Browsing School of Physics by Title
Now showing items 132-151 of 2104
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Bacterially synthesized tellurium nanostructures for broadband ultrafast nonlinear optical applications
(2019)Elementary tellurium is currently of great interest as an element with potential promise in nano-technology applications because of the recent discovery regarding its three two-dimensional phases and the existence of Weyl ... -
Ballistic vs diffusive low-frequency scaling in the XXZ and a locally perturbed XXZ chain
(2020)We study the matrix elements of local operators in the eigenstates of the integrable XXZ chain and of the quantum-chaotic model obtained by locally perturbing the XXZ chain with a magnetic impurity. We show that, at ... -
Band structures of rare gas solids within the GW approximation
(2005)Band structures for solid rare gases s Ne, Ar d have been calculated using the GW approximation. All electron and pseudopotential ab initio calculations were performed using Gaussian orbital basis sets and the ... -
Base-specific photocleavage of DNA induced by nanosecond U.V. pulsed laser radiation or methylene blue sensitisation
(1987)Excitation of DNA in neutral solution either with short-duration, intense pulses of excimer laser (248 nm) radiation or with low intensity red-ligh (633 nm) sensitisation by methylene blue causes cleavage of the DNA backbone ... -
A Bayesian approach to comparing theoretic models to observational data: A case study from solar flare physics
(2011)Solar flares are large-scale releases of energy in the solar atmosphere, which are characterized by rapid changes in the hydrodynamic properties of plasma from the photosphere to the corona. Solar physicists have typically ... -
A Bcool survey of the magnetic fields of planet-hosting solar-type stars
(2017)We present a spectropolarimetric snapshot survey of solar-type planet hosting stars. In addition to 14 planet-hosting stars observed as part of the BCool magnetic snapshot survey, we obtained magnetic observations of a ... -
BCS-BEC crossover in a system of microcavity polaritons
(American Physical Society, 2005)We investigate the thermodynamics and signatures of a polariton condensate over a range of densities, using a model of microcavity polaritons with internal structure. We determine a phase diagram for this system including ... -
Bending stability of Cu0.4CrO2 - A transparent p-type conducting oxide for large area flexible electronics
(2018)The current best performing p-type transparent conducting oxides are typically highly crystalline materials, deposited at high temperatures, and hence incompatible with the drive to low cost flexible electronics. We ... -
The benefit of the European User Community from transnational access to national radiation facilities
(2014)Transnational access (TNA) to national radiation sources is presently provided via programmes of the European Commission by BIOSTRUCT-X and CALIPSO with a major benefit for scientists from European countries. Entirely based ... -
Beyond the Heisenberg model: Anisotropic exchange interaction between a Cu-tetraazaporphyrin monolayer and Fe3O4(100)
(2013)The exchange coupling of a single spin localized at the central ion of Cu-tetraazaporphyrin on a magnetite(100) surface has been studied using x-ray magnetic circular dichroism (XMCD). Sum rule analysis of the XMCD spectra ... -
Bi-substitution-induced magnetic moment distribution in spinel BixCo2-xMnO4 multiferroic
(2009)We report the near-edge x-ray absorption spectroscopy (NEXAFS) at the Co/Mn L3,2 edge and oxygen K edge of the well-characterized Bi-substituted Co2MnO4 multiferroic samples. The evolution of peak features in NEXAFS spectra ... -
Bias asymmetry in the conductance profile of magnetic ions on surfaces probed by scanning tunneling microscopy
(2012)PHYSICAL REVIEW B 86 , 125411 (2012) Bias asymmetry in the conductance profile of magnetic ions on surfaces probed by scanning tunneling microscopy Aaron Hurley, Nadjib Baadji, and Stefano Sanvito School of Physics ... -
Bias voltage dependence of inverted magnetoresistance on the annealing temperature in MgO-based magnetic tunnel junctions
(Elsevier, 2009)MgO-based magnetic tunnel junctions (MTJs) with a layer sequence Ir22Mn78 or Fe50Mn50 (10 nm)/CoFe (2 nm)/Ru (0.85 nm)/CoFeB (0.5t<2 nm)/MgO (2.5 nm)/CoFeB (3 nm) have been fabricated. The bias voltage dependence of tunneling ... -
Bias-dependent oscillatory electron transport of monatomic sulfur chains
(2012)The bias-dependent oscillatory electron transport of monatomic sulfur chains sandwiched between gold electrodes is investigated with density functional theory and non-equilibrium Green's function method. At zero bias, in ... -
Biaxial strain-induced transport property changes in atomically tailored SrTiO3 -based systems
(2014)Several metallic SrTiO3-based systems, including reduced SrTiO3−δ, Nb-doped SrTiO3, and two-dimensional electron gas at the LaAlO3/SrTiO3(001) interface, have been epitaxially fabricated on various substrates inducing ... -
Bimetallic molybdenum tungsten oxynitride: Structure and electrochemical properties
(2013)Mesoporous molybdenum tungsten oxynitride was synthesised by the temperature-programmed reduction of the bimetallic oxide precursor in ammonia and its electrochemical properties were investigated in 1 M H2SO4 aqueous ... -
Blue amplified spontaneous emission from a stilbenoid-compound-doped polymer optical fiber
(2001)We report on the fabrication and characteristics of a step-index glass-clad polymer optical fiber that uses a novel fluorescent stilbenoid compound for lasing and amplification applications. The compound, 1,4-bis(4-diph ... -
Blue-green small-signal gain and saturation in a luminescent polymer gain medium
(2006)The authors study the optical gain and saturation behavior in a blue-green-emitting luminescent polymer gain medium. Based on the results of amplified spontaneous emission measurements, the gain coefficients, the gain-length ...