Article
Nanoscience & Nanotechnology
Pawan Kumar, Jason Lynch, Baokun Song, Haonan Ling, Francisco Barrera, Kim Kisslinger, Huiqin Zhang, Surendra B. Anantharaman, Jagrit Digani, Haoyue Zhu, Tanushree H. Choudhury, Clifford McAleese, Xiaochen Wang, Ben R. Conran, Oliver Whear, Michael J. Motala, Michael Snure, Christopher Muratore, Joan M. Redwing, Nicholas R. Glavin, Eric A. Stach, Artur R. Davoyan, Deep Jariwala
Summary: The study demonstrates the realization of excitonic metamaterials using atomically thin two-dimensional chalcogenide monolayers, enabling optical dispersion engineering and strong light-matter coupling. The engineered superlattice structures show evidence of exciton-polariton formation and high fidelity repeat units, paving the way for scalable designer optical metamaterials from atomically thin layers.
NATURE NANOTECHNOLOGY
(2022)
Article
Multidisciplinary Sciences
Long Zhang, Fengcheng Wu, Shaocong Hou, Zhe Zhang, Yu-Hsun Chou, Kenji Watanabe, Takashi Taniguchi, Stephen R. Forrest, Hui Deng
Summary: Controlling matter-light interactions with cavities is crucial in modern science and technology. By integrating MoSe2-WS2 heterobilayers in a microcavity, cooperative coupling between moire-lattice excitons and microcavity photons has been established, providing versatile control of both matter and light. This moire polariton system combines strong nonlinearity and microscopic-scale tuning of matter excitations, offering a platform to study collective phenomena from tunable arrays of quantum emitters.
Article
Chemistry, Multidisciplinary
Xiaoqing Chen, Yu Zhang, Ruijuan Tian, Xianghu Wu, Zhengdong Luo, Yan Liu, Xinran Wang, Jianlin Zhao, Xuetao Gan
Summary: A quadratically nonlinear photodetector (QNPD) composed of a van der Waals (vdW) stacked GaSe/InSe heterostructure is reported in this study. The QNPD exhibits unique electronic and optical attributes and extends the photodetection wavelength range from 900 to 1750 nm due to the extra second-harmonic generation (SHG) process in GaSe/InSe. It is highly sensitive to the variation of optical intensity and can be used as an autocorrelator for measuring ultrafast pulse widths and an optoelectronic mixer for signal processing.
Review
Chemistry, Multidisciplinary
Xiangdong Guo, Wei Lyu, Tinghan Chen, Yang Luo, Chenchen Wu, Bei Yang, Zhipei Sun, F. Javier Garcia de Abajo, Xiaoxia Yang, Qing Dai
Summary: 2D monolayers can be vertically stacked in van der Waals heterostructures to support a wide range of confined polaritons. This offers advantages in terms of controlling the constituent layers, stacking sequence, and twist angles. These heterostructures have extended the performance and functions of polaritons, and potential applications include nanophotonic integrated circuits.
ADVANCED MATERIALS
(2023)
Article
Multidisciplinary Sciences
A. J. Sternbach, S. H. Chae, S. Latini, A. A. Rikhter, Y. Shao, B. Li, D. Rhodes, B. Kim, P. J. Schuck, X. Xu, X-Y Zhu, R. D. Averitt, J. Hone, M. M. Fogler, A. Rubio, D. N. Basov
Summary: Layered crystals, such as tungsten diselenide, can exhibit unconventional optical properties that allow for the propagation of subdiffractional waveguide modes with hyperbolic dispersion. This study demonstrates optically induced hyperbolicity in WSe2 and explores the role of quantum transitions of excitons in the observed polaritonic response.
Review
Chemistry, Multidisciplinary
Hui-Lei Hou, Cosimo Anichini, Paolo Samori, Alejandro Criado, Maurizio Prato
Summary: In the past 15 years, 2D materials have revolutionized materials science and become powerful components for high-performance chemical sensors. By forming van der Waals heterostructures (VDWHs), the individual drawbacks of 2D materials can be overcome, leading to superior sensitivities, selectivity, and stability. This review discusses the latest developments in chemical sensors based on VDWHs of 2D materials, including sensing mechanisms and future directions with potential impact in environmental sciences and biomedical applications.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Baishan Liu, Xiankun Zhang, Junli Du, Jiankun Xiao, Huihui Yu, Mengyu Hong, Li Gao, Yang Ou, Zhuo Kang, Qingliang Liao, Zheng Zhang, Yue Zhang
Summary: This study proposes a synergistic strategy of contact-configuration design and thickness-modulation to construct high-performance van der Waals (vdW) photodiodes based on a typical type II heterostructure. By optimizing the contact architecture and thickness, efficient photocarrier collection and gate modulation are achieved, resulting in high external quantum efficiency (EQE) and ultrafast photoresponse.
Review
Chemistry, Multidisciplinary
Fang Wang, Tao Zhang, Runzhang Xie, Anna Liu, Fuxing Dai, Yue Chen, Tengfei Xu, Hailu Wang, Zhen Wang, Lei Liao, Jianlu Wang, Peng Zhou, Weida Hu
Summary: With the continuous advancement of nanofabrication techniques and the discovery of useful manipulation mechanisms in high-performance applications, the morphology and usage of junction devices in photodetectors have undergone fundamental revolution. New types of photodetectors, not relying on any junction, have emerged, offering high signal-to-noise ratio and multidimensional modulation. This review focuses on a unique category of material systems, van der Waals materials, which support novel high-performance photodetectors beyond junctions.
ADVANCED MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Tianping Ying, Tongxu Yu, Yanpeng Qi, Xiaolong Chen, Hideo Hosono
Summary: By breaking traditional alloying strategy restrictions, the high entropy concept has expanded the field of alloy exploitation. This review focuses on the combination of the high entropy concept and van der Waals systems to create a new category of materials called high entropy van der Waals materials (HEX). The design strategy for HEX incorporates the local features of high entropy materials and the holistic degrees of freedom in van der Waals materials, successfully leading to the discovery of various high entropy compounds with desirable physical properties. Additionally, deliberate design of structural units and their stacking configuration in HEX can also enhance catalytic performance.
Article
Chemistry, Multidisciplinary
Bing Zhao, Roselle Ngaloy, Sukanya Ghosh, Soheil Ershadrad, Rahul Gupta, Khadiza Ali, Anamul Md. Hoque, Bogdan Karpiak, Dmitrii Khokhriakov, Craig Polley, Balasubramanian Thiagarajan, Alexei Kalaboukhov, Peter Svedlindh, Biplab Sanyal, Saroj P. Dash
Summary: This article demonstrates the robust room-temperature operation of lateral spin-valve devices using the vdW ferromagnet Fe5GeTe2 in heterostructures with graphene. Spin-dynamics measurements reveal multidirectional spin polarization at the Fe5GeTe2/graphene interface. Density functional theory calculations and Monte Carlo simulations reveal significantly canted Fe magnetic moments in Fe5GeTe2 along with the presence of negative spin polarization at the interface. These findings open opportunities for vdW interface design and applications of vdW-magnet-based spintronic devices at ambient temperatures.
ADVANCED MATERIALS
(2023)
Article
Biotechnology & Applied Microbiology
Zhang Yi, Yu Hongda, Sun Mengdi, Xu Yong
Summary: This paper presents a hybrid swarming algorithm that combines Ant Colony Optimization and Physarum Polycephalum Algorithm, and introduces the use of Van Der Waals force in the pheromone update mechanism. The improved algorithm prevents premature convergence into local optima and has demonstrated excellent accuracy and convergence time in simulations. Comparison with other advanced algorithms also indicates its superior performance. The robustness and versatility of the hybrid algorithm are further verified using the capitals of 35 Asian countries.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Wen Zhang, Ping Kwan Johnny Wong, Sheng Jiang, Qian Chen, Wei Huang, Andrew Thye Shen Wee
Summary: This review critically evaluates the state-of-the-art of van der Waals interfaces and their potential technological applications in spintronics. It highlights major challenges, proposes a viable solution, and identifies emerging spin-based technologies that could benefit from the versatile van der Waals interfaces enabled by the strategy.
Review
Materials Science, Multidisciplinary
Lixin Liu, Tianyou Zhai
Summary: The article reviews the latest research activities on wafer-scale vdWHs and their applications, outlining preparation strategies and applications to showcase their potential in electronic, optoelectronic, and flexible devices fields.
Article
Nanoscience & Nanotechnology
Aneesh Bapat, Saurabh Dixit, Yashika Gupta, Tony Low, Anshuman Kumar
Summary: The recent discovery of natural biaxial hyperbolicity in van der Waals crystals has opened up new possibilities for mid-IR nanophotonics. This study investigates heterostructures of graphene and alpha-MoO3 for actively tunable phonon polariton modes. The hybridization of graphene plasmon polaritons with hyperbolic phonon polaritons is observed, and the system shows a broad operational bandwidth.
Article
Chemistry, Multidisciplinary
Maurits J. A. Houmes, Samuel Manas-Valero, Alvaro Bermejillo-Seco, Eugenio Coronado, Peter G. Steeneken, Herre S. J. van der Zant
Summary: This article investigates the structural anisotropy of CrPS4 and its relationship with magnetic phase transitions and discovers different mechanical response behavior compared to previously studied van der Waals magnets. The results demonstrate the potential of CrPS4 in the field of low-dimensional magnetism and show the potential of mechanical resonators in studying structural modifications in 2D materials and van der Waals heterostructures.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Mathematics, Applied
Rossen Ivanov, Tony Lyons, Nigel Orr
JOURNAL OF NONLINEAR SCIENCE
(2020)
Article
Mathematics, Applied
Rossen Ivanov, Vakhtang Putkaradze
PHYSICA D-NONLINEAR PHENOMENA
(2020)
Article
Physics, Multidisciplinary
Rossen I. Ivanov
EUROPEAN PHYSICAL JOURNAL PLUS
(2020)
Article
Mathematics, Applied
Vladimir S. Gerdjikov, Rossen I. Ivanov
Summary: This study formulates multi-component integrable generalizations of the Fokas-Lenells equation associated with each irreducible Hermitian symmetric space. It provides a description of the underlying structures related to integrability, such as the Lax representation and bi-Hamiltonian formulation of the equations. The study also considers two reductions, one of which leads to a nonlocal integrable model, and presents detailed examples with Hermitian symmetric spaces of all classical series types A.III, BD.I, C.I, and D.III, as well as possibilities for further reductions.
Article
Mathematics, Applied
Joseph D. Cullen, Rossen I. Ivanov
Summary: This study proposes the derivation of the model equations for the internal wave propagation considering the Coriolis effect. The analysis focuses on long-wave and intermediate long-wave propagation, resulting in models similar to the well-known Ostrovsky equation, which describe wave propagation over the two spatial horizontal dimensions of the ocean surface.
COMMUNICATIONS ON PURE AND APPLIED ANALYSIS
(2022)
Article
Mathematics, Applied
Rossen I. Ivanov, Calin Martin, Michail D. Todorov
Summary: The study focuses on the effects of an uneven bottom on internal wave propagation in the presence of stratification and non-uniform currents, finding that in the long wave approximation, the interface satisfies a specific type of equation and investigating the effects of wave propagation.
PHYSICA D-NONLINEAR PHENOMENA
(2022)
Article
Mathematics, Interdisciplinary Applications
Rossen I. Ivanov
Summary: In this paper, an integrable model of Nonlinear Schrodinger (NLS)-type is studied through its Lax representation. The associated spectral problem, the Riemann-Hilbert problem formulation, the conserved quantities, as well as a generalisation for symmetric spaces are discussed. Furthermore, the potential for modeling with higher order NLS (HNLS) integrable equations and the relevance of the proposed system are explored.
CHAOS SOLITONS & FRACTALS
(2022)
Article
Mathematics, Applied
Rossen I. Ivanov
Summary: This study investigates the propagation of water waves of finite depth and flat bottom when the depth is not small compared to the wavelength. It complements the well-known KdV equation that describes the long-wave regime. The derivation of a nonlinear and nonlocal model equation in evolutionary form using the Hamiltonian approach is discussed, and its potential implications for numerical solutions are considered.
APPLIED MATHEMATICS LETTERS
(2023)
Article
Mathematics
Delia Ionescu-Kruse, Rossen Ivanov
Summary: This paper investigates the two-dimensional water-wave problem in a fluid volume with a general non-zero vorticity field, involving the nonlinear equations of motion for the free surface and volume variables in the fluid domain. The Dirichlet-Neumann operator and the Green function of the Laplace operator are used to provide new explicit expressions for these variables. The interaction between a point vortex and the free surface is studied as an example, obtaining coupled equations for the dynamics of the point vortex and the time evolution of the free surface variables in the small-amplitude long-wave Boussinesq and KdV regimes.
JOURNAL OF DIFFERENTIAL EQUATIONS
(2023)
Article
Physics, Fluids & Plasmas
Dan Lucas, Marc Perlin, Dian-Yong Liu, Shane Walsh, Rossen Ivanov, Miguel D. Bustamante
Summary: This study examines the simplest arrangement of resonant deep-water gravity waves in one-dimensional propagation from theoretical, numerical, and experimental perspectives. Theoretical analysis uses a normal-form Hamiltonian focusing on 5-wave resonances, while numerical simulations reveal more efficient energy transfer near resonant conditions. Experiments demonstrate triad phase synchronization at resonance, providing independent evidence for the phenomenon.
Article
Mechanics
Joseph Cullen, Rossen Ivanov
EUROPEAN JOURNAL OF MECHANICS B-FLUIDS
(2020)
Article
Mathematics, Applied
Alan Compelli, Rossen Ivanov
DISCRETE AND CONTINUOUS DYNAMICAL SYSTEMS
(2019)
Article
Mathematics, Applied
Vladimir S. Gerdjikov, Rossen I. Ivanov, Aleksander A. Stefanov
JOURNAL OF GEOMETRIC MECHANICS
(2019)
Article
Astronomy & Astrophysics
Rossen I. Ivanov, Emil M. Prodanov
