arXiv subjects

Sindhunil Barman Roy

Publications and source records attributed to Sindhunil Barman Roy.

3 recordsLinked to original sources

arXiv2026

Kinetic Arrest of a First Order Phase Transition

We report a phenomenological theory for the kinetic arrest (KA) of a first-order phase transition, taking the Mott metal-insulator transition in $V_2O_3$ as a test case. By defining a order parameter $ϕ$ related to the monoclinic distortion of the high temperature metallic and mapping its Time-Dependent Ginzburg-Landau (TDGL) dynamics onto a disorder-influenced Imry-Wortis landscape, we derive a universal transcendental condition for the mechanism of the kinetic arrest. We demonstrate that epitaxial substrate-induced clamping in (001)-oriented $V_2O_3$ thin films elevates the elastic activation barriers, trapping the high-symmetry corundum phase down to 4.2~K. This structural suppression of the insulating state robustly explains the observed hysteretic $V$-$I$ switching a hallmark of memristive behaviour. Our work identifies a "Mott-Glass" as a structurally arrested non-equilibrium state in the strained thin-film of V$_2$O$_3$. Our work provides a predictive framework for engineering strain-tuned neuromorphic synapses.

cond-mat.mtrl-sci↗

arXiv2026

The Structure of Scientific Socialism: Quantum Emergence, Frustration, and the Non-Dual Dialectic

Classical Marxism and the algebra of revolution were formulated within the ontological constraints of 19th-century Newtonian materialism-a world of discrete, predictable, billiard-ball interactions. However, the 20th-century transitions in physics, from Thomas Kuhn's paradigm shifts to Phil Anderson's philosophy of emergence, have dismantled the reductionist foundations of this mechanical worldview. This paper proposes a New Manifesto for Scientific Socialism by synthesizing modern condensed matter physics with the non-dual philosophy of Advaita Vedanta. By examining the concepts of Geometric Frustration and Competing Interactions through the lens of Spin-Glasses and Mott Insulators, we argue that social stasis and synthesis are emergent properties of a universal consciousness field rather than mechanical inevitabilities. We further explore how this quantum-informed dialectic resolves the essential tension between the individual and the collective, echoing the intuitions of Schrodinger and Heisenberg regarding the foundational unity of reality.

physics.pop-ph↗

arXiv2018

Influence of material parameters on the performance of niobium based superconducting RF cavities

A detailed thermal analysis of a Niobium (Nb) based superconducting radio frequency (SRF) cavity in a liquid helium bath is presented, taking into account the temperature and magnetic field dependence of the surface resistance and thermal conductivity in the superconducting state of the starting Nb material (for SRF cavity fabrication) with different impurity levels. The drop in SRF cavity quality factor (Q_0) in the high acceleration gradient regime (before ultimate breakdown of the SRF cavity) is studied in details. It is argued that the high field Q_0-drop in SRF cavity is considerably influenced by the intrinsic material parameters such as electrical conductivity, and thermal diffusivity. The detail analysis also shows that the current specification on the purity of niobium material for SRF cavity fabrication is somewhat over specified. Niobium material with a relatively low purity can very well serve the purpose for the accelerators dedicated for spallation neutron source (SNS) or accelerator driven sub-critical system (ADSS) applications, where the required accelerating gradient is typically up to 20 MV/m,. This information will have important implication towards the cost reduction of superconducting technology based particle accelerators for various applications.

physics.acc-ph↗