Risultati di ricerca
15 mag 2024 · Symmetry breaking is prevalent in nature and provides distinctive access to hierarchical structures for artificial materials. However, it is rarely explored in two-dimensional (2D) entities, especially for lateral asymmetry. Herein, we describe a unique symmetry breaking process in surface-initiated 2D living crystallization-driven self-assembly. The 2D epitaxial growth occurs only at one ...
16 mag 2024 · View a PDF of the paper titled Chiral symmetry breaking in the pseudo-quantum electrodynamics with non-Abelian four-fermion interactions, by Qiao Yang and 2 other authors View PDF HTML (experimental) Abstract: In the context of 2+1 dimensional Dirac materials, we consider electromagnetic interactions alongside a type of spin-dependent Hubbard interaction.
5 giorni fa · Under this premise, it is imperative to introduce structural symmetry breaking to realize plasmon-enhanced even-order optical nonlinearity. Here, we fabricate a series of nanoparticle dimers each composed of two gold nanospheres with different diameters and subsequently investigate their structural asymmetry dependent linear and nonlinear optical properties.
13 mag 2024 · Over the past decade, many 2D SHG materials have been synthesized to have broken inversion symmetry by stacking heterostructures, twisted moire structures, dislocated nanoplates, spiral nanosheets, antiferromagnetic order, and strain. In this review, we focus on the recent progress in breaking inversion and rotational symmetries in out-of-plane ...
16 mag 2024 · Over the past nine years, dibenzo[b,d]thiophene sulfone (DBS) has been the preferred choice for the acceptor unit. Despite extensive exploration of alternative structures as potential replacements for DBS, a superior substitute remains elusive. In this study, a symmetry-breaking strategy was employed on DBS to develop a novel acceptor unit ...
23 mag 2024 · Soil is a critical component of terrestrial ecosystems, directly influencing global biogeochemical cycles. Despite its importance, the complex architecture of soil pores and their impact on greenhouse gas emissions remain poorly understood. This perspective aims to address this gap by applying symmetry and symmetry-breaking concepts through fractal geometry to elucidate the structural and ...
13 mag 2024 · Another intriguing issue is the time-reversal symmetry breaking in the superconducting state. The observation of a non-zero polar Kerr effect and two transitions in the specific heat suggested ...
