Article
Materials Science, Multidisciplinary
Jia-Jia Luo, Han Pu, Xi -Wen Guan
Summary: In this study, a rigorous understanding of the one-dimensional repulsive Fermi-Hubbard model is provided based on the solutions to the thermodynamic Bethe ansatz equations. The fractional excitations, universal properties, and asymptotic of correlation functions in various phases are calculated and analyzed. The interaction-driven phase transition and its relationship with the contact susceptibilities and variations of density, magnetization, and entropy are also investigated. Furthermore, a quantum cooling scheme based on the interaction-driven refrigeration cycle is proposed as an application of these concepts, which are applicable to higher-dimensional systems.
Article
Optics
Kuan-Yu Li, Yicheng Zhang, Kangning Yang, Kuan-Yu Lin, Sarang Gopalakrishnan, Marcos Rigol, Benjamin L. Lev
Summary: We investigate the impact of tunable integrability-breaking dipole-dipole interactions on the equilibrium states of 1D Bose gases of dysprosium at low temperatures. Our experimental results show that in the strongly correlated Tonks-Girardeau regime, rapidity and momentum distributions are unaffected by the dipolar interactions. However, significant changes occur when the strength of the contact interactions is decreased. We propose a model that captures the main experimental observations by considering the system as an array of 1D gases with only contact interactions, dressed by the contribution of the short-range part of the dipolar interactions.
Article
Physics, Multidisciplinary
Shah Saad Alam, Timothy Skaras, Li Yang, Han Pu
Summary: Dynamical fermionization phenomenon in Tonks-Girardeau gases shows that the momentum density profile approaches that of an ideal Fermi gas after being released from harmonic confinement. By extending the study to a one-dimensional spinor gas of arbitrary spin in a strongly interacting regime, it is analytically proven that the total momentum distribution resembles that of a spinless ideal Fermi gas and each spin component maintains the shape of the initial real space density profile.
PHYSICAL REVIEW LETTERS
(2021)
Article
Chemistry, Physical
Linghai Zhang, Xu Zhang, Gang Lu
Summary: The IV monochalcogenides, resembling black phosphorus, have attracted significant attention for their potential applications in twistronics. This study reveals the structural, optoelectronic, and excitonic properties of twisted SnS bilayers, showing the existence of one-dimensional and anisotropic moire ' excitons that can be tuned by twist angle and interlayer distance.
CHEMISTRY OF MATERIALS
(2021)
Article
Optics
Manuele Tettamanti, Alberto Parola
Summary: The study investigates the existence and stability of solitonic states in one-dimensional repulsive Bose-Einstein condensates by considering the limit of infinite repulsion. A class of stationary, shape-invariant states propagating at constant velocity are found and compared to the known solution of the Gross-Pitaevskii equation. The results show that typical nonlinear features can be recovered in a purely linear theory when the full many-body physics is correctly taken into account.
Article
Optics
Francois Riggio, Yannis Brun, Dragi Karevski, Alexandre Faribault
Summary: The local-density approximation (LDA) is a commonly used technique in modeling quantum gases, but it has large approximation errors in the ground state of one-dimensional Bose gases. In this study, we propose a method to correct LDA by treating the local density as a functional of the trapping potential and applying a gradient expansion. The correction coefficients are determined through perturbative calculations and can be evaluated numerically or analytically. The corrected LDA shows significant improvement compared to the zeroth-order LDA.
Review
Physics, Multidisciplinary
Stefania De Curtis, Daniele Dominici
Summary: Spin-1 resonances are naturally present in composite Higgs frameworks. This paper discusses how to parameterize a single additional heavy triplet model independently, before moving on to more realistic models with a larger number of spin-1 resonances. In these cases, finite width and interference effects can heavily impact the bounds extracted from the data.
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS
(2022)
Article
Materials Science, Multidisciplinary
Ganesan Senthil Murugan, Suheon Lee, C. Wang, H. Luetkens, Kwang-Yong Choi, Raman Sankar
Summary: We combine μSR technique with thermodynamic measurements to explore the spin dynamics of one-dimensional S = 1/2 antiferromagnetic double chain KNaCuP2O7. Results show that the high-temperature diffusive spin transport turns into ballistic behavior below 30K. In addition, longitudinal-field μSR varies hardly with an external magnetic field.
Article
Chemistry, Physical
Shankara S. Kalanur, Young Jae Lee, Hyungtak Seo, Bruno G. Pollet
Summary: This study investigates the introduction of hole trap states in bismuth vanadate (BiVO4) by tantalum (Ta) doping, which leads to enhanced photoelectrochemical (PEC) water-splitting activity. The doping of Ta alters the structure and chemical surroundings of BiVO4, forming hole trap states and causing lattice distortions. The photocurrent is significantly increased to 4.2 mA cm(-2) with an efficiency of 96.7%. DFT calculations confirm the decrease in optical band gap and the activation of hole trap states with the contribution of Ta, increasing charge separation and carrier density.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Multidisciplinary Sciences
Shunning Li, Zhefeng Chen, Zhi Wang, Mouyi Weng, Jianyuan Li, Mingzheng Zhang, Jing Lu, Kang Xu, Feng Pan
Summary: In recent decades, there has been exponential growth in the discovery of low-dimensional materials (LDMs) due to advances in computational techniques. The success of two-dimensional compounds has led to extensive research on one-dimensional (1D) atomic chains. In this study, the authors introduce a methodology based on graph theory for the topological classification of structural blocks in bulk crystals, resulting in the identification and categorization of exfoliable 1D atomic chains into different chemical families. The authors reveal a subtle interplay between prototypical 1D structural motifs and their chemical space, and explore the self-passivation mechanism and the dependence of electronic band gap on the cationic percolation network formed by connections between structure units. This graph-theory-based formalism provides insights for the future design of LDMs.
NATIONAL SCIENCE REVIEW
(2022)
Article
Materials Science, Multidisciplinary
Rebecca Kraus, Titas Chanda, Jakub Zakrzewski, Giovanna Morigi
Summary: In this article, a theoretical analysis of the phase diagram of a quantum gas of bosons interacting via repulsive dipolar interactions is conducted. Numerical techniques are used to evaluate the phase diagram for unit density, revealing a significant impact of correlated tunneling on the parameter range of the topological insulator phase.
Article
Physics, Mathematical
David Gontier, Salma Lahbabi, Abdallah Maichine
Summary: In this study, Density Functional Theory models for translationally invariant systems were investigated, showing modifications to energy terms and deriving reduced equations in remaining directions. It was demonstrated that perfect screening exists in the Thomas-Fermi model, with decay estimates provided for electronic density away from the slab. The Pauli principle is replaced by a penalization term in Kohn-Sham models, and properties of the minimizer in the reduced Hartree-Fock model were elucidated.
COMMUNICATIONS IN MATHEMATICAL PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Sukhito Teh, Horng-Tay Jeng
Summary: This study investigates the lattice structures, electronic properties, and magnetic properties of nitride MXenes using first-principles calculations. It reveals that these materials exhibit orbital ordering and magnetoelectric coupling effects. Notably, Cr2NF2 is a ferroelastic material and Mo8N4F7O can switch between different phases by applying external strain or electric field. These findings suggest that nitride MXenes hold promise as 2D multiferroic materials.
Article
Physics, Fluids & Plasmas
S. K. Adhikari
Summary: The study focuses on the formation of spin-1 symbiotic spinor solitons in a hyperfine spin F = 1 ferromagnetic Bose-Einstein condensate, showing that quasi-1D and quasi-2D solitons exhibit different spatial density structures.
Article
Optics
Asaad R. Sakhel, William J. Mullin, Roger R. Sakhel
Summary: This study investigates the fluid insulator transition in one-dimensional disordered bosons. The behavior of the bosons is studied under changes in the average particle number and temperature. The width of path fluctuations increases with decreasing repulsion between bosons and the gain in mobility. The compressibility shows fluid behavior at lower gamma values and a proposed Bose-glass phase at higher gamma values.
