arXiv subjects

Ravi Trivedi

Publications and source records attributed to Ravi Trivedi.

3 recordsLinked to original sources

arXiv2026

Carbon Farming: An Expository, Inter-Disciplinary Survey

Carbon farming is the collection of agricultural best practices specifically designed to maximize the capture and long-term storage of atmospheric carbon dioxide in soils and plant biomass, while simultaneously reducing greenhouse gas emissions from cultivation practices. Carbon farming can be viewed as a promising pathway to simultaneously address climate change mitigation, soil degradation, and farmer welfare. For example, if the entire agricultural cropland in India practices carbon farming, this will spectacularly offset about 50% of emissions from the country's annual transport-sector emissions. However, practical deployment of carbon farming is constrained by scientific challenges, inherent complexity, and fragmented understanding across disciplines. This inter-disciplinary, expository survey offers the first unified treatment of carbon farming for practitioners, policymakers, and researchers. The survey integrates insights from agronomy, soil science, climate science, measurement, reporting, and verification (MRV), economics, carbon markets, and policy design. We begin by establishing the conceptual foundations of soil organic carbon dynamics and agricultural carbon sequestration, and compare carbon farming with the paradigms of sustainable, regenerative, and organic agriculture. We then present a comprehensive landscape analysis of carbon-farming best practices, including both generic and crop-specific interventions, and systematically examine their co-benefits and trade-offs. The paper offers a rigorous review of MRV frameworks, emerging digital MRV technologies, and the carbon-credit project life cycle, followed by a structured analysis of voluntary and compliance carbon markets...

econ.GN↗

arXiv2025

First-Principles Study of Transition Metal Doped in 2D Polyaramid for Novel Material Modelling

We present a first--principles density functional theory (DFT) study of transition metal (TM = Ti, Cr, Mn, Fe, Co, Ni) functionalized two--dimensional polyaramid (2DPA) to explore their structural, electronic, and magnetic properties. Mechanical parameters, such as bulk modulus, shear modulus, Young's modulus, Poisson's ratio, and Pugh ratio, together with phonon dispersion, confirm the mechanical and dynamic stability of all doped systems. Electronic structure analysis shows strong binding of Co, Cr, Fe, Ni, and Ti with formation energies between --1.15 eV and --2.96 eV, while Mn binds more weakly (--0.67 eV). TM doping introduces new electronic states that reduce the band gap, with Fe-doped 2DPA exhibiting the lowest value of 0.26 eV. The systems display predominantly ferromagnetic ordering, with magnetic moments of 1.14 {\mu}B (Co), 3.57 {\mu}B (Cr), 2.26 {\mu}B (Fe), 4.19 {\mu}B (Mn), and 1.62 {\mu}B (Ti). These results demonstrate that TM--doped 2DPA possesses tunable magnetic and electronic characteristics, highlighting its potential for spintronic applications.

cond-mat.mtrl-sci↗

arXiv2024

Theoretical prediction of a novel Pt3Sn2S2 as a Nonmagnetic Weyl Semimetal in Kagome System

We present a detailed theoretical study of Pt3Sn2S2 a layered kagome type material inspired by recent investigation of Co3Sn2S2 reported in [Nature Communication 11, 3985 (2020) whose physical properties remain largely unexplored. Thermodynamic stability was confirmed via formation energy calculations while mechanical stability was evaluated using Voigt Reuss Hill approximation and elastic stability condition. Dynamical and thermal stability were validated through Phonon dispersion and Ab Initio Molecular Dynamics simulations with Pughs criterion classifying the material as ductile. Spin orbit coupling induced band splitting, giving rise to Weyl points and a Weyl semimetal phase accompanied by a SOC driven transition from non relativistic band touching to relativistic band touching making a topological phase shift. Under applied pressure, the coupling of spin and valley degrees of freedom generates spin valley intertwined Dirac cones enabling tunable electronic properties for spintronic and valleytronic applications. Boltzman transport calculations using AMSET reveal a high Seebeck coefficient with SOC and low thermal conductivity highlighting its potential for high performance thermoelectric devices.

cond-mat.str-el↗