We investigate how topological defects influence the excitonic behavior in (6,5) semiconducting single-walled carbon nanotubes. Our theoretical study demonstrates that topological defects, particularly the widely occurring Stone-Wales defect, can act as efficient traps for triplet excitons, characterized by significant zero-field splitting consistent with experimental data and a small singlet-triplet energy gap. Additionally, the weak electron-phonon coupling positions these defects as promising candidates for single-photon emission at telecom wavelengths (1.6 μm). These findings pave the way for enhancing the performance of carbon nanotube-based quantum light sources and optoelectronic devices.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1039/d4nr03904a | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Topologically reconfigurable nematic emulsions.
Proc Natl Acad Sci U S A
March 2025
School of Physics, University of Hyderabad, Hyderabad 500046, India.
In emulsions of multicomponent fluids, the dispersed phase forms tiny droplets in the continuous phase. In situ control and manipulation to achieve diversity in emulsion droplets for emerging applications is challenging. In a liquid crystal-based emulsion, the surface anchoring of the molecules at the isotropic fluid-liquid crystal interface introduces elastic distortions that result in anisotropic interparticle interactions, similar to electrostatic interactions between multipoles, which also lends a naming analogy as elastic dipoles, quadrupoles, and higher.
View Article and Find Full Text PDFInteger topological defects offer a methodology to quantify and classify active cell monolayers.
Nat Commun
March 2025
School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, China.
Monolayers of confluent elongated cells are frequently considered active nematics, featuring topological defects. In extensile systems, where cells extend further along their long axis, they can accumulate at defects and escape from defects. Nevertheless, collective dynamics surrounding integer defects remain insufficiently understood.
View Article and Find Full Text PDFHigher Structure of Chiral Symmetry.
Commun Math Phys
March 2025
Center for Cosmology and Particle Physics, New York University, New York, USA.
A recent development in our understanding of the theory of quantum fields is the fact that familiar gauge theories in spacetime dimensions greater than two can have non-invertible symmetries generated by topological defects. The hallmark of these non-invertible symmetries is that the fusion rule deviates from the usual group-like structure, and in particular the fusion coefficients take values in topological field theories (TFTs) rather than in mere numbers. In this paper we begin an exploration of the associativity structure of non-invertible symmetries in higher dimensions.
View Article and Find Full Text PDFLoop-extrusion machinery, comprising the cohesin complex and CCCTC-binding factor CTCF, organizes the interphase chromosomes into topologically associating domains (TADs) and loops, but acute depletion of components of this machinery results in variable transcriptional changes in different cell types, highlighting the complex relationship between chromatin organization and gene regulation. Here, we systematically investigated the role of 3D genome architecture in gene regulation in mouse embryonic stem cells under various perturbation conditions. We found that acute depletion of cohesin or CTCF disrupts the formation of TADs, but affects gene regulation in a gene-specific and context-dependent manner.
View Article and Find Full Text PDFAtomically Dispersed Catalytic Platinum Anti-Substitutions in Molybdenum Ditelluride.
J Am Chem Soc
March 2025
School of Materials Science and Engineering, Peking University, Beijing 100871, China.
Atomic defects, e.g., vacancies, substitutions, and dopants, play crucial roles in determining the functionalities of two-dimensional (2D) materials, including spin glass, single-photon emitters, and energy storage and conversion, due to the introduction of abnormal charge states and noncentrosymmetric distortion.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!