Article
Nanoscience & Nanotechnology
Sanghyun Moon, Donggyu Lee, Jehwan Park, Jihyun Kim
Summary: This study demonstrates the fabrication of a high dielectric constant, 2D amorphous gallium oxide (GaOX) using the liquid-gallium squeezing technique. The GaOX is combined with a beta-phase gallium oxide (β-Ga2O3) conducting nanolayer to form a stable MISFET. The incorporation of the 2D GaOX gate dielectric layer in an active channel layer enables the facile fabrication of MISFET devices at room temperature.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Physics, Applied
Angel Andueza, Jesus Perez-Conde, Joaquin Sevilla
Summary: During the last decades, 2D-ordered and disordered photonic systems have been heavily researched due to their ability to control and modify light flow. These systems can localize light into a bandgap by exciting states from cavities, defects, or photonic molecules. A controllable random disordered photonic system composed of silicon dielectric cylinders, exhibiting a deep bandgap and two tunable resonant states generated from embedded decagonal ring resonators, has been reported. These resonant states demonstrate high transmission intensity and a stable bandwidth even when the system's geometrical parameters are modified for frequency tuning. The ability to tune resonating frequencies with the system's geometrical parameters enables interesting applications such as sensing and filtering.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Shanquan Chen, Shuai Yuan, Zhipeng Hou, Yunlong Tang, Jinping Zhang, Tao Wang, Kang Li, Weiwei Zhao, Xingjun Liu, Lang Chen, Lane W. Martin, Zuhuang Chen
Summary: The paper explores recent advances in the study of topological spin/polarization structures in ferroic materials, including the evolution of topological spin structures and exotic polar topologies in magnetic thin films and ferroelectric oxide films. It discusses the control of these structures and emergent phenomena through factors such as epitaxial strain, layer thickness, electric fields, and magnetic fields. Additionally, the paper provides a brief overview and prospectus for the future development of the field in the coming years.
ADVANCED MATERIALS
(2021)
Article
Materials Science, Ceramics
Kumar Brajesh, Sudhir Ranjan, Rishow Kumar, Rajeev Gupta, Ambesh Dixit, Ashish Garg
Summary: In this manuscript, the room-temperature properties of CuO and Cu0.995La0.005O ceramics synthesized by solid-state reaction method were investigated. La doping in CuO leads to the evolution of compact and dense microstructure with reduced porosity. The La doping induces strain in the CuO lattice resulting in a reduction in the lattice parameters and cell volume. The dielectric constant of Cu0.995La0.005O ceramics is enhanced and the leakage current is reduced, attributed to the dense microstructure and strain in CuO lattice after La doping. The bandgap of Cu0.995La0.005O ceramics decreases due to increased vacancy defect concentration, and the magnetic and dielectric properties are correlated with the grain size in La-doped CuO.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Review
Crystallography
Chonghai Qi, Cheng Ling, Chunlei Wang
Summary: Experiments and theory have shown that adsorbed and confined water on two-dimensional solid surfaces can exhibit various phases, affecting surface wetting behavior, dielectric properties, and frictions. This includes the unexpected phenomenon of an ordered water monolayer that does not completely wet water at T=300K and the anomalous low dielectric properties due to ordered water.
Article
Chemistry, Multidisciplinary
Da Huo, Yusong Bai, Xiaoyu Lin, Jinghao Deng, Zemin Pan, Chao Zhu, Chuansheng Liu, Hongyi Yu, Chendong Zhang
Summary: This paper reports the direct probing results of the electronic structures of In2Se3/WSe2 heterostructures at the single-layer limit. It is found that monolayer In2Se3 can be either antiferroelectric or ferroelectric at sufficiently low temperatures, and a general type-II band alignment is revealed for this heterostructure. Significant modulations of the valley structures of WSe2 and in situ transformations between the ferroelectric and antiferroelectric In2Se3 phases are also observed.
Article
Optics
Dian Wan, Ting Li, Si Chen, Weicheng Chen, Haofeng Hu, Sze Yun Set, Shinji Yamashita, Li Shen, Yi Zou, Tiegen Liu, Zhenzhou Cheng
Summary: Hyperuniform disordered solid (HUDS) structures provide large, uniform, complete, and isotropic light confinement at the nanoscale. In this study, a morphology engineering method is used to tailor HUDS photonic bandgaps (PBGs) and improve HUDS waveguide devices. Results show that Bezier-curve-decorated HUDS devices achieve increased PBG widths, improved transmittance, and enhanced quality factors, with compatibility for device fabrication.
LASER & PHOTONICS REVIEWS
(2023)
Article
Materials Science, Ceramics
Clive A. Randall, Zhongming Fan, Ian Reaney, Long-Qing Chen, Susan Trolier-McKinstry
Summary: Antiferroelectric (AFE) materials are scientifically rich and commonly utilized in high-energy density capacitors. The phase transition in AFEs is influenced by factors like electric field strength, pressure, and crystal/grain size, leading to competition between AFE and ferroelectric (FE) phases. Additionally, besides the perovskite family, other crystal structures also exhibit AFE behavior.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Physical
M. I. Arshad, M. S. Hasan, Atta Ur Rehman, N. Amin, Le Duc Tung, N. T. Kim Thanh, N. A. Morley, Mongi Amami, Faisal Alresheedi, Safa Ezzine, M. A. Gadhi
Summary: A series of Zn0.4Co0.6-xMgxFe1.9La0.1O4 nanoferrites were synthesized via co-precipitation technique, and the influence of Mg doping on the crystal structure, electrical, and magnetic properties was investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Pengfei Yan, Liang Ji, Xiaopeng Liu, Qinghua Guan, Junling Guo, Yonglong Shen, Haijun Zhang, Weifeng Wei, Xinwei Cui, Qun Xu
Summary: The study found that a non-vdW heterostructure can strongly stabilize aMoO3_x while maintaining high electrical conductivity, optimizing lithium-ion storage kinetics and achieving high-performance energy storage materials. This work opens up a promising platform for boosting and understanding lithium-ion storage performance.
Article
Materials Science, Multidisciplinary
Corey L. Arnold, Chukwudi E. Iheomamere, Maddox Dockins, Spencer Gellerup, Nicholas R. Glavin, Christopher Muratore, Nigel D. Shepherd, Andrey A. Voevodin
Summary: Ultra-thin amorphous boron oxynitride films were deposited at room temperature on silicon and polymer substrates using radio frequency magnetron sputtering of a hexagonal boron nitride target, showing high dielectric breakdown strength and bandgap suitable for insulation or gate dielectric applications in thin-films flexible transistors and other electronics.
Review
Chemistry, Multidisciplinary
Junwei Chu, Yang Wang, Xuepeng Wang, Kai Hu, Gaofeng Rao, Chuanhui Gong, Chunchun Wu, Hao Hong, Xianfu Wang, Kaihui Liu, Chunlei Gao, Jie Xiong
Summary: The emergence of 2D polarized materials has demonstrated unique quantum behaviors at atomic scales and their applications in information storage and processing have developed significantly in recent years. This review focuses on the basic 2D polarized materials system and their applications in spintronics, valleytronics, and electronics, highlighting the underlying physical mechanisms, symmetry broken theory, and modulation process through heterostructure engineering. These summarized works will continue to enrich the understanding of 2D quantum systems and promising practical applications.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Yu-Tian Zhang, Yun-Peng Wang, Xianli Zhang, Yu-Yang Zhang, Shixuan Du, Sokrates T. Pantelides
Summary: This paper addresses the question of the structure of single-atom-thick amorphous monolayers, and finds that the structure of elemental amorphous graphene and binary monolayer amorphous BN is different from previously debated options. The implications for other nonelemental 2D and bulk amorphous materials are also discussed.
Article
Materials Science, Multidisciplinary
T. T. Nhung Nguyen, T. Sollfrank, C. Tegenkamp, E. Rauls, U. Gerstmann
Summary: The study demonstrates that the structure of weakly bound, purely vdW interacting systems is strongly influenced by screening and relaxation, as shown by combining STM and DFT methods. Analysis indicates that the deformation ability of vdW coupled systems affects molecular morphology and band structure.
Article
Chemistry, Physical
Bushra Khan, Manoj K. Singh, Aditya Kumar, Arushi Pandey, Sushmita Dwivedi, Upendra Kumar, Surbhi Ramawat, Sumit Kukreti, Ambesh Dixit, Somnath C. Roy
Summary: KBiFe2O5 (KBFO) is a multiferroic compound with a narrow band gap, synthesized using sol-gel technique and characterized by XRD, SEM, UV visible spectroscopy, electrical, magnetic, and impedance spectroscopy analyses. The results confirm the multiferroic behavior, weak ferromagnetic nature, negative magneto-dielectric coupling, and strong MD coupling in KBFO, making it a promising candidate for room-temperature multiferroicity with potential for photovoltaic applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Astronomy & Astrophysics
Anna Ijjas, Paul J. Steinhardt
Summary: This paper tracks the evolution of entropy and black holes in a cyclic universe that undergoes repeated intervals of expansion and contraction. The study discovers that after each contraction, entropy naturally reaches near-maximal levels in the matter-radiation sector and near-minimal levels in the gravitational sector.
Article
Chemistry, Multidisciplinary
Mira Naftaly, Gian Savvides, Fawwaz Alshareef, Patrick Flanigan, GianLuc Lui, Marian Florescu, Ruth Ann Mullen
Summary: This study examines the porosity and inhomogeneity of 3D printed materials using terahertz time-domain spectroscopy and analyzes the effects of 3D printer settings. By systematically varying printer parameters, a sweet spot of printer settings is found where porosity and inhomogeneity are minimized.
APPLIED SCIENCES-BASEL
(2022)
Article
Materials Science, Multidisciplinary
Nicoletta Granchi, Richard Spalding, Matteo Lodde, Maurangelo Petruzzella, Frank W. Otten, Andrea Fiore, Francesca Intonti, Riccardo Sapienza, Marian Florescu, Massimo Gurioli
Summary: Disordered photonic nanostructures have attracted extensive attention due to their fascinating physics and wide range of applications. In recent years, the study of dielectric disordered systems has made progress by considering long-range correlation. Hyperuniform photonic materials, combining features of photonic crystals and random systems, allow for customized light transport from diffusion to light localization. By combining hyperuniform disordered (HuD) design, embedded quantum dots, and near-field hyperspectral imaging, the transition from localization to diffusion in photonic HuD systems is explored. Theoretical and experimental results show that these systems support resonances ranging from strongly localized modes to extended modes. Anderson-like modes with high Q/V are created, with small footprint and resistance to fabrication-induced disorder, opening up a new photonic platform for quantum applications.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Multidisciplinary Sciences
Luca Bindi, Matthew A. Pasek, Chi Ma, Jinping Hu, Guangming Cheng, Nan Yao, Paul D. Asimow, Paul J. Steinhardt
Summary: We report the discovery of a dodecagonal quasicrystal Mn72.3Si15.6Cr9.7Al1.8Ni0.6, composed of a periodic stacking of atomic planes with quasiperiodic translational order and 12-fold symmetry along the two directions perpendicular to the planes, accidentally formed by an electrical discharge event in an eolian dune in Nebraska. The quasicrystal coexists with a cubic crystalline phase and was found in a fulgurite consisting predominantly of fused and melted sand along with traces of melted conductor metal from a downed power line. This discovery suggests the possibility of finding quasicrystals in other places and synthesizing them in the laboratory.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Multidisciplinary Sciences
Qingxia Ma, Hongfei Jiang, Leina Ma, Gaoxiang Zhao, Qianqian Xu, Dong Guo, Ningning He, Hao Liu, Zhaoyuan Meng, Juanjuan Liu, Lei Zhu, Qian Lin, Xiaolin Wu, Min Li, Shudi Luo, Jing Fang, Zhimin Lu
Summary: It has been discovered that the expression levels of the glycolytic enzyme ENO1 are positively correlated with CHKa expression levels in human glioblastoma specimens. ENO1 regulates CHKa expression through post-translational modification. Mechanistically, highly expressed ENO1 in tumor cells binds to I199/F200 of CHKa, leading to the inhibition of TRIM25-mediated poly-ubiquitylation of CHKa at K195 and increased stability of CHKa. These findings provide insight into the integrated regulation of cancer metabolism by the crosstalk between glycolytic and lipidic enzymes.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Geochemistry & Geophysics
Chi Ma, Jinping Hu, Martin D. Suttle, Yunbin Guan, Thomas G. Sharp, Paul D. Asimow, Paul J. Steinhardt, Luca Bindi
Summary: A newly discovered micrometeorite from Sudan exhibits an exotic Al-Cu-Fe assemblage similar to that found in the Khatyrka chondrite. By analyzing oxygen isotope ratios and conducting transmission electron microscopy, researchers found evidence suggesting that the micrometeorite is most likely related to CR chondrites. The study also provides additional evidence for the occurrence of naturally-occurring Al-Cu alloys and suggests the existence of multiple pathways for the association of these two elements.
METEORITICS & PLANETARY SCIENCE
(2023)
Article
Physics, Multidisciplinary
Giorgi Tukhashvili, Paul J. Steinhardt
Summary: We demonstrate that fermion condensation of the Nambu-Jona-Lasinio type can lead to a nonsingular bounce that smoothly connects a phase of slow contraction to a phase of expansion. This approach avoids the problem of generating a large anisotropy and chaotic behavior.
PHYSICAL REVIEW LETTERS
(2023)
Article
Astronomy & Astrophysics
David Garfinkle, Anna Ijjas, Paul J. Steinhardt
Summary: We present the initial findings from a new numerical relativity code that uses a tetrad formulation of the Einstein-scalar field equations and recently introduced gauge/frame invariant diagnostics. The results provide evidence that inflation does not address the issue of homogeneity and isotropy starting from generic initial conditions after the big bang.
Article
Nanoscience & Nanotechnology
Nicoletta Granchi, Francesca Intonti, Marian Florescu, Pedro David Garciïa, Massimo Gurioli, Guillermo Arregui
Summary: This paper discusses the permeation of the quality factor (Q) of photonic resonators in various figures of merit for cavity-enhanced light-matter interaction applications. The authors propose a method for automated shape optimization of the Q factor using the theoretical framework of quasinormal modes (QNMs) and a finite-element complex eigensolver. The approach is applied to both ordered and disordered environments, resulting in significant improvements in the Q factor of the photonic modes.
Article
Materials Science, Multidisciplinary
N. Granchi, M. Lodde, K. Stokkereit, R. Spalding, P. J. van Veldhoven, R. Sapienza, A. Fiore, M. Gurioli, M. Florescu, F. Intonti
Summary: Recent research has shown that hyperuniform disordered photonic materials exhibit large, complete photonic band gaps and isotropic optical properties, making them competitive with periodic and quasiperiodic counterparts for optoelectronic applications. In this study, high quality factor optical cavities in hyperuniform disordered architectures are fabricated and experimentally characterized using scanning near-field optical microscopy. By engineering the structural parameters of the cavity, we achieve an experimental quality factor higher than the Anderson states and demonstrate the coexistence of three types of localized modes within a small area and narrow spectral window of the disordered correlated system.
Article
Quantum Science & Technology
Adam Burgess, Marian Florescu
Summary: This article explores the dynamics of many-body atomic systems coupled to Lorentzian photonic cavity systems. The study reveals interesting dynamical characteristics, such as non-zero steady states, super-radiant decay, enhanced energy transfer, and the ability to modulate oscillations in the atomic system by tuning environmental degrees of freedom. Various configurations are analyzed to investigate the energy transfer rate and decay dynamics. The validity of the rotating wave approximation is also examined and found to be reliable in the weak coupling regime.
AVS QUANTUM SCIENCE
(2023)
Article
Quantum Science & Technology
Adam Burgess, Marian Florescu, Dominic M. Rouse
Summary: This study derives a master equation for systems with permanent dipole moments and an externally applied driving field using an optical polaron transformation. The permanent dipoles have significant effects on the system dynamics and emission spectrum, introducing multiple-photon processes and a photon sideband, and can be exploited to control the coherence and transition rates of the system.
AVS QUANTUM SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Latham Boyle, Paul J. Steinhardt
Summary: This study focuses on 1D quasilattices, particularly self-similar ones, which can be used to generate quasicrystalline tessellations with matching and invertible self-similar substitution rules. The study describes the geometric constructions and equivalence classes of these quasilattices and provides explicit transformation laws between quasilattices in the same class. The study also presents ten special self-similar 1D quasilattices relevant for constructing patterns in higher dimensions and explicitly constructs the corresponding self-same quasilattices.
Article
Materials Science, Multidisciplinary
Latham Boyle, Paul J. Steinhardt
Summary: This study presents a precise geometric relationship between various geometric patterns and expands the number of known examples. By identifying this relationship, the authors are able to systematically obtain these patterns and their properties, and complete the enumeration of quasicrystallographic space groups.
Article
Optics
Adam Burgess, Marian Florescu
Summary: This study explores the dynamics of coupled atomic two-level systems within a generic bosonic reservoir. In the regime where many atoms are identically coupled to a single reservoir, interesting effects are identified, such as the strong impact of the initial configuration of atomic excited-state amplitudes on the system dynamics, which can even sever the system from its environment. Additionally, it is found that steady-state amplitudes of the excited states become independent of the specific structure of the bosonic reservoirs considered.
