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🔍 ranjan kumar 📂 Physics 📄 Preprint
Showing 3374 results for "ranjan kumar" in Physics · Preprint
Physics Preprint PDF DOI

Raman Characterization of Two-Dimensional Quasiperiodic Antiferromagnets on Various Lattices: Spin-Orbit Mechanism

Takashi Inoue, Shoji Yamamoto · 2026

We study first-order (single-magnon) inelastic light scatterings in spin-$\frac{1}{2}$ two-dimensional quasiperiodic antiferromagnets in comparison with those emergent on periodic lattices. Unlike sec…

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Physics Preprint PDF DOI

Second Harmonic Generation Through Backward Raman Scattering in Magnetized Plasmas Driven by Circularly Polarized Intense Lasers

S. S. Ghaffari-Oskooei, A. A. Molavi Choobini · 2026

A fluid-based theoretical framework is developed to describe the nonlinear cascade linking primary BRS-driven plasma wave amplification, oscillating two-stream instability (OTSI), nonlinear current ge…

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Physics Preprint PDF DOI

Dichroic Raman probes for chiral edge modes

Avedis Neehus, Johannes Knolle · 2026

The identification and manipulation of charge-neutral fractionalized quasi-particles, in particular chiral edge modes (CEM), is a long-standing quest in physics. Remarkably, the microscopically mediat…

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Physics Preprint PDF DOI

Polarized light Raman scattering by an atom near an ultrathin periodically aligned carbon nanotube film

SK Firoz Islam, Michael Dean Pugh, Igor V. Bondarev · 2026

We present a systematic theoretical study of the Raman scattering effect for a two-level atomic system in near proximity of an ultrathin dielectric film with an embedded parallel array of periodically…

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Physics Preprint PDF DOI

Unraveling the significance of Raman modes, Gruneisen parameters and phonon lifetimes in the hexagonal allotropes of Silicon and Germanium compounds

Lekshmi S M, Upasana Agrawal, Akarsh Jain, Siddharth Sastri, Suvadip Das · 2026

Advancement in quantum information and quantum technologies has ushered in a new era of technological revolution in large scale atomistic simulation and efficient system on a chip device fabrication. …

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Physics Preprint PDF DOI

Lattice dynamics and complete polarization analysis of Raman-active modes in LaInO$_3$

Jonas Rose, Hai Nguyen, Moritz Mei{ss}ner, Zbigniew Galazka, Roland Gillen, Georg Hoffmann, Oliver Brandt, Manfred Ramsteiner, Markus R. Wagner, Hans Tornatzky · 2026

In this study, we present a comprehensive analysis of the Raman active phonon modes in orthorhombic LaInO$_3$ based on a combination of polarization-angle resolved Raman spectroscopy and density funct…

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Physics Preprint PDF DOI

First-principles study of infrared, Raman, piezoelectric and elastic properties of Mg-IV-N\textsubscript{2} (IV = Ge, Si, Sn)

Sarker Md. Sadman, Walter R. L. Lambrecht · 2026

Mg-IV-N\textsubscript{2} compounds with IV=Si, Ge, Sn are ultra-wide band gap semiconductors with various potential electronic and optoelectronic applications. They share the \textit{Pna}2\textsubscri…

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Physics Preprint PDF DOI

Sub-Nyquist time-domain surface-enhanced Raman mapping

Ting Wang, I. Brian Becerril-Castro, Ana Sousa-Castillo, Miguel A. Correa-Duarte, Ramon A. Alvarez-Puebla, Matz Liebel · 2026

Surface-enhanced Raman scattering (SERS) combines analyte-specificity and single-molecule sensitivity, but its potential is limited by slow readout where sophisticated nanosensors are analysed in a se…

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Physics Preprint PDF DOI

Raman response in superconducting multiorbital systems with application to nickelates

Matias Bejas, Jun Zhan, Xianxin Wu, Andreas P. Schnyder, Andres Greco · 2026

The recent discovery of high-$T_c$ superconductivity in pressurized and thin film nickelates is nowadays one of the most relevant and active topics in solid-state physics. The origin of superconductiv…

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A new helical InSeI polymorph: crystal structure and polarized Raman spectroscopy study

Lucia Olano-Vegas, Davide Spirito, Evgeny Modin, Pavlo Solokha, Sergio Marras, Marco Gobbi, Felix Casanova, Serena De Negri, Luis E. Hueso, Beatriz Martin-Garcia · 2026

Tetragonal InSeI is an interesting low-dimensional metal chalcohalide due to its composition and anisotropic crystal structure composed of helical chains, which give rise to optoelectronic properties …

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Physics Preprint PDF DOI

Microscopic investigation of $E2$ matrix elements in atomic nuclei -- II

Kouser Qureshie, S. P. Rouoof, J. A. Sheikh, N. Rather, S. Jehangir, G. H. Bhat, S. Frauendorf · 2026

The present work is a continuation of our earlier investigation with the primary objective to systematically calculate the $E2$ matrix elements using the microscopic approach of the triaxial projected…

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Surface-enhanced Raman scattering and density functional theory study of selected-lanthanide-citrate complexes (lanthanide: Tb, Dy, Ho, Er, Tm, Yb and Lu)

Hao Jin, Yuko S. Yamamoto · 2026

In this study, surface-enhanced Raman scattering (SERS) and density functional theory (DFT) calculations were combined to investigate the SERS spectra of Ln-citrate complexes (Ln: Tb, Dy, Ho, Er, Tm, …

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Physics Preprint PDF DOI

Raman amplification and ISRS in SDM links: Analytical evaluation and closed-form models for optical transmission

Lucas Alves Zischler, Antonio Mecozzi, Cristian Antonelli · 2026

In optical communications, the Raman effect is exploited for its lasing properties in distributed Raman amplification (DRA) and leads to spectral distortions through inter-channel stimulated Raman sca…

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Physics Preprint PDF DOI

Revealing the nature of the charge density wave order of ErTe$_3$ via Raman scattering under anisotropic strain

Theotime Freitas, Mattia Udina, Alexandr Alekhin, Niloufar Nilforoushan, Sarah Houver, Alain Sacuto, Benito A. Gonzalez, Ian R. Fisher, Indranil Paul, Yann Gallais · 2026

The nature of the charge density wave (CDW) order of the rare-earth tritelluride ErTe3 is investigated by Raman scattering under anisotropic strain. The CDW state of ErTe3 is unconventional since it i…

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Physics Preprint PDF DOI

Spectral-Domain Coherent Control of Broadband Raman Coupling in Atom Interferometry

Sheng-Zhe Wang, Wei-Chen Jia, Yue Xin, Qian-Lan Cai, Yingpeng Zhao, Yan-Ying Feng · 2026

The performance of atom interferometers is commonly limited by the finite spectral acceptance of atomic beam splitters and mirrors, which restricts efficient coupling to atoms with large Doppler shift…

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Physics Preprint PDF DOI

Temperature-dependent Raman spectra of 2H-MoS2 from Machine Learning-driven statistical sampling

Samuel Longo, Alois Castellano, Matthieu J. Verstraete · 2026

Molybdenum sulfides are in the spotlight of materials science thanks to their interesting properties for applications in optoelectronics, nanocomposites, lubricants, and catalysis. The structural char…

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Physics Preprint PDF DOI

Temporal soliton generation in an ultra-high-effective-Q Kerr resonator enabled by Raman gain

Georges Semaan, Yifan Sun, Nicolas Englebert, Simon-Pierre Gorza, Francois Leo · 2026

We demonstrate temporal pattern formation in a coherently driven fiber ring cavity whose effective finesse is continuously reconfigured using distributed Raman amplification. We achieve an effective f…

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Electrochemical doping in H-terminated diamond films: Impact of O-functionalization and insights from in-situ Raman spectro electrochemistry

N. Mohasin Sulthana, P.K. Ajikumar, K. Ganesan · 2026

The p-type surface conductivity of H-terminated diamond (HD, H-diamond) has created new path ways for developing diamond based electronic devices as well as chemical and bio-sensors. However, the hydr…

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Physics Preprint PDF DOI

Detecting pairing symmetry of bilayer nickelates using electronic Raman scattering

Jun Zhan, Matias Bejas, Andreas P. Schnyder, Andres Greco, Xianxin Wu, Jiangping Hu · 2026

The recent discovery of high-temperature superconductivity in both bulk and thin-film bilayer nickelates La$_3$Ni$_2$O$_7$ has garnered significant attention. However, the corresponding pairing symmet…

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Electronic Raman scattering from 2D metals with broken inversion symmetry

Mojdeh Saleh, Saurabh Maiti · 2026

Lack of inversion symmetry in metals breaks SU(2) symmetry which results in spin-splitting of the electronic states at the Fermi level due to various types of spin-orbit coupling (SOC) such as Dressel…

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