Article
Optics
Hengjiao Guo, Yabing Ji, Qing Liu, Tao Yang, Shunyong Hou, Jianping Yin
Summary: Engineering many-body systems of particles in lattices has attracted significant interest recently. This study proposes a three-dimensional electrostatic lattice consisting of square-patterned electrodes, which can effectively trap and evaporatively cool polar molecules. Additionally, different electrode patterns enable the creation of three-dimensional electric lattices with new topological geometries.
Article
Physics, Multidisciplinary
Wei-Lin Tu, Eun-Gook Moon, Kwan-Woo Lee, Warren E. Pickett, Hyun-Yong Lee
Summary: The application of an external magnetic field can trigger bosonic condensation, providing an alternative method to realize exotic phases of matter. The study investigates the effects of an applied magnetic field on Ba2NiO2(AgSe)2 and proposes a fermionic model to further explore its superconductivity. This research is important for understanding Bose-Einstein condensates and investigating the underlying mechanisms of quantum magnets.
COMMUNICATIONS PHYSICS
(2022)
Article
Physics, Multidisciplinary
T. Bland, E. Poli, C. Politi, L. Klaus, M. A. Norcia, F. Ferlaino, L. Santos, R. N. Bisset
Summary: A robust supersolid state can be formed in a two-dimensional system by directly evaporative cooling into the supersolid phase. The research provides a theoretical basis for the formation process of two-dimensional supersolids and defines a practical path to the formation of large two-dimensional supersolid arrays.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
Yi-Yin Zheng, Shan-Tong Chen, Zhi-Peng Huang, Shi-Xuan Dai, Bin Liu, Yong-Yao Li, Shu-Rong Wang
Summary: We studied the stability of zero-vorticity and vortex lattice quantum droplets described by a 2D GP equation, finding the stability areas for different numbers of sites and vorticities. The relationship between mu and N for stable LQDs may violate the VK criterion, and two types of vortex LQDs with the same number of sites were found to be degenerate, while zero-vorticity LQDs were not. The offsite-centered LQDs with zero-vorticity and vortex LQDs with S = 1 were heterogeneous.
FRONTIERS OF PHYSICS
(2021)
Article
Physics, Multidisciplinary
Giulio Biagioni, Nicole Antolini, Aitor Alana, Michele Modugno, Andrea Fioretti, Carlo Gabbanini, Luca Tanzi, Giovanni Modugno
Summary: Supersolids are a quantum phase of matter where the global phase and translational symmetries are spontaneously broken. By experiment and theory, it has been found that the phase transition of supersolids can be discontinuous or continuous, and the dimensional crossover is controlled by confinement and atom number.
Article
Chemistry, Multidisciplinary
Junyao Li, Xingxing Li, Jinlong Yang
Summary: This study proposes a chemical method to reversibly control the spin order of two-dimensional organometallic lattices by utilizing lactim-lactam tautomerization. By designing several 2D organometallic frameworks, the transition from antiferromagnetic to ferrimagnetic spin order is achieved through tautomerization on organic linkers. This transition also alters the materials' electronic structures and enhances the magnetic anisotropy energy.
Article
Physics, Condensed Matter
Oanh K. T. Nguyen, Cong T. Bach, Long D. Dang, Giang H. Bach
Summary: In this study, we investigate the disorder effect on ultracold atoms in an optical lattice by using the expanded Bose-Hubbard model and Quantum Monte Carlo simulation. We discover three additional crystal-like phases at commensurate densities, rho = 1/2, 1, and 3/2, in addition to the superfluid and Mott insulator phases observed in the bare soft-core boson model. In the presence of disorder, the superfluid and charge-density wave coexist in the sandwiched regions between the superfluid and solid orders around the commensurate densities. This observation is significant as it has not been previously revealed in other models of soft-core bosons.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Multidisciplinary Sciences
S. Al-Awfi
Summary: In this study, we theoretically demonstrate controllable two-dimensional surface optical lattices based on the evanescent electric field generated by the Hermite-Gaussian light beam. By considering the coupling of the lattice to quadrupole-active atomic transitions, we show that these topologies not only have high stability, but also deep optical potentials, allowing for dynamic trapping to be controlled by changing the design parameters of the optical construction. We expect that this study may contribute to providing another unique method for fabricating spatially complicated two-dimensional nanostructures.
JOURNAL OF TAIBAH UNIVERSITY FOR SCIENCE
(2023)
Article
Chemistry, Inorganic & Nuclear
Yanhong Wang, Shuang Li, Yaling Dou, Hui Li, Hongcheng Lu
Summary: In this study, two novel layered magnetic fluorooxoborates with triangular lattices have been successfully synthesized and characterized. The compounds exhibit no magnetic long-range ordering transition at low temperatures and show high magnetic saturation values. Furthermore, the study suggests a promising method for experimentally realizing specific magnetic lattices using directed synthesis.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Yanhong Wang, Shuang Li, Yaling Dou, Hui Li, Hongcheng Lu
Summary: This study focuses on the experimental exploration of frustrated magnetic systems, particularly triangular lattices, for potential application in quantum computing. Through directed synthesis using a triangular unit of the BO3 anion group, two novel layered magnetic fluorooxoborates with triangular lattices have been successfully synthesized and characterized. The magnetic properties and structural features of the compounds have been investigated, showing potential for further understanding the underlying physics of frustrated magnetic systems.
DALTON TRANSACTIONS
(2023)
Article
Physics, Multidisciplinary
Junyu Lin, Junyu He, Mucan Jin, Guanghua Chen, Dajun Wang
Summary: This study characterizes the coherence between nuclear spin levels of ultracold ground-state sodium-rubidium molecules in a 3D optical lattice, achieving a maximum nuclear spin coherence time and ultrahigh spectroscopic resolution by compensating for main sources of decoherence.
PHYSICAL REVIEW LETTERS
(2022)
Article
Mathematics, Applied
Zhiming Chen, Jianhua Zeng
Summary: This study investigates the formation, properties, and stability of two-dimensional localized gap modes in coherent atomic systems loaded on optical lattices with EIT. By using the nonlinear Schrodinger equation, the research provides insights into soliton dynamics and lays the groundwork for applications such as optical communications and quantum information processing.
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2021)
Article
Materials Science, Multidisciplinary
Zhoutao Lei, Linhu Li, Yuangang Deng
Summary: This study proposes a method to implement synthetic magnetic flux through two-dimensional topological boundary states in a bilayer optical lattice. By adjusting the two-photon detuning and effective Zeeman shift, Chern insulator, Dirac semimetals, and second-order topological phase (SOTP) are generated. These topological phases can be well characterized by the energy gap of the bulk, the Wilson loop spectra, and the spin textures. The scheme provides a platform for emerging exotic topological boundary states.
Article
Chemistry, Multidisciplinary
Ziyi Wang, Xu Chen, Yipeng Song, Zhipeng Du, Yang Zhou, Minjuan Li, Weiqi Huang, Qianting Xu, Yanqiang Li, Sangen Zhao, Junhua Luo
Summary: This work reports the observation of heat switching birefringence in a 2D layered hybrid halide perovskite crystal. Structure analyses reveal the impact of heat-induced structure transition on birefringence. This discovery may contribute to the development of stimuli-responsive polarization optical devices.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Xilong Xu, Ting Zhang, Ying Dai, Baibiao Huang, Yandong Ma
Summary: In this study, a novel mechanism for electro-mechanical coupling is proposed, which enables reversible and nonvolatile electric field switching of the dimensions of a 2D lattice through the mediated strength of interlayer interactions in ferroelectric bilayer systems. The validity of this mechanism is demonstrated in a series of real bilayer materials through first-principles calculations. The interface differences due to polarization play a crucial role in realizing such nonvolatile electro-mechanical coupling, and the underlying physical origin is discussed. These explored phenomena and insights offer a novel avenue for the highly desired nonvolatile electric field control of mechanical strain.
NANOSCALE HORIZONS
(2023)
Article
Materials Science, Multidisciplinary
Youjiang Xu, Irakli Titvinidze, Walter Hofstetter
Summary: We have demonstrated the ubiquity of invisible bands associated with zeros of the single-particle Green's function at topological interfaces of two-dimensional Chern insulators, which are dual to the chiral edge/domain-wall modes. This was achieved by studying the domain walls of a repulsive Hubbard model with a topological flat band using real-space dynamical mean-field theory. Our numerical results further revealed that the chiral modes are split into branches due to interaction, with these branches connected by invisible flat bands. This work provides valuable insights into interacting topological systems.
Article
Materials Science, Multidisciplinary
Morad Ebrahimkhas, Goetz S. Uhrig, Walter Hofstetter, Mohsen Hafez-Torbati
Summary: In this paper, the existence of an antiferromagnetic Chern insulator (AFCI) in a square-lattice model is demonstrated. The study shows that the AFCI can be formed due to the spin-orbit coupling and strong electronic correlation, which suggests the generic consequence of these factors beyond a specific model or lattice structure. The AFCI has potential applications for a strong magnetic blueshift of the charge gap below the Neel temperature and for realizing the quantum anomalous Hall effect at higher temperatures.
Article
Materials Science, Multidisciplinary
Irakli Titvinidze, Julian Legendre, Karyn Le Hur, Walter Hofstetter
Summary: In this study, we investigated the Hubbard model with time-reversal-invariant flux, spin-orbit coupling, and position-dependent onsite energies on the kagome lattice using numerical and analytical methods. By employing real-space dynamical mean-field theory and other approaches, we obtained a rich phase diagram and explored the topological and magnetic properties of the system.
Article
Optics
Mathieu Barbier, Henrik Luetjeharms, Walter Hofstetter
Summary: Using trapped Rydberg-excited p states in an optical lattice, the ground-state phase diagram and different regimes of an extended two-component Bose-Hubbard model are studied. The anisotropic interaction is found to be more advantageous for observing supersolid phases compared to the isotropic case.
Article
Optics
Mathieu Barbier, Simon Hollerith, Walter Hofstetter
Summary: This work proposes the use of bosonic quantum gases dressed with molecular bound states in Rydberg interaction potentials to observe novel phases of matter in extended Hubbard models. It studies the molecular Rabi coupling with respect to the effective principal quantum number and trapping frequency of ground-state atoms, as well as the resulting dressed interaction strength. Additionally, a two-color excitation scheme is proposed to enhance dressed interaction and cancel ac Stark shifts.
Article
Materials Science, Multidisciplinary
Irakli Titvinidze, Julian Legendre, Maarten Grothus, Bernhard Irsigler, Karyn Le Hur, Walter Hofstetter
Summary: The study explores the topological properties of a spin-orbit coupled tight-binding model with flux on the kagome lattice, which includes a Z(2) topological insulator, inequivalent sites, flat band, and topological dispersive energy bands. It demonstrates the stability of the topological phase against spin-flip processes and different types of on-site potentials, as well as the possibility of different on-site energies within a unit cell.
Article
Materials Science, Multidisciplinary
Bernhard Irsigler, Tobias Grass, Jun-Hui Zheng, Mathieu Barbier, Walter Hofstetter
Summary: By studying the dynamical mean-field theory, we found that the Chern numbers of topological phases become trivial when interactions lead to insulating behavior. We also evaluated the topological properties of quasiparticle bands and so-called blind bands to gain a deeper understanding of the Weyl-semimetal-to-Mott-insulator topological phase transition. Additionally, we considered a system with an open boundary along one spatial direction to study correlation effects of surface states.
Article
Materials Science, Multidisciplinary
Morad Ebrahimkhas, Mohsen Hafez-Torbati, Walter Hofstetter
Summary: This study investigates the influence of lattice symmetry on the emergence of antiferromagnetic quantum Hall states in systems with nontrivial topological bands. By extending the spinful Harper-Hofstadter model with next-nearest-neighbor hopping, a quantum Hall insulator with Chern number C = 2 is realized. The phase diagram shows the presence of a C = 1 stripe antiferromagnetic quantum Hall insulator for large next-nearest-neighbor hopping, but no equivalent Ned antiferromagnetic quantum Hall insulator for small next-nearest-neighbor hopping. It is discussed that a C = 1 antiferromagnetic quantum Hall insulator can only emerge when the effect of the spin-flip transformation cannot be compensated by a space-group operation.
Article
Physics, Multidisciplinary
Bernhard Irsigler, Jun-Hui Zheng, Fabian Grusdt, Walter Hofstetter
PHYSICAL REVIEW RESEARCH
(2020)
Article
Materials Science, Multidisciplinary
Jaromir Panas, Bernhard Irsigler, Jun-Hui Zheng, Walter Hofstetter
Article
Materials Science, Multidisciplinary
Mohsen Hafez-Torbati, Jun-Hui Zheng, Bernhard Irsigler, Walter Hofstetter
Article
Optics
Urs Gebert, Bernhard Irsigler, Walter Hofstetter
Article
Optics
Jun-Hui Zheng, Bernhard Irsigler, Lijia Jiang, Christof Weitenberg, Walter Hofstetter
Article
Optics
Bernhard Irsigler, Jun-Hui Zheng, Walter Hofstetter
Article
Materials Science, Multidisciplinary
Mohsen Hafez-Torbati, Walter Hofstetter