Browsing Physics (Scholarly Publications) by Title
Now showing items 1-20 of 1736
-
1.3 μm wavelength tunable single-mode laser arrays based on slots
(2021)Two twelve-channel arrays based on surface-etched slot gratings, one with non-uniformly spaced slots and another with uniformly spaced slots are presented for laser operation in the O-band. A wavelength tuning range greater ... -
1/f noise in MgO double-barrier magnetic tunnel junctions
(2011)Low frequency noise has been investigated in MgO double-barrier magnetic tunnel junctions (DMTJs) with tunneling magnetoresistance (TMR) ratios up to 250% at room temperature. The noise shows a 1/f frequency spectrum and ... -
1/f noise in the half-metallic oxides CrO2, Fe3O4, and La2/3Sr1/3MnO3
(American Physical Society, 1999)The excess low-frequency (1/f) electrical noise of three representative half-metallic oxides, CrO2, Fe3O4, and La2/3Sr1/3MnO3, has been studied as a function of the temperature (5?300 K) and a magnetic field (up to 12 T). ... -
The 2020 magnetism roadmap
(2020)Andreas Berger CICnanoGUNE BRTA Following the success and relevance of the 2014 and 2017 Magnetism Roadmap articles, this 2020 Magnetism Roadmap edition takes yet another timely look at newly relevant and highly active ... -
2D foams above the jamming transition: Deformation matters
(2017)Jammed soft matter systems are often modelled as dense packings of overlapping soft spheres, thus ignoring particle deformation. For 2D (and 3D) soft disks packings, close to the critical packing fraction ϕc, this results ... -
2D nanosheets from fool's gold by LPE: High performance lithium-ion battery anodes made from stone
(2021)Recently, it has been shown that it is possible to apply liquid-phase exfoliation to non-layered materials, yielding quasi-2D nanosheets. It has been proposed that even a slight bonding anisotropy in the starting crystal ... -
3.8 dB Noise figure in bulk semiconductor optical amplifier
(2013)The present paper reports numerical and experimental investigation of noise figure of a multi-section semiconductor optical amplifier. The designed amplifier shows a 3.8dB noise figure, which seems to be the lowest figure ... -
3D Printing of Multifunctional Conductive Polymer Composite Hydrogels
(2023)Functional conductive hydrogels are widely used in various application scenarios, such as artificial skin, cell scaffolds, and implantable bioelectronics. However, their novel designs and technological innovations are ... -
4D full-vector radio frequency complex magnetic susceptibility mapping. Near-field imaging of RFID tags
(2019)Radio frequency identification (RFID) is a technology permeating both everyday life and scientific applications alike. The most prolific passive tag-based system uses inductively-powered tags with no internal power source ... -
6 x 6 Effective Mass Hamiltonian for Heterostructures grown on (11N)-oriented substrates
(American Physical Society, 2003)The 6?6 effective mass Hamiltonian for semiconductor heterostructures grown on (11N)-oriented substrates is derived and is compared with the 4?4 model. The hole subbands of InGaAs/InP single quantum wells grown on ... -
850 nm GaAs/AlGaAs DFB lasers with shallow surface gratings and oxide aperture
(2019)We present and experimentally demonstrate a novel oxide-confined ridge-waveguide distributed feedback (DFB) laser with the first-order surface grating using only a single growth step. The metal contacts are laterally offset ... -
Ab Initio and Kinetic Modeling of β-d-Xylopyranose under Fast Pyrolysis Conditions
(2024)Lignocellulosic biomass is an abundant renewable resource that can be upgraded to chemical and fuel products through a range of thermal conversion processes. Fast pyrolysis is a promising technology that uses high temperatures ... -
Ab initio calculation of the biasdependent transport properties of Mn12 molecules
(2009)The bias-dependent transport properties of a device constructed by sandwiching a Mn 12 single molecule magnet between gold electrodes are investigated within an ab initio framework combining the nonequilibrium Green?s ... -
Ab initio comparison of spin-transport properties in MgO-spaced ferrimagnetic tunnel junctions based on Mn3Ga and Mn3Al
(2023)We report on first-principles spin-polarised quantum transport calculations (from NEGF + DFT) in MgO-spaced magnetic tunnel junctions (MTJs) based on two different Mn-based Heusler ferrimagnetic metals, namely Mn3Al and ... -
Ab initio electron theory for magnetism in Fe: Pressure dependence of spin-wave energies, exchange parameters, and Curie temperature
(American Physical Society, 2003)The spin-wave spectra for bcc Fe at various lattice constants are calculated by the ab initio density functional electron theory for various lattice constants, and the exchange parameters of a Heisenberg model are determined ... -
Ab initio study of alkali-metal-based bismuth selenides (A BiSe2; A = K, Na) for photovoltaic and thermoelectric applications
(2024)Iron pentacarbonyl (IPC) gas forms upon the reaction of carbon monoxide with Fe containing metallic surfaces under gas reforming conditions. IPC formation can sometimes reach alarming levels that cause metal loss, pipeline ... -
Ab initio study of electron transport in dry poly(G)-poly(C) A-DNA strands
(2010)The bias-dependent transport properties of short poly (G)-poly(C) A-DNA strands attached to Au electrodes are investigated with first-principles electronic-transport methods. By using the nonequilibrium Green's function ... -
Ab initio study on the magnetostructural properties of MnAs
(2006)The magnetic and structural properties of MnAs are studied with ab initio methods and by mapping total energies onto a Heisenberg model. The stability of the different phases is found to depend mainly on the volume and ... -
Ab initio theory for current-induced molecular switching: Melamine on Cu(001)
(2013)Melamine on Cu(001) is mechanically unstable under the current of a scanning tunneling microscope tip and can switch among configurations. However, these are not equally accessible, and the switching critical current depends ...
