Article
Physics, Applied
Shuchun Huan, Dinghui Wang, Hao Su, Hongyuan Wang, Xia Wang, Na Yu, Zhiqiang Zou, Haijun Zhang, Yanfeng Guo
Summary: We have uncovered a magnetic exchange-induced topological phase transition in the natural van der Waals crystal MnSb2Te4, demonstrating the interplay between magnetism and nontrivial topology of the electronic band structure. This discovery sets an important paradigm for future research in this field.
APPLIED PHYSICS LETTERS
(2021)
Article
Physics, Multidisciplinary
Farzad Mahfouzi, Nicholas Kioussis
Summary: This study presents the phenomenon of charge and spin currents induced by acoustic phonons and analyzes the origin and properties of the pumped currents.
PHYSICAL REVIEW LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Dianwu Wang, Chaoxi Cui, Xiao-Ping Li, Run-Wu Zhang
Summary: In this study, we explore the possible topological properties in chiral crystals and identify a complete list of topological charge-2 (C-2) Dirac fermions based on the Sohncke space groups. These emergent fermions in chiral crystals have a higher topological charge number and exhibit unique characteristics, including multiple Fermi arcs. We propose N4Cl as a high-quality C-2 Dirac semimetal and demonstrate the manipulation of topological phase transitions in N4Cl by applying shear strains.
Article
Multidisciplinary Sciences
Alexander A. A. Milner, V. A. Apkarian, Valery Milner
Summary: Molecules immersed in liquid helium have been used as excellent probes to study superfluidity, providing valuable clues about the superfluid at the nanoscale through their electronic, vibrational, and rotational dynamics. In this study, we experimentally investigated the laser-induced rotation of helium dimers inside superfluid He-4 at different temperatures. We initiated controlled rotational dynamics of He2* using ultrashort laser pulses and tracked them using time-resolved laser-induced fluorescence. The observed temperature dependence suggests nonequilibrium evolution of the quantum bath and the emission of the wave of second sound. This method offers a way to study superfluidity with molecular nanoprobes under variable thermodynamic conditions.
Article
Physics, Multidisciplinary
M. O. Brown, S. R. Muleady, W. J. Dworschack, R. J. Lewis-Swan, A. M. Rey, O. Romero-Isart, C. A. Regal
Summary: This study demonstrates the measurement and reconstruction of quantum mechanical states through the direct measurement of position and momentum. By using optical tweezers to measure the momentum and trap harmonic evolution, we have successfully observed non-classical motional states and demonstrated some of their quantum properties. This research is important for quantum information, metrology, and the study of quantum behavior in massive levitated particles.
Article
Physics, Multidisciplinary
Connor M. Holland, Yukai Lu, Lawrence W. Cheuk
Summary: We present a novel bichromatic fluorescent imaging scheme for detecting single trapped CaF molecules. With a modest photon budget, we achieve high imaging and nondestructive detection fidelities, suggesting its potential extension to laser-coolable molecules with less favorable optical cycling properties. Additionally, we develop a framework and new methods to characterize loss mechanisms during fluorescent detection of trapped molecules, including two-photon decay and higher excited states induced by trapping light. Particularly, we introduce a novel method for the dispersive measurement of transition matrix elements between electronically excited states.
PHYSICAL REVIEW LETTERS
(2023)
Article
Multidisciplinary Sciences
S. Samaneh Ataei, Daniele Varsano, Elisa Molinari, Massimo Rontani
Summary: The spontaneous condensation of excitons, similar to Cooper pairs in superconductors, can potentially lead to a new phase called an excitonic insulator (EI) in semiconductors. At high pressure, bulk MoS2 is shown to be prone to condensation of genuine excitons with finite momentum, while the phonon dispersion remains regular. The EI phase sustains an out-of-plane permanent electric dipole moment with an antiferroelectric texture in the layer plane, providing a unique Raman fingerprint for its formation. Direct spectroscopic confirmation of an ideal excitonic insulator phase in bulk MoS2 above 30 GPa has been achieved through Raman features observed experimentally.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Economics
Luis Sarmiento, Anahi Molar-Cruz, Charalampos Avraam, Maxwell Brown, Juan Rosellon, Sauleh Siddiqui, Baltazar Solano Rodriguez
Summary: The study examines the impact of natural gas prices on the power systems of Mexico and the United States, showing that high prices lead to increased use of carbon-intensive technologies in the short term and boost renewable investments in the long term. Results also indicate that low natural gas prices reduce coal use in the United States, with heterogeneous effects seen in Mexico across models. These findings can help policymakers understand the influence of natural gas prices in the energy sectors of both countries.
Article
Automation & Control Systems
Bolin Li, Lijun Zhu, Zhiyong Chen
Summary: This article presents an improved fractional-order active disturbance rejection control scheme to approximate the open-loop transfer function of an uncertain system. The proposed controller improves the system's robustness and uses an improved fractional-order extended state observer for better estimation performance. Compared to conventional controllers, the proposed scheme has a simpler form, better transient performance, and more robustness against parameter variation.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Nanoscience & Nanotechnology
Leon Zaporski, Noah Shofer, Jonathan H. Bodey, Santanu Manna, George Gillard, Martin Hayhurst Appel, Christian Schimpf, Saimon Filipe Covre da Silva, John Jarman, Geoffroy Delamare, Gunhee Park, Urs Haeusler, Evgeny A. Chekhovich, Armando Rastelli, Dorian A. Gangloff, Mete Atature, Claire Le Gall
Summary: Combining highly coherent spin control with efficient light-matter coupling, this study demonstrates the ability to decouple electron spin qubits in optically active semiconductor quantum dots beyond 0.113(3) ms, overcoming the limitations imposed by nuclear inhomogeneity. The findings show a promising solution to the material science challenge and establish the basis for highly coherent spin-photon interfaces.
NATURE NANOTECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
M. L. Savchenko, A. Shuvaev, I. A. Dmitriev, S. D. Ganichev, Z. D. Kvon, A. Pimenov
Summary: This study demonstrates that the inherent property of microwave-induced resistance oscillations (MIRO) in solid-state two-dimensional electron systems (2DES) is not immune to the sense of circular polarization. The researchers found that the MIRO signal can be increased up to 30 times for the cyclotron resonance active helicity, which is consistent with the transmission and absorption shape of Drude. Additionally, the study investigates the extrinsic near-field effects that can produce an apparent immunity of the photoresponse using 2DES as a sensitive sensor of the polarization state.
Article
Mechanics
Paolo Gajoni, Alberto Guardone
Summary: This article investigates the properties of two-dimensional compressible flows in radial equilibrium, considering both ideal and non-ideal conditions. The study derives a differential relation for the Mach number dependency on the radius and analytically integrates it for ideal flows. Numerical simulations confirm the predicted flow evolution from uniform flow conditions to the radial equilibrium profile.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Multidisciplinary Sciences
Jiahuan Ren, Qing Liao, Feng Li, Yiming Li, Olivier Bleu, Guillaume Malpuech, Jiannian Yao, Hongbing Fu, Dmitry Solnyshkov
Summary: This study presents a direct measurement of the Berry curvature and quantum metric of photon modes in a planar cavity containing a birefringent organic microcrystal, showcasing the potential application of optical activity. The experiment conducted at room temperature and visible wavelength highlights the use of organic materials for implementing non-magnetic and low-cost topological photonic devices. The authors' direct measurement of the nontrivial Berry curvature in a birefringent continuous organic system with emergent optical activity offers new insights in the field of topological photonics.
NATURE COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Qing-Bo Liu, Zhe-Qi Wang, Hua-Hua Fu
Summary: Using first-principles calculations and symmetry analysis, we discovered that rubidium-catenatelluridoaurate-family materials in space group (SG) 51 can exhibit ideal nodal-surface phonons, protected by symmetry. The phonon spectra of these materials show nearly flat phonon bands, with twofold degenerate nodal points forming a nodal line on the (001) surface. This study supports the existence of topologically nontrivial nodal-surface phonons in realistic materials and proposes an effective method to search for them.
Article
Materials Science, Multidisciplinary
Orr Rapoport, Moshe Goldstein
Summary: In this work, the authors study the behavior of topological systems with non-Hermitian boundary conditions. They find that the emergence of edge modes is modified compared to the Hermitian case, and propose a modified contour in the wave-vector plane to correctly count the edge modes. The topological structure remains the same as in the Hermitian case.
Article
Chemistry, Physical
Peter Cats, Ranisha S. Sitlapersad, Wouter K. den Otter, Anthony R. Thornton, Rene van Roij
Summary: The study compares expensive Brownian Dynamics simulations with classical Density Functional Theory calculations and finds excellent overall agreement for various system parameters. The study focuses on distinguishing differential capacitance at fixed number of ions and fixed ionic chemical potential, and derives and exploits their thermodynamic relations. The quantitative agreement between simulation and theory indicates the potential of DFT for accurately studying room temperature ionic liquids at lower dielectric constants than water.
JOURNAL OF SOLUTION CHEMISTRY
(2022)
Article
Engineering, Chemical
Haolan Tao, Cheng Lian, Hao Jiang, Chunzhong Li, Honglai Liu, Rene van Roij
Summary: The research on electrocatalytic nitrogen reduction reaction (NRR) is still facing challenges and urgently requires the design of highly selective catalysts. This study analyzed the impact of EDL, mass transport, and NRR kinetics on the reaction through a theoretical framework, providing insights into the relationship between N-2 diffusion and activity in different environmental conditions.
Article
Multidisciplinary Sciences
Da Wang, Michiel Hermes, Stan Najmr, Nikos Tasios, Albert Grau-Carbonell, Yang Liu, Sara Bals, Marjolein Dijkstra, Christopher B. Murray, Alfons van Blaaderen
Summary: In this study, the structure of supraparticles self-assembled from nanoplatelets in slowly drying emulsion droplets was explored using experiments, advanced electron tomography, and computer simulations. The researchers demonstrated that the rich phase behavior of nanoplatelets and their sensitivity to subtle changes in shape and interaction potential can be utilized to guide the self-assembly into various structures, providing precise control over the orientation and position order of the nanoplatelets.
NATURE COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Mark Aarts, Willem Q. Boon, Blaise Cuenod, Marjolein Dijkstra, Rene van Roij, Esther Alarcon-Llado
Summary: This paper studies ion current rectification (ICR) in micrometer sized conical channels and reveals the key role of entrance resistance in ICR and Ohmic conductance. The study finds that membrane surface potential has a significant impact on the observed resistance and rectification phenomena, and this hypothesis is experimentally verified. Additionally, the study discovers that the interaction between pores in ICR is influenced by the long-ranged decay of concentration.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
A. Arjun, Peter G. Bolhuis
Summary: Methane hydrates are formed through nucleation and growth from a supersaturated aqueous solution of methane, and molecular simulation using various force fields has provided valuable insights into this process. In this study, transition path sampling (TPS) simulations were performed to investigate the formation of methane hydrates under different conditions. The results revealed that amorphous structures are formed at temperatures below 260 K, while crystalline sI structures are formed at higher temperatures. The influence of the gas reservoir on supersaturation was also analyzed, and the findings contribute to a better understanding of the hydrate formation process.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Yogesh Shelke, Susana Marin -Aguilar, Fabrizio Camerin, Marjolein Dijkstra, Daniela J. Kraft
Summary: Colloidal molecules with anisotropic shapes and interactions have been utilized as model systems to understand the behavior of real molecules and develop materials with desired properties. By using electrostatic self-assembly, we have demonstrated that the shape of cubic particles plays a crucial role in achieving high yields of distinct colloidal molecules across a wide range of size ratios. Our protocol is not affected by the specific choice of colloidal particle material and can be extended to other templating particle shapes, significantly expanding the library of colloidal molecules that can be obtained with high yield and purity.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Physics, Multidisciplinary
W. Q. Boon, M. Dijkstra, R. van Roij
Summary: Chemical reactions responsible for charging of solids in water are investigated theoretically, and it is found that the equilibration of surface charge contains important information on reaction mechanisms and ion valency. A nonlinear differential equation is constructed to describe surface charging by combining Langmuir kinetics and Poisson-Boltzmann theory. The relaxation rates at late-time and short-time reveal information on charge valency and ad- or desorption mechanism, and an inflection point during equilibration distinguishes single-ion reactions from two-ion reactions, suggesting a Coulombic ion-surface interaction as an autocatalytic feedback mechanism.
PHYSICAL REVIEW LETTERS
(2023)
Article
Chemistry, Physical
Nuno A. M. Araujo, Liesbeth M. C. Janssen, Thomas Barois, Guido Boffetta, Itai Cohen, Alessandro Corbetta, Olivier Dauchot, Marjolein Dijkstra, William M. Durham, Audrey Dussutour, Simon Garnier, Hanneke Gelderblom, Ramin Golestanian, Lucio Isa, Gijsje H. Koenderink, Hartmut Loewen, Ralf Metzler, Marco Polin, C. Patrick Royall, Andela Saric, Anupam Sengupta, Cecile Sykes, Vito Trianni, Idan Tuval, Nicolas Vogel, Julia M. Yeomans, Iker Zuriguel, Alvaro Marin, Giorgio Volpe
Summary: Self-organisation is the spontaneous emergence of spatio-temporal structures and patterns from the interaction of smaller individual units. Confinement can mediate and control self-organisation by limiting the translational and rotational degrees of freedom, acting as a catalyst or inhibitor. By constraining the self-organisation process in soft-matter systems, confinement can actively steer the emergence or suppression of collective phenomena in space and time.
Article
Chemistry, Multidisciplinary
Willem Gispen, Gabriele M. Coli, Robin van Damme, C. Patrick Royall, Marjolein Dijkstra
Summary: Nucleation is crucial for crystal formation and is involved in various phenomena, yet many aspects of the nucleation process remain poorly understood. In this study, the excess of particles in a face-centered-cubic (fcc)-like environment compared to a hexagonal-close-packed (hcp)-like environment in a crystal nucleus of hard spheres is explained by the higher order structure in the fluid phase. Pentagonal bipyramids, known as inhibitors of crystal nucleation, transform into Siamese dodecahedra, which are closely similar to an fcc subunit, explaining the higher propensity for fcc growth in hard spheres. This crystallization and polymorph selection mechanism is generic for crystal nucleation from a dense, strongly correlated fluid phase.
Article
Chemistry, Physical
Yunhan Zhang, Giuliana Giunta, Haojun Liang, Marjolein Dijkstra
Summary: Leveraging the anisotropic shape of DNA-functionalized nanoparticles allows for shape-directed crystallization of various superlattice structures. Using molecular dynamics simulations, we observe the self-assembly of different phases (SC, pBCT, and d-pBCT) in a binary mixture of cubic gold nanoparticles functionalized with complementary DNA strands. We investigate the impact of DNA strand length, grafting density, and rigidity on the self-assembly behavior and find that longer and flexible DNA strands can induce a phase transformation from SC to pBCT due to increased entropy.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Computer Science, Artificial Intelligence
Simone Ciarella, Massimiliano Chiappini, Emanuele Boattini, Marjolein Dijkstra, Liesbeth M. C. Janssen
Summary: We present a machine-learning approach to predict the non-Markovian dynamics of supercooled liquids using static averaged quantities as input and output. Our method outperforms particle propensity-based techniques and is more applicable in experimental contexts where particle resolved information is not available. Our deep neural network can accurately predict the self intermediate scattering function of binary mixtures based on their static structure factor, and the model shows some transferability to lower temperatures or similar systems. Furthermore, we develop an evolutionary strategy that parameterizes the memory function of supercooled liquids as the sum of two stretched exponentials, corresponding to two dominant relaxation modes.
MACHINE LEARNING-SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Yogesh Shelke, Fabrizio Camerin, Susana Marin-Aguilar, Ruben W. Verweij, Marjolein Dijkstra, Daniela J. Kraft
Summary: In this study, flexible colloidal molecules with an in situ controllable motion range and bond directionality were created by assembling spherical particles onto cubes functionalized with complementary surface-mobile DNA. The size ratio of the sphere-to-cube varied to obtain colloidal molecules with different coordination numbers, and it was found that they exhibited a constrained range of motion above a critical size ratio. The confinement of the spheres on the surface of the cube and the probability to change facet were quantified, and temperature was identified as an extra control parameter to switch between full and constrained flexibility.
Article
Chemistry, Multidisciplinary
Aarya Prabhakaran, Zhiya Dang, Rohan Dhall, Fabrizio Camerin, Susana Marin-Aguilar, Balaji Dhanabalan, Andrea Castelli, Rosaria Brescia, Liberato Manna, Marjolein Dijkstra, Milena P. P. Arciniegas
Summary: Manipulating nano-objects through heating is an effective approach to modify the structure and optoelectronic properties of semiconducting materials. In this study, temperature-sensitive CsPbBr(3) perovskite nanoplatelets were synthesized and their structural evolution was observed at the nanoscale using in situ heating transmission electron microscopy. The morphological changes, starting from self-assembly into ribbons and ultimately forming randomly dispersed nanosheets on a substrate, were identified and supported by molecular dynamics simulations. The merging paths of the nanoplates within the ribbons were found to be influenced by the random orientation of the initial ribbons and the mobility of ligands, enabling the creation of structures with tunable emission ranging from blue to green.
Article
Chemistry, Multidisciplinary
Giuliana Giunta, Gerardo Campos-Villalobos, Marjolein Dijkstra
Summary: Colloidal nanoparticles can self-assemble into superstructures with distinctive properties. This study proposes a machine-learning approach to construct effective coarse-grained many-body interaction potentials for investigating the self-assembly behavior of complex colloidal systems. The key advantage of this method is its generality.
Article
Chemistry, Physical
Tor Sewring, Marjolein Dijkstra
Summary: Using Onsager-Straley's theory, this study investigates the cholesteric pitch of cellulose nanocrystal (CNC) suspensions. The research reveals that the twisting of chiral bundles significantly affects the helical twisting of the cholesteric phase. Moreover, the average particle length and length polydispersity have a substantial impact on strongly twisted bundles but minimal effects on weakly twisted ones.
JOURNAL OF CHEMICAL PHYSICS
(2023)
