https://dspace.iiti.ac.in:8080/jspui/handle/123456789/9544 Tue, 12 May 2026 17:06:24 GMT 2026-05-12T17:06:24Z https://dspace.iiti.ac.in:8080/jspui/handle/123456789/18105 Title: Dynamics of an interacting hadron gas and measurements of Υ(nS) production and polarization in proton-proton collisions at √s = 13.6 TeV with ALICE Authors: Pradhan, Kshitish Kumar Abstract: Ultra-relativistic heavy-ion collision programs at the Large Hadron Collider (LHC) at CERN and the Relativistic Heavy Ion Collider (RHIC) at BNL are designed to explore strongly interacting matter under extreme conditions of temperature and energy density. In these experiments, the so-called little Bang created in ultra-relativistic nuclear collisions leads to the formation of a novel state of matter known as the quark–gluon plasma (QGP), in which quarks and gluons are no longer confined within hadrons. This state of matter is believed to have existed during the first few microseconds after the Big Bang. Consequently, studying the properties of QGP not only deepens our understanding of the strong interaction at the microscopic level but also provides valuable insight into the early evolution of the universe. The short lifetime of the QGP matter does not leave any direct signature. Its properties are inferred through indirect signatures and through a detailed understanding of the system’s evolution across different stages of the space-time evolution of the created fireball. The transport properties can play a major role in characterizing the dynamical evolution of the produced medium. Since the transport coefficients can, in principle, be derived from fundamental theory, their variation with thermodynamic parameters such as temperature and chemical potential can be useful in identifying the phase structure of QCD. Tue, 07 Apr 2026 00:00:00 GMT https://dspace.iiti.ac.in:8080/jspui/handle/123456789/18105 2026-04-07T00:00:00Z https://dspace.iiti.ac.in:8080/jspui/handle/123456789/18102 Title: Structural, optical, and electronic properties of Gd2TiO5 Authors: Nain, Ritu Abstract: Rare-earth titanates exhibit unique structural, physical, and optical properties, making them highly suitable for applications in the nuclear and radiation industries [1–2]. These materials are known for their high mechanical strength, as well as their excellent chemical and temperature resistance, which makes them effective in environments with high radiation flux, such as energy and nuclear settings [3]. This group of materials includes lanthanide perovskites (LnTiO3), pyrochlore-related structures (Ln2Ti2O7), and Ln4Ti9O24 compositions (where Ln is a lanthanide element from La to Lu) [4, 5]. A particularly interesting member of this class is Ln2TiO5, in which the Ti atom adopts a rare five-fold coordination geometry, a geometry rarely observed in most titanium-based transition metal oxides [4]. Most titanium-based oxides are found to exist in four-fold or six-fold coordination, possessing tetrahedral and octahedral geometries, and a significant amount of work in this regard has been done on perovskite (LnTiO3) and pyrochlore (Ln2Ti2O7) type structures. Tue, 07 Apr 2026 00:00:00 GMT https://dspace.iiti.ac.in:8080/jspui/handle/123456789/18102 2026-04-07T00:00:00Z https://dspace.iiti.ac.in:8080/jspui/handle/123456789/18093 Title: Design and development of multifunctional electrochromic devices Authors: Sahu, Bhumika Abstract: In the era of smart and adaptive technologies, materials that can sense and respond to their environment are reshaping modern electronics. Among them, electrochromism stands out as a key concept for flexible smart windows, energy-efficient systems, and multifunctional devices. Electrochromic materials can dynamically modulate color and transparency under an applied bias while storing energy, bridging the gap between materials and intelligent electronics. Covering inorganic, organic, and hybrid systems, they exhibit tunable band gaps that lead to visible color changes. Typically, electrochromic devices (ECDs) employ a five-layered configuration, with performance evaluated through parameters defining efficiency, stability, and reversibility. The growing demand for flexible, multifunctional, and energy-efficient smart devices has accelerated research in electrochromic (EC) technologies. This thesis focuses on the design, synthesis, and development of advanced electrochromic and electrochromic-supercapacitor (ESCD) devices by integrating all-organic and organic-inorganic hybrid materials to achieve superior optical modulation, rapid switching, and enhanced mechanical stability. Fri, 10 Apr 2026 00:00:00 GMT https://dspace.iiti.ac.in:8080/jspui/handle/123456789/18093 2026-04-10T00:00:00Z https://dspace.iiti.ac.in:8080/jspui/handle/123456789/17494 Title: Investigation of the structural, multiferroic, and dielectric properties of modified BaTiO3 Authors: Maneesha P Abstract: Magnetoelectric (ME) and multiferroic materials are essential for developing next-generation, novel, multifunctional devices. Hence, these are high-priority ferroic research materials. To date, extensive research has been conducted on magnetic and electric ordering and their coupling. Various materials and coupling mechanisms have been explored for ME coupling [1-2]. BaTiO3 (BTO) is a well-known ferroelectric (FE) material. BTO can be chemically modified to impart ferromagnetism (FM) to the crystal structure and develop magnetoelectric properties in the material. Transition metal (TM) doping at the Ti site is an effective method to achieve BTO-based magnetoelectric materials [3,4]. Some examples of the solid solutions of BTO with magnetic (ABO3) perovskite materials that demonstrate ME coupling are BaTiO3-BiFeO3 [5], BaTiO3–La0.7Ba0.3MnO3 [6], Mn- and Co-modified BaTiO3–BiFeO3 [7], etc. Apart from doping magnetic ions and solid solutions, composites with ferromagnetic materials [8], core-shell structures with magnetic materials [9], and heterojunction thin films of BTO with ferromagnetic films [10] facilitate ME coupling. Excellent ME coupling was observed in most of these materials, prompting exploration of their physical properties and utilisation in industrial applications. Mon, 01 Dec 2025 00:00:00 GMT https://dspace.iiti.ac.in:8080/jspui/handle/123456789/17494 2025-12-01T00:00:00Z