Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 416 for “"Heterostructures"”.
-
Anisotropic Heterostructures of Nanocrystals
… in technologically important systems such as heterostructures that exhibit visible light photocatalysis. Using the combination of NC heterostructures of materials with type II band offset and multiple exciton generation, TiO2/CdS and TiO2/PbS NC heterostructures have been synthesized as …
-
Magnetoelectric Oxide Nanocomposite Heterostructures
… the multiferroics magnetoelectric composite heterostructures exhibit a very promising future prospects. This dissertation focused on the design, fabrication and characterization of new multiferroics magnetoelectric composite heterostructures. First, based on the specific phase architectures …
-
Emerging phenomena in oxide heterostructures
… issue in controlling the novel behavior in oxide heterostructures is to understand how various physical variables (spin, charge, lattice and/or orbital hybridization) interact with each other. In particular, density function theory (DFT) has provided significant insight into underlying physics of …
-
Quantum transport in graphene heterostructures
The two dimensional charge carriers in mono- and bilayer graphene are described by massless and massive chiral Dirac Hamiltonians, respectively. This thesis describes low temperature transport experiments designed to probe the consequences of this basic fact. The first part concerns the effect of …
-
Graphene Heterostructures with Wide Bandgap Semiconductors
Il Grafene (Gr) è un materiale bidimensionale costituito da una membrana carboniosa di spessore atomico, caratterizzata da una peculiare combinazione di eccellenti proprietà elettriche, ottiche, termiche e meccaniche. La sua principale limitazione per applicazioni nell'ambito della …
-
Magnetoelectric Effect in Ferroelectric-Ferromagnetic Heterostructures
… magnetoelectric effect in CFO films on PMN-PT heterostructures. Elastic strain is an essential component of electro-mechanical-magnetic coupling. Most prior studies that used piezoelectric materials as a strain source assumed that these materials shared a linear relationship (d31 or d33) with …
-
Pulsed Laser Deposition of Thin Film Heterostructures
… of Strontium Ruthenate thin films, multilayer heterostructures of Terfenol-D thin films on polycrystalline Lead Titanate thin films were grown by pulsed laser deposition. By using a novel experimental technique called magnetic field assisted piezoelectric force microscopy it is possible to …
-
Theory of d₀ perovskites and their heterostructures
The recent discovery of a two-dimensional electron (2DEG) gas at interfaces between nonpolar SrTiO₃ (STO) with other polar perovskites has lead to an enormous amount of research. Among this 2DEGs most interesting properties are two-dimensional superconductivity and ferromagnetism, sometimes …
-
AlGaN/GaN heterostructures for enhancement mode transistors
Oggigiorno il continuo aumento della domanda di energia elettrica è divenuto un problema globale. Infatti la riduzione del consumo di energia è diventato il compito principale della moderna elettronica di potenza. In questo contesto, i semiconduttori a larga banda, come il nitruro di gallio (GaN) …
-
Heterostructures Prepared by Surface Modification of Nanocrystals
… hybrid NCs may lead to functional NC heterostructures with single particle precision. Here, we present NC-based heterostructures achieved from surface modified NCs. Surfactant bilayers formed around NCs have allowed hydrophobic NCs to be transferred into aqueous phase as well as …
-
Transverse and Longitudinal Tunneling in Confined Heterostructures
… effects and their application in confined heterostructures. In particular, three different three-terminal devices are studied which take advantage of the quantum-mechanical nature of electrons and holes to exhibit negative differential resistance (NDR) via tunneling.
-
Atomic structure characterization for YIG/ permalloy heterostructures
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-05-01
-
Control of Superconductivity in Cuprate/Manganite Heterostructures
Research has shown that the spin alignment in an adjacent ferromagnet is capable of suppressing superconductivity. In this project, devices incorporating cuprate/manganite heterostuctres were successfully fabricated to study the effects of spin transport on the high temperature superconductor, YBCO. …
-
Theoretical study of polar complex oxide heterostructures
… of polarisation and electrostatics in these heterostructures. The net charge at the LAO-STO interface is argued to be precisely as what one would obtain by taking the formal charges of the ions, irrespective of covalency, and despite both materials being centrosymmetric. The interfacial net …
-
Microstructural Analysis of Garnet-Heavy Metal Heterostructures
… all been clearly observed in REIG-heavy metal heterostructures [4,5]. These specific events allow the magnetization of the REIG to be switched without the use of an external magnetic field at very low powers. Their fast switching is showcased in ultrafast domain wall velocities reported in …
-
Minority carrier lifetimes in germanium on silicon heterostructures
Photodiodes sensitive in the NIR and integratable with Si have been pursued for many applications including imaging, communications, and photovoltaics. Since the Si bandgap is inefficiently matched to NIR wavelengths, photodiodes fabricated from a smaller bandgap material are needed. 25 nm …
-
THERMAL AND THERMOELECTRIC PROPERTIES OF TWO-DIMENSIONAL HETEROSTRUCTURES
… and potential applications. Van der Waals heterostructures with one 2D material stacked on another, are being established for devices with new functionalities and improved properties. The study of thermal properties is important for heat management of electronic devices while good …
-
Density functional theory investigations of graphene-based heterostructures
Graphene, a two-dimensional single crystal of carbon atoms arranged in a honeycomb lattice, is attractive for applications in nanoelectromechanical devices; in high-performance, low-power electronics, and as transparent electrodes. The present study employs Density Functional Theory (DFT) to …
Page 1 of 21