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Three-dimensional matter wave soliton transformation between different optical lattices in a cold Rydberg atomic system.
Sci Rep
January 2025
Key Laboratory of Optoelectronic Sensing and Intelligent Control, Hubei University of Science and Technology, Xianning, 437100, China.
We present a novel approach to realize three-dimensional (3D) matter wave solitons (MWSs) transformation between different optical potential wells by manipulating their depths and centers. The 3D MWSs are obtained by the square operator method, and transformed to other types (elliptical/ring/necklace) by performing time evolution with the split-step Fourier method. The effectiveness and reliability of our approach is demonstrated by comparing the transformed solitons with those obtained iteratively using the square operator method.
View Article and Find Full Text PDFSpontaneous emergence of straintronics effects and striped stacking domains in untwisted three-layer epitaxial graphene.
Proc Natl Acad Sci U S A
December 2024
Tandon School of Engineering, Chemical and Biomolecular Engineering, New York University, Brooklyn, NY 11201.
Emergent electronic phenomena, from superconductivity to ferroelectricity, magnetism, and correlated many-body band gaps, have been observed in domains created by stacking and twisting atomic layers of Van der Waals materials. In graphene, emergent properties have been observed in ABC stacking domains obtained by exfoliation followed by expert mechanical twisting and alignment with the desired orientation, a process very challenging and nonscalable. Here, conductive atomic force microscopy shows in untwisted epitaxial graphene grown on SiC the surprising presence of striped domains with dissimilar conductance, a contrast that demonstrates the presence of ABA and ABC domains since it matches exactly the conductivity difference observed in ABA/ABC domains in twisted exfoliated graphene and calculated by density functional theory.
View Article and Find Full Text PDFArticle Synopsis
- - The study focuses on how laser linewidth affects the dynamics and pattern formation in Rydberg noise-dressed Bose-Einstein condensates (RnD BECs).
- - It reveals that a uniform matter wave can change into different self-organized patterns based on variations in laser linewidth, control field intensity, and atomic density.
- - The research identifies stable nonlocal matter-wave solitons, vortices, and soliton molecules emerging at particular laser linewidth settings.
Manipulative Single Electric Dipole with Spontaneous Translational Symmetry Breaking in a Two-Dimensional Crystal.
Nano Lett
November 2024
State Key Laboratory of Surface Physics, Institute for Nanoelectronic Devices and Quantum Computing, and Department of Physics, Fudan University, Shanghai 200438, China.
It is widely acknowledged that quantum entities with minimal mass cannot undergo spontaneous symmetry breaking due to strong quantum fluctuations. Here, we report the discovery of a positionally settled single electric dipole that can be manipulated and electrically polarized in a monolayer CoCl-graphite heterostructure, which demonstrates an unprecedented example of spontaneous lattice-translational-symmetry breaking. Scanning tunneling microscopy and atomic force microscopy show that the solitons are intrinsic paraelectric dipoles driven by synchronous charge-lattice distortion around individual CoCl octahedrons.
View Article and Find Full Text PDFCrystal structure of the incommensurate modulated high-pressure phase of the potassium guaninate monohydrate.
Acta Crystallogr B Struct Sci Cryst Eng Mater
December 2024
V. S. Sobolev Institute of Geology and Mineralogy SB RAS, Koptyug Avenue 3, Novosibirsk 630090, Russian Federation.
The crystal structure of the incommensurate modulated phase of potassium guaninate monohydrate has been solved on the basis of high-pressure single-crystal X-ray diffraction data. The modulated structure was described as a `mosaic' sequence of three different local configurations of two neighbouring guaninate rings. In contrast to known examples of incommensurate modulated organic compounds, the modulation functions of all atoms are discontinuous.
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