2 films. The research demonstrates the importance of morphological and structural growth dynamics in the modulation of the transition.
Article
Chemistry, Multidisciplinary
Zhaoting Zhang, Hong Yan, Zhen Huang, Xiao Chi, Changjian Li, Zhi Shiuh Lim, Shengwei Zeng, Kun Han, Ganesh Ji Omar, Kexin Jin, Ariando Ariando
Summary: The magnetic properties of epitaxial double-perovskite Sr2FeReO6 films can be tuned by adjusting the deposition pressure of oxygen and lattice mismatch. Epitaxial strain modulates B-site ordering by affecting elemental valence, leading to changes in magnetic behavior.
Review
Materials Science, Multidisciplinary
Suvodeep Paul, Saswata Talukdar, Ravi Shankar Singh, Surajit Saha
Summary: Transition metal dichalcogenides (TMDs) are 2D materials with exfoliate layered structure and various properties. This review focuses on MoTe2, a TMD that exhibits different phases and transitions. The topological phase transition between the metallic-type 1T ' phase and the topological T-d phase is extensively studied, exploring its relation with crystal structure, charge transport, and electronic band structure. The review also discusses the effects of reduced dimensionality, pressure, charge doping, and chemical substitution on the structural transition and superconducting transition temperatures, and suggests correlations between these apparently unrelated transitions. Additionally, open questions are presented to stimulate further research in understanding the physics and potential applications of these phase transitions.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2023)
Article
Multidisciplinary Sciences
Jian Gou, Hua Bai, Xuanlin Zhang, Yu Li Huang, Sisheng Duan, A. Ariando, Shengyuan A. Yang, Lan Chen, Yunhao Lu, Andrew Thye Shen Wee
Summary: Conventional ferroelectric compounds require at least two constituent ions for polarization switching. However, in a black phosphorus-like bismuth layer, a single-element ferroelectric state is observed, with concurrent ordered charge transfer and regular atom distortion between sublattices. The Bi atoms in the black phosphorous-like Bi monolayer exhibit a weak and anisotropic sp orbital hybridization, leading to the inversion-symmetry-broken buckled structure and charge redistribution. The in-plane electric polarization is induced in the Bi monolayer, which is experimentally visualized through scanning probe microscopy.
Article
Instruments & Instrumentation
Haibiao Zhou, Nadav Auerbach, Indranil Roy, Matan Bocarsly, Martin E. Huber, Barun Barick, Arnab Pariari, Markus Hucker, Zhi Shiuh Lim, A. Ariando, Alexey I. Berdyugin, Na Xin, Michael Rappaport, Yuri Myasoedov, Eli Zeldov
Summary: The scanning SQUID-on-tip microscope is a versatile tool for nanoscale imaging of magnetic, thermal, and transport properties. It is designed to be operated in a top-loading cryogen-free dilution refrigerator, enclosed in a vacuum-tight cell to suppress vibrations. In situ control of helium exchange gas pressure is achieved through two capillaries for thermal imaging. The microscope's performance is demonstrated through magnetic imaging of a magnetic topological insulator, magnetization and current distribution imaging in a ferromagnetic oxide thin film, and thermal imaging of dissipation in graphene.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2023)
Article
Multidisciplinary Sciences
Junxiong Hu, Junyou Tan, Mohammed M. Al Ezzi, Udvas Chattopadhyay, Jian Gou, Yuntian Zheng, Zihao Wang, Jiayu Chen, Reshmi Thottathil, Jiangbo Luo, Kenji Watanabe, Takashi Taniguchi, Andrew Thye Shen Wee, Shaffique Adam, A. Ariando
Summary: This study presents an experimental strategy to achieve controlled stacking of double-aligned hBN/graphene/hBN supermoire lattice by employing the golden rule of three. The challenge of rotational alignment in graphene supermoire lattice is overcome through the controlled production of 20 moire samples with accuracy better than 0.2 degrees, using the crystallographic edge of neighboring graphite to guide the stacking alignment. The technique is also extended to low-angle twisted bilayer graphene and ABC-stacked trilayer graphene, providing a strategy for flat-band engineering in these moire materials.
NATURE COMMUNICATIONS
(2023)
Article
Physics, Applied
Ming Yang, Ariando Ariando, Caozheng Diao, James C. Lee, Kaushik Jayaraman, Mansoor B. A. Jalil, Serban Smadici, Shengwei Zeng, Jun Zhou, Weilong Kong, Mark B. H. Breese, Sankar Dhar, Yuan Ping Feng, Peter Abbamonte, Thirumalai Venkatesan, Andrivo Rusydi
Summary: Using GA-RSXS and first-principles calculations, we found that the surface oxygen vacancy state and the interface conducting state co-exist in conducting LaAlO3/SrTiO3 (001) films, while both states are absent in the insulating film. By varying the oxygen vacancy density, we showed that the surface oxygen vacancy state is responsible for the insulator-metal transition, while the spatial charge distribution leads to a transition from two-dimensional-like to three-dimensional-like conductivity. Our results demonstrate the importance of surface oxygen vacancies in determining interface properties and provide a new strategy for probing electronic properties in complex oxide heterostructures using GA-RSXS.
APPLIED PHYSICS REVIEWS
(2023)
Article
Physics, Applied
Zhuoyue Jia, Chi Sin Tang, Jing Wu, Changjian Li, Wanting Xu, Kairong Wu, Difan Zhou, Ping Yang, Shengwei Zeng, Zhigang Zeng, Dengsong Zhang, Ariando Ariando, Mark B. H. Breese, Chuanbing Cai, Xinmao Yin
Summary: This study presents a novel approach for preparing high-quality water-sensitive YBCO films on flexible substrates without the need for a buffer layer. Experimental techniques were conducted to characterize the morphology, structure, and properties of the YBCO film before and after the extraction process, revealing the preservation of its pristine state. Further investigation revealed the formation of a YBCO passivated layer that effectively protected the freestanding YBCO during the etching process.
APPLIED PHYSICS REVIEWS
(2023)
Article
Chemistry, Physical
Shalini Badola, Supratik Mukherjee, B. Ghosh, Greeshma Sunil, G. Vaitheeswaran, A. C. Garcia-Castro, Surajit Saha
Summary: This study investigates the ferroelastic structural transition of Ba2ZnTeO6 and reports intriguing observations associated with the phase transition, including the presence of a central peak, huge softening in the soft mode, hysteretic phonon behavior, and signatures of coexistent phases.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Physics, Multidisciplinary
G. Krieger, L. Martinelli, S. Zeng, L. E. Chow, K. Kummer, R. Arpaia, M. Moretti Sala, N. B. Brookes, A. Ariando, N. Viart, M. Salluzzo, G. Ghiringhelli, D. Preziosi
Summary: The electronic and magnetic excitations and charge density correlations in Nd1-xSrxNiO2 thin films were studied, with and without a SrTiO3 capping layer. Dispersing magnons were observed only in the capped samples, progressively dampened with higher doping. An elastic resonant scattering peak similar to the charge order signal in hole-doped cuprates was detected in the uncapped x=0 compound, which weakens with doping and disappears in the superconducting x=0.20 film.
PHYSICAL REVIEW LETTERS
(2022)
Article
Multidisciplinary Sciences
Shengwei Zeng, Changjian Li, Lin Er Chow, Yu Cao, Zhaoting Zhang, Chi Sin Tang, Xinmao Yin, Zhi Shiuh Lim, Junxiong Hu, Ping Yang, Ariando Ariando
Summary: Superconductivity is observed in infinite-layer Ca-doped LaNiO2 thin films and their phase diagram is constructed. Unlike other nickelates, the undoped and underdoped films are entirely insulating, while a superconducting dome is observed in the overdoped regime. The Hall coefficient also changes at low temperature for highly doped samples.
