Browsing Physics (Scholarly Publications) by Title
Now showing items 1134-1153 of 1694
-
Origin of power fluctuations in GaN resonant-cavity light-emitting diodes
(2004)Resonant-cavity light-emitting diodes (RCLEDs) with multiple InGaN/GaN quantum wells have been grown on sapphire substrates. The emission was through the substrate, and the top contact consisted of a highly reflecting Pd/Ag ... -
Origin of the half-metallic properties of graphitic carbon nitride in bulk and confined forms
(2013)The electronic and magnetic properties of graphitic carbon nitride (g-C4N3) in both its bulk and confined form are investigated by using density functional theory. Our calculations show that the 2pz orbital of the carbon ... -
Origin of the n-type and p-type conductivity of MoS2 monolayers on a SiO2 substrate
(2013)Ab initio density functional theory calculations are performed to study the electronic properties of a MoS 2 monolayer deposited over a SiO 2 substrate in the presence of interface impurities and defects. When ... -
Origin of the p-Type Character of AuCl3 Functionalized Carbon Nanotubes
(2014)The microscopic origin of the p-type character of AuCl 3 functionalized carbon nanotubes (CNTs) is investigated using first-principles self-interaction corrected density functional the- ory (DFT). Recent DFT calculations ... -
Origin of the transition voltage in gold-vacuum-gold atomic junctions
(2013)The origin and the distance dependence of the transition voltage of gold–vacuum–gold junctions are investigated by employing first-principles quantum transport simulations. Our calculations show that atomic protrusions ... -
Origin of the Two-Dimensional Electron Gas at LaAlO3=SrTiO3 Interfaces: The Role of Oxygen Vacancies and Electronic Reconstruction
(2013)The relative importance of atomic defects and electron transfer in explaining conductivity at the crystalline LaAlO3=SrTiO3 interface has been a topic of debate. Metallic interfaces with similar electronic properties ... -
Origin of the x-ray-absorption fine structure in photon-stimulated ion desorption from Si-adsorbate systems
(1992)There is no general agreement on whether photon-stimulated ion desorption (PSID) extended and near-edge x-ray-absorption fine structure (EXAFS and NEXAFS) can provide surface structural information. To address this question, ... -
OSNR monitoring using two fiber interferometers
(2010)In-band OSNR from 5 to 30 dB of a single 10 G NRZ-OOK channel was measured by two fiber interferometers within an accuracy of ±0.5 dB without requirement for knowledge of the noise-free extinction ratio of the signal. -
Out of equilibrium thermodynamics of quantum harmonic chains
(2019)The thermodynamic implications for the out-of-equilibrium dynamics of quantum systems are to date largely unexplored, especially for quantum many-body systems. In this paper we investigate the paradigmatic case of an array ... -
Outbursts of classical symbiotics: Multi-wavelength observations of the 2000-2001 outburst of Z Andromedae
(Astronomical Society of the Pacific, 2002)We describe the first results from a program of multi-wavelength monitoring of symbiotic binary stars in outburst. The prototypical symbiotic star Z Andromedae was observed extensively at radio, optical, far-UV, and X-ray ... -
Oxidation of W(110) studied by LEED and STM
(2010)The oxidation of W(110) was studied over a temperature a range of 1000 K to 1600 K at 1x10-6 Torr oxygen. The subsequent oxide structure was then characterized using Low Energy Electron Di_raction (LEED) and Scanning ... -
Oxidation of ZnO thin films during pulsed laser deposition process
(2013)Pulsed laser deposition of ZnO thin films, using KrF laser, is analysed. The films were deposited on (001) sapphire substrates at 400 °C, at two different oxygen pressures (0·3 and 0·4 mbar) and two different target–substrate ... -
Oxide template for self-assembling arrays of metal nanoclusters
(2006)We demonstrate that ordered arrays of metal clusters of a few nanometers in size can be fabricated by self-assembly on a range of oxide nanotemplates. Two systems were chosen, FeO/Pt(111) and Fe3O4, having in common a ... -
Oxygen Electromigration and Energy Band Reconstruction Induced by Electrolyte Field Effect at Oxide Interfaces
(2018)Electrolyte gating is a powerful means for tuning the carrier density and exploring the resultant modulation of novel properties on solid surfaces. However, the mechanism, especially its effect on the oxygen migration and ... -
Oxygen radical functionalization of boron nitride nanosheets
(2012)The covalent chemical functionalization of exfoliated hexagonal boron-nitride nanosheets (BNNSs) is achieved by the solution phase oxygen radical functionalization of boron atoms in the h-BN lattice. This involves a two-step ... -
Oxygen-induced p(3 x 1) reconstruction of the W(100) surface
(2005)The oxidation of the W(100) surface at elevated temperatures has been studied using room temperature STM and LEED. High exposure of the clean surface to O-2 at 1500 K followed by flash-annealing to 2300 K in UHV results ...