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Centrality dependence of strange particle production in Pb-Pb collisions at (Formula presented)

2026-10-22T11:13:24Z

Title: Centrality dependence of strange particle production in Pb-Pb collisions at (Formula presented) Authors: Bailung, Yoshini; Behera, Debadatta; Goswami, Kangkan Abstract: The centrality dependence of strange (KS0, Λ+ Λ) and multistrange (Ξ−+ Ξ+, Ω−+ Ω+) hadron production is measured by ALICE in the Large Hadron Collider (LHC) lead-lead (Pb-Pb) collisions at a center-of-mass energy per nucleon pair √sNN = 5.02 TeV, using the full dataset collected during the LHC Run 2 campaign in the years 2015 and 2018. This is the largest heavy-ion dataset analyzed to date at the LHC, and it allows for the extraction of transverse momentum (pT) spectra and pT-integrated yields with unprecedented precision, over a broad range of charged particle multiplicity densities (〈dNch/dη〉|η|<0.5), probing regions where smaller collision system (pp and p-Pb) results are also available. The pT spectra evolve with centrality, featuring higher 〈pT〉 in central events for all particles. The Λ/KS0 ratio exhibits the distinctive baryon-to-meson enhancement in the intermediate pT region, with a maximum which is shifted to larger pT for more central collisions. The hadron-to-pion yield ratios are presented as a function of 〈dNch/dη〉|η|<0.5 and compared to results from different collision systems and energies. A smooth connection from pp to Pb-Pb is observed, thus demonstrating that collision system or energy do not play a role in the multiplicity evolution of this observable. The previously reported enhancement of strangeness production in the multiplicity range probed in pp and p-Pb collisions saturates in the multiplicity range of Pb-Pb data. These results constitute a key test bench for theoretical models and a first comparison to the EPOS 4 generator is presented. © 2026 CERN, for the ALICE Collaboration

Multidimensional Optoelectronic Neuromorphic Vision Using Anisotropic Ferroelectric Heterostructures

2026-10-15T13:19:56Z

Title: Multidimensional Optoelectronic Neuromorphic Vision Using Anisotropic Ferroelectric Heterostructures Authors: Kumari, Manju (58451686700) Abstract: Integrating diverse optical functionalities, including ultraviolet-visible multispectral and polarization-resolved sensing, offers a pathway toward neuromorphic visual systems that operate beyond human-centric limits. Conventional machine vision systems lack access to additional optical dimensions, such as ultraviolet and polarization, which encode critical information for robust perception in complex environments. However, integrating these functionalities into a single device remains challenging. Here, a WS2/α-In2Se3 ferroelectric van der Waals heterostructure is developed that enables simultaneous multispectral (365–660 nm) and polarization-resolved sensing, exhibiting a high dichroic ratio of ∼9.7. The device demonstrates synaptic behaviors, including paired-pulse facilitation of up to ∼142%, and short-term-to-long-term memory transition. These anisotropic in-memory synaptic characteristics arise from the interplay between crystal anisotropy, ferroelectric polarization dynamics, and light-induced interfacial carrier modulation. Photo-induced memory current-based real-time multispectral and polarization-resolved imaging enables spatial reconstruction across both spectral and polarization domains. Furthermore, a neural-network-based RGB+UV multimodal inference framework achieves 93% recognition accuracy, while a polarization-encoded, synaptic-weight-driven edge extraction approach reaches 97% accuracy. These results establish a device-level platform for multidimensional optoelectronic neuromorphic vision, offering new opportunities for advanced intelligent sensing systems. © 2026 Wiley-VCH GmbH.

Polarization dependent Raman scattering in WS2: revealing anisotropic Fano resonance involving acoustic phonons

2026-10-15T13:19:55Z

Title: Polarization dependent Raman scattering in WS2: revealing anisotropic Fano resonance involving acoustic phonons Authors: Rath, Deb Kumar (58534978300); Singh, Sharmistha (60432596200); Kumar, Shivam (59711163000); Chondath, Subin Kaladi (57205377848); Bansal, Love (57787230000); Sahu, Bhumika (58193644600); Ahlawat, Nikita (58752130500); Kumar, Rajesh (58070351300) Abstract: The quantum interference between discrete phonon modes and the electronic continuum provides a powerful means to understand various physical phenomena, like the electron–phonon coupling in semiconductors at the microscopic level. In this study, multi-layered WS2 flakes grown via chemical vapor deposition have been investigated to establish the actual origin of their low-frequency Raman modes. The longitudinal acoustic or LA phonon mode has been found to exhibit pronounced asymmetric line shapes originating due to Fano resonance, enabling precise quantification of the electron–phonon interaction strength at low energy phonons. Furthermore polarization-dependent Raman measurements reveal a polarization dependent variation in the Fano parameter establishing the anisotropic nature of the quantum interference. Further investigation and theoretical modeling have been used to understand the origin of this anisotropy which is present due to directional dependence of the excitonic/electronic states within the WS2 Brillouin zone. This study demonstrates how anisotropic electron–phonon coupling governs the interplay between electronic continua and discrete vibrational modes. This thorough investigation reveals the intricate relationships in 2D materials like WS2, opening new avenues for utilising polarisation to control quantum interference in layered semiconductors. This journal is © the Owner Societies, 2026.

Synergistic impact of carbon integration on the multifaceted characteristics of greenly nanoscale engineered NiO@TC NPs

2026-10-15T13:19:55Z

Title: Synergistic impact of carbon integration on the multifaceted characteristics of greenly nanoscale engineered NiO@TC NPs Authors: Rambadey, Omkar V. (57223122949); Sagdeo, Pankaj R. (10042900700) Abstract: This article presents a systematic investigation on the multifaceted characteristics of carbon-integrated nickel oxide (NiO@TC) nanoparticles (NPs) fabricated by Tinospora cordifolia (TC) mediated self-combustion technique and, the findings are fairly compared with bare NiO NPs synthesized via co-precipitation route. TGA/DTA, PXRD, Rietveld, DLS, BET, FTIR, Raman, HRTEM, CHNS, and XPS analyses revealed fabrication of highly stable-mesoporous NiO@TC NPs (∼11 (±3) nm) and bare NiO NPs (∼7 (±1) nm) in the Fm3¯m symmetry. NiO@TC NPs displayed extraordinary absorption of light in the 275–450 nm band. NiO@TC NPs exhibited narrowed indirect bandgap (Eg = 2.35 (±0.02) eV & EU = 1.23 (±0.01) eV) compared to bare NiO NPs (Eg = 2.42 (±0.03) eV & EU = 0.94 (±0.02) eV), which is indicative for the charge transport modulation by TC-assisted synthesis, carbon integration and surface defects. Upon excitation with 300 nm radiation, the NiO@TC NPs emitted intense light in the form of NBE & DLE in the UV-blue band (325–500 nm). XPS, EDX, CHNS, FL, impedance spectroscopic and electrochemical analyses inferred existence of both Ni2+ & Ni3+ ions, carbonaceous species, lattice & surface defects and Ni vacancy, along with improved charge transport and diffusion in NiO@TC NPs. Astonishingly, TC-assisted synthesis and carbon integration in NiO@TC NPs contributed to extraordinary dielectric and electrochemical performance compared to bare NiO NPs, which might be suitable for the advanced opto-electronic, battery, supercapacitor, and energy storage applications. © 2026 Elsevier B.V.