Article
Materials Science, Multidisciplinary
S. T. Chui, Meizhen Huang, Zefei Wu, Ning Wang
Summary: We investigated the properties of quantum electron solids of different symmetries in two-dimensional double-layer systems. We found that both hexagonal and square lattices are stable, but only the hexagonal lattice is stable in the case of pure Coulomb interaction. The square lattice will replace the hexagonal lattice as the temperature increases.
Article
Materials Science, Multidisciplinary
Ankush Girdhar, Vinod Ashokan, Rajesh O. Sharma, N. D. Drummond, K. N. Pathak
Summary: We use the variational quantum Monte Carlo (VMC) method to study the dependence of ground-state properties of quasi-one-dimensional paramagnetic electron fluids on wire-width (b) and electron-density (rs). The crossover of the dominant peak in the static structure factor from k = 2kF to k = 4kF is investigated, and it is found that the crossover occurs as the wire width decreases for a fixed electron density. The study suggests that the crossover is due to the interplay of both rs and b < rs. The wire-width correlation effect is reflected in the peak height of the charge and spin structure factors, and the wire-width dependence of the electron correlation energy and the Tomonaga-Luttinger parameter K rho is significant.
Review
Crystallography
Niccolo Traverso Ziani, Fabio Cavaliere, Karina Guerrero Becerra, Maura Sassetti
Summary: This review discusses the simplest structural transition of Wigner crystallization in electronic systems and three recent experiments on one-dimensional Wigner molecules. The Luttinger liquid theory and basic properties of carbon nanotubes are briefly addressed, followed by discussions on the relevant properties of Wigner molecules and descriptions of the experiments. Key physical points include the suppression of energy scales related to the spin and isospin sectors, and the unique electron density structure in the Wigner molecule regime.
Article
Physics, Multidisciplinary
Alex Gomez Salvador, Clemens Kuhlenkamp, Livio Ciorciaro, Michael Knap, Atac Imamoglu
Summary: This study analyzes the exciton band structure arising from the periodic modulation of the valley Zeeman effect and proposes detection schemes for magnetic order in quantum moire magnets and semiclassical moire magnets.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Fluids & Plasmas
Eu A. Gaiduk, Yu D. Fomin, E. N. Tsiok, V. N. Ryzhov
Summary: The anomalous behavior of a two-dimensional system of Hertzian disks with exponent alpha = 7/2 has been studied using the method of molecular dynamics. Waterlike density and diffusion anomalies have been found in the reentrant melting regions. The density anomaly has been observed not only in the liquid and hexatic but also in the solid phase.
Article
Physics, Multidisciplinary
Xiong Huang, Tianmeng Wang, Shengnan Miao, Chong Wang, Zhipeng Li, Zhen Lian, Takashi Taniguchi, Kenji Watanabe, Satoshi Okamoto, Di Xiao, Su-Fei Shi, Yong-Tao Cui
Summary: Correlated insulating states at fractional fillings of moire minibands have been observed in angle-aligned WS2/WSe2 hetero-bilayers, indicating a surprisingly strong and long-range interaction beyond the nearest neighbors.
Article
Nanoscience & Nanotechnology
Jonah Waissman, Laurel E. Anderson, Artem Talanov, Zhongying Yan, Young J. Shin, Danial H. Najafabadi, Mehdi Rezaee, Xiaowen Feng, Daniel G. Nocera, Takashi Taniguchi, Kenji Watanabe, Brian Skinner, Konstantin A. Matveev, Philip Kim
Summary: The combination of reduced dimensionality, strong interactions, and topology in low-dimensional systems leads to many-body quantum phenomena. Thermal transport serves as a discriminating probe in quantum materials and devices, with the need for experimental methods to isolate electronic contributions. Measurements using noise thermometers and linear and nonlinear thermal transport reveal signatures of energy transport mediated by long-range interactions in one-dimensional electron systems.
NATURE NANOTECHNOLOGY
(2022)
Article
Physics, Multidisciplinary
Jun Ding, Ding-Fu Shao, Ming Li, Li-Wei Wen, Evgeny Y. Tsymbal
Summary: The recent discovery of two-dimensional ferroelectric materials has opened up a new route for realizing tunnel junctions with new functionalities and nanoscale dimensions. Using first-principles calculations, it has been demonstrated that bilayer In2X3 barriers exhibit stable ferroelectric and antiferroelectric states separated by sizable energy barriers, enabling nonvolatile switching between these states. Quantum-mechanical modeling predicts giant tunneling electroresistance effects and multiple nonvolatile resistance states in 2D AFTJs, suggesting the potential for high-density nanoscale memory devices.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Rui-xue Guo, Jia-jian Li, Bao-quan Ai
Summary: Researchers conducted a numerical study and found that increasing temperature or shape parameter leads to a transition from solid to liquid in deformable particle systems. The solid-liquid transition occurs in two steps, with a continuous solid-hexatic transition followed by a first-order hexatic-liquid transition. Observations of topological defects supported these conclusions. The work presents the complete phase diagram of two-dimensional deformable particle systems and offers insights into the solid-liquid transition in soft matter.
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
(2023)
Article
Nanoscience & Nanotechnology
Vo Van Hoang
Summary: The melting of two-dimensional hexagonal SiC nanoribbons was studied using molecular dynamics simulations. It was found that in the initial stage of melting, liquid-like atoms occur first in the edge region, and further heating leads to the homogeneous occurrence and growth of liquid-like atoms throughout the models.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2022)
Article
Optics
M. Amin, M. A. Walton
Summary: The study shows how to construct a general hybrid quantum-classical bracket and the rules it follows. It is demonstrated that the hybrid bracket will obey the Jacobi identity and the Leibniz rule, as long as the composition product is associative. The proposed scheme suggests that quantum backreaction manifests as quantum-dependent terms in classical equations of motion.
Article
Physics, Multidisciplinary
I. S. Kalinichenko
Summary: This study investigates the energy of a two-dimensional electron crystal in the low-density limit, and obtains the first correction to the electrostatic energy using numerical integration.
RUSSIAN PHYSICS JOURNAL
(2022)
Article
Physics, Multidisciplinary
Gabriel Cardoso, Jean-Marie Stephan, Alexander G. Abanov
Summary: In the study of two-dimensional one-component plasma, we found through numerical simulations that at sufficiently low temperatures, but still in the liquid phase, the density in the droplet exhibits oscillations near the boundary. These oscillations decay and have a certain period, which can be explained by the Wigner crystallization near the boundary, where the crystal gradually melts with increasing distance to the boundary.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2021)
Article
Mechanics
Luca Galantucci, Michele Sciacca, Nick G. Parker, Andrew W. Baggaley, Carlo F. Barenghi
Summary: This article discusses the leapfrogging of coaxial vortex rings in ultra-cold atomic gases and quantum fluids. Using the two-dimensional point vortex model and solving the Gross-Pitaevskii equation for a Bose-Einstein condensate, it was found that the dynamics of leapfrogging in narrow channels is richer than in unbounded domains, with new regimes identified. The differences between classical and quantum vortex leapfrogging were also discussed, especially when the quantum healing length and compressibility effects become significant.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Chemistry, Physical
Minglei Sun, Yi Luo, Yuan Yan, Udo Schwingenschlogl
Summary: Using evolutionary search and first-principles calculations, we predicted the structural stability of B8Si4, B8Ge4, B8Sn4, and B8Pb4, finding differences in properties such as electronic transport, band gap size, and mobility. These materials exhibit variations in characteristics like hole mobility and band gap semiconductor properties, with B8Sn4 showing particularly high mobility exceeding that of graphene.
CHEMISTRY OF MATERIALS
(2021)
