Browsing Division of Physical and Mathematical Sciences by Title
Now showing items 206-225 of 884
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Electro-optic charge transport in semiconducting polymers
In this thesis, I have discussed the electric field dependence of photoconductivity of regioregular poly(3-hexylthiophene) [rr-P3HT] and its sensitization with Squaraine (SQ) dye. Even 1 wt % of SQ dye enhances the transport ... -
An electromagnetically actuated mesoscale ball and socket joint for applications in 3-D metrology and electrical characterization
Micro-robotics is concerned with development of robotic systems to manipulate micro-meter sized objects. To develop functional micro-robotic manipulators, it is necessary to develop joints that possess large motion range ... -
Electron Filed Emission Studies of Nanostructured Carbon Materials
(2018-03-08)Field emission is the emission of electrons from a solid under an intense electric field, of the order of 109 V/m. Emission occurs by the quantum mechanical tunneling of electrons through a potential barrier to vacuum. ... -
Electron Paramagnetic Resonance and Magnetic Studies of Certain Doped Rare Earth Manganites
Doped rare-earth manganites with the general formula T1xDxMnO3 where `T' is a trivalent rare earth ion, e.g. La3+;Nd3+; Pr3+ etc. and `D' is a divalent alkaline earth ion, e.g Ca2+; Sr2+;Ba2+ etc. display various ... -
Electron Spin Resonance And Optical Studies On The Conducting Polymer Polyaniline
(2011-07-11)For every phenomenon found in inorganic materials, organic counterparts have been found in the last 50 years. The discovery of metallic conductivity in the inorganic conjugated polymer (SN)x was a forerunner to the discovery ... -
Electronic behavior of epitaxial thin films of doped rare-earth nickelates
Rare-earth nickelates (RENiO3), a family of transition metal oxides, exhibit a complex phase diagram involving electronic, magnetic, and structural phase transitions. While LaNiO3 remains paramagnetic, metallic down to ... -
Electronic structure of two-dimensional materials: Effect of point defects and moiré patterns
In the last two decades, research on two-dimensional (2D) materials has gained momentum due to their capability to host a wide range of novel phases of matter. These materials have also found applications in electronic, ... -
Electronic transport in low dimensional LaAlO3/SrTiO3 heterointerface
The large variety of phenomena exhibited by the interface between two band-insulators LaAlO3 and SrTiO3 has attracted intense research activity in recent years.The interplay of different symmetries, viz. point group ... -
Electronic Transport in Low-Dimensional Systems Quantum Dots, Quantum Wires And Topological Insulators
(2018-04-05)This thesis presents the work done on electronic transport in various interacting and non-interacting systems in one and two dimensions. The systems under study are: an interacting quantum dot [1], a non-interacting quantum ... -
Electronics Instrumentation For Ion Trap Mass Spectrometers
(2011-01-31)The thesis aims at building an experimental setup for conducting the boundary ejection and resonance ejection experiments on wide variety of ion trap mass analyzers. The experimental setup has two parts namely power ... -
Elucidating Intricate Excited-state Dynamics in Molecular Systems Using Time-resolved Transient Absorption and Ultrafast Raman Spectroscopy
Abstract The excited-state dynamics of molecular materials is of great importance to understand early time photodynamics. We have used Femtosecond Transient Absorption (fs-TA) and Ultrafast Raman Loss Spectroscopy (URLS) ... -
Emergent Phenomena from Contacts and Disorder in High Mobility Graphene
The discovery of graphene and analogous van der Waals materials offers a platform for the discovery and exploration of various novel physical phenomena. Here we study the effects of local interaction and strong localisation ... -
Engineering Plasmonic Interactions in Three Dimensional Nanostructured Systems
(2018-02-08)Strong light matter interactions in metallic nanoparticles (NPs), especially those made of noble metals such as Gold and Silver is at the heart of much ongoing research in nanoplasmonics. Individual NPs can support collective ... -
Engineering topological surface states through structural control, electrostatic gating and superconducting proximity effects
Three dimensional topological insulators are materials characterized by a gapped insulating bulk and gapless metallic states on the sample surface. This unique be- havior arises out of the non-trivial topology of the ... -
Enhancing the spin-orbit torque efficiency in Pt/CoFeB/Pt based perpendicularly magnetized systems
Controlling and switching magnetization by the process of current-induced torque has a considerable advantage in lower power consumption for a memory device and spin logic device application. For a heavy metal (HM) / ... -
Entanglement properties of gauge theories and the graviton.
Entanglement entropy is emerging as a useful quantity to study critical phenomena in quantum systems, black holes physics, and holography. In this presentation, we discuss entanglement properties of gauge theories and ... -
Escape Of High Mass Ions Due To Initial Thermal Energy And Its Implications For RF Trap Design
(2013-05-31)This thesis investigates the loss of high mass ions due to the initial thermal energy in ion trap mass analyzers. It provides an analytical expression for estimating the percentage loss of ions of a given mass at a particular ... -
Establishing Super- and Sub-Chandrasekar Limiting Mass White Dwarfs to Explain Peculiar Type La Supernovae
(2018-06-23)A white dwarf is most likely the end stage of a low mass star like our Sun, which results when the parent star consumes all the hydrogen in its core, thus bringing fusion to a halt. It is a dense and compact object, where ... -
Evolution of the Magnetic Ground States with Lattice Distortion and Chemical Inhomogeneity in Doped Perovskite Oxides
(2018-04-18)The physics of doped transition metal perovskite has been an area of intense research in the last few decades due to their interesting magnetic and transport properties. Various exciting phenomena such as, colossal magneto ...