Browsing Physics (PHY) by Title
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Quantized heat flow probing thermal equilibration and edge structures of quantum Hall phases in graphene
In condensed matter physics, usually, phases are described using Landau’s approach, which characterizes the phases in terms of underlying symmetries that are spontaneously broken. Over the past few decades, a different ... 
Quantum Algorithms Using Nuclear Magnetic Resonance Quantum Information Processor
(20090512)The present work, brieﬂy described below, consists of implementation of several quantum algorithms in an NMR Quantum Information Processor. Game theory gives us mathematical tools to analyze situations of conﬂict between ... 
Quantum capacitance and noise measurements in van der Waals heterostructures
The discovery of graphene has revolutionized the field of condensed matter physics and opened new prospects for a wide range of other twodimensional materials. Further with the advancement of fabrication techniques, one ... 
Quantum Information Processing By NMR : Quantum State Discrimination, Hadamard Spectroscopy, Liouville Space Search, Use Of Geometric Phase For Gates And Algorithms
(20110222)The progess in NMRQIP can be outlined in to four parts.1) Implementation of theoretical protocols on small number of qubits. 2) Demonstration of QIP on various NMR systems. 3) Designing and implementing the algorithms for ... 
Quantum Information Processing By NMR : Relaxation Of Pseudo Pure States, Geometric Phases And Algorithms
(20090413)This thesis focuses on two aspects of Quantum Information Processing (QIP) and contains experimental implementation by Nuclear Magnetic Resonance (NMR) spectroscopy. The two aspects are: (i) development of novel methodologies ... 
Quantum oscillation in band insulators and properties of nonequilibrium steady states in disordered insulators
Starting with the experiment on Kondo insulator SmB6 , which shows 1/Bperiodic oscillations despite the absence of gapless electronic excitations in bulk, the candidate insulators showing quantum oscillation (QO) are on ... 
Quantum Simulations by NMR : Applications to Small Spin Chains and Ising Spin Systems
(20171122)Quantum simulations, where controllable quantum systems are used to simulate other quantum systems, originally proposed by Richard Feynman, are one of the most remarkable applications of quantum information science. Compared ... 
Quantum transport in Graphene Moire Superlattice and pn junction
The discovery of graphene has revolutionized the field of mesoscopic condensed matter physics. It has started a new field of vander Waals heterostructure in which different twodimensional materials including graphene can ... 
A Radio Study Of Gas Loss Processes In Nearby Galaxies
(20081017)The work in this thesis involves detailed multifrequency radio continuum (from 325 MHz to 15 GHz) and Hi spectroscopic studies of a few represent tative nearby galaxies which are experiencing gasloss from their disks ... 
Raman Spectroscopy Of Graphene And Graphene Analogue MoS2 Transistors
(20160618)The thesis presents experimental studies of device characteristics and vibrational properties of atomic layer thin graphene and molybdenum disulphide (MoS2). We carried out Raman spectroscopic studies on field effect ... 
Raman Studies of Topological Crystalline Insulator, Natural Heterostructures, Excitonic Insulator and Layered Oxide Under Pressure
The theme of this thesis is Raman spectroscopic study of a variety of exotic states of matter under extreme conditions, such as, hydrostatic pressure as high as 25 GPa and a wide temperature range from 77 K to 390 K. Raman ... 
Raman Study of gated devices in twodimensional materials and pressure effects
This thesis presents Raman study of 2D materials of contemporary interests: 2HMoTe_2, typeII Weyl semimetal (T_dMoTe_2), structurally anisotropic semiconductors (1T'ReX_2 (X=S, Se)) and Mott insulator (FePS_3) under ... 
Rapid light sheet fluorescence microscopy for dynamic imaging of living organisms
The primary goal of this thesis is to develop a light sheet based microscopy system that provides noninvasive images having high spatial and temporal resolution. The fluorescence microscopy has become an indispensable ... 
Realization of magnetic Weyl semimetallic phase in pyrochlore iridates thin films
Weyl semimetals (WSMs) are characterized by two linear nondegenerate band crossing inside the bulk of the Brillouin zone. The spindegeneracy of the bands can be lifted by either broken inversion symmetry or broken ... 
Realization of TypeII Dirac Semimetal in NiTe2 using Structural, Electrical and Magnetic Investigation
Dirac semimetal (DSM) is a topological semimetal with a fourfold degenerate linear band crossing in the bulk, in the presence of timereversal symmetry and inversion symme try, exhibiting nontrivial spinmomentum locking ... 
Resistance Fluctuations And Instability In Metal Nanowires
(20090313)The principal aim of this thesis is to study the electrical transport properties of metal nanowires. Specifically, we have focussed on investigating the resistance fluctuations of Ag and Cu nanowires of diameters ranging ... 
Role of Excess Fe in Pristine and Substituted Fe Chalcogenide Superconductors
(20180302)Fe chalcogenides : The discovery of superconductivity in Fe based compounds trig gered an intense research activity in this field with significant importance given to material synthesis. As a result, numerous materials ... 
Role of Friction in Microswimmer and Active Filament Motion
Friction is pervasive in all fields of science. It is the key factor that emerging technologies involving autonomous motion at micron scales such as microbots need to overcome in order to be efficient. They fall in the ...