Browsing Physics (Scholarly Publications) by Title
Now showing items 547-566 of 1691
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Field induced transition in the paramagnetic state of (Sm0.65Sr0.35))MnO3 associated with matnegic clusters
(American Physical Society, 1999)The susceptibility of (Sm0.65Sr0.35)MnO3 shows an unusual temperature dependence above the Curie temperature which is attributed to the presence of small manganese-ion clusters with S?9. A field-induced transition is ... -
Field sensing in MgO double barrier magnetic tunnel junctions with a superparamagnetic Co50Fe50 free layer
(2012)Linear response and low frequency noise have been investigated in MgO double barrier magnetic tunnel junctions with a superparamagnetic Co50Fe50 free layer. Linear and hysteresis-free switching was observed for the Co50Fe50 ... -
Field-effect transistor made of individual V2O5 nanofibers
(American Institute of Physics, 2000)A field-effect transistor (FET) with a channel length of ~ 100 nm was constructed from a small number of individual V2O5 fibers of the cross section 1.5nm?10nm. At low temperature, the conductance increases as the gate ... -
Final Astro-2 calibration of the Hopkins Ultraviolet Telescope
(University of Chicago Press, 1999)We present the ?nal calibration of the Hopkins Ultraviolet Telescope (HUT) for its ?ight during the Astro-2 space shuttle mission in 1995 March. Aspects of mission operations and instrument performance that a?ect data ... -
Fine structure of coupled optical modes in photonic molecules
(2004)We report on the coherent coupling of whispering gallery modes (WGM) in a photonic molecule formed from two melamine-formaldehyde spherical microcavities with a thin shell of CdTe nanocrystals. Utilizing a microporous ... -
Fine structure of coupled optical modes in photonic molecules
(2004)We report on the coherent coupling of whispering gallery modes (WGM) in a photonic molecule formed from two melamine-formaldehyde spherical microcavities with a thin shell of CdTe nanocrystals. Utilizing a microporous ... -
Finite element method simulations of heat flow in fixed bed solar water splitting redox reactors
(2012)An improved design for radiation absorption and heat flow into materials with low thermal conductivity is demonstrated. The design was developed for application in fixed bed two step solar water splitting redox reactors. ... -
Finite-bias electronic transport of molecules in a water solution
(2010)The effects of water wetting conditions on the transport properties of molecular nanojunctions are investigated theoretically by using a combination of empirical-potential molecular-dynamics and first-principles electr ... -
Finite-momentum condensation in a pumped microcavity
(2010)We calculate the absorption spectra of a semiconductor microcavity into which a nonequilibrium exciton population has been pumped. We predict strong peaks in the spectrum corresponding to collective modes analogous to the ... -
Finite-size fluctuations and photon statistics near the polariton condensation transition in a single-mode microcavity
(2006)We consider polariton condensation in a generalized Dicke model, describing a single-mode cavity containing quantum dots, and extend our previous mean-field theory to allow for finite-size fluctuations. Within ... -
FIR absorption in CdSe quantum dot ensembles
(Wiley & Sons, 2001)Absorption of far-infrared (FIR) radiation in very small CdSe crystallites (quantum dots, QDs) via excitation of confined dipolar vibrational modes was studied, both theoretically and experimentally. Spatial quantisation ... -
First Principles Calculation of the Structure and Dielectric Properties of Bi2Ti2O7
(2010)The structure, vibrational modes, and phonon contribution to the dielectric function of the pyrochlore Bi 2 Ti 2 O 6 O were calculated using first-principles methods. Total-energy minimization calculations were ... -
First principles studies of multiferroic materials
(2009)Multiferroics, materials where spontaneous long-range magnetic and dipolar orders coexist, represent an attractive class of compounds, which combine rich and fascinating fundamental physics with a technologically appealing ... -
First principles study of the multiferroics BiFeO3, Bi2FeCrO6, and BiCrO3: Structure, polarization, and magnetic ordering temperature
(American Physical Society, 2005)We present results of an ab initio density-functional theory study of three bismuth-based multiferroics, BiFeO3, Bi2FeCrO6, and BiCrO3. We disuss differences in the crystal and electronic structure of the three systems and ... -
First principles study of the struc-
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First-principles investigation on the electronic efficiency and binding energy of the contacts formed by graphene and poly-aromatic hydrocarbon anchoring groups
(2015)The electronic e ffi ciency and binding energy of contacts formed between graphene electrodes and poly-aromatic hydrocarbon (PAH) anchoring groups have been investigated by the non-equilibrium Green’s function formalism ... -
First-Principles Prediction of a Room-Temperature Ferromagnetic Janus VSSe Monolayer with Piezoelectricity, Ferroelasticity, and Large Valley Polarization
(2019)Inspired by recent experiments on the successful fabrication of monolayer Janus transition-metal dichalcogenides [Lu, A.-Y.; Nat. Nanotechnol. 2017, 12, (8), 744 and ferromagnetic VSe2 [Bonilla, M.; Nat. Nanotechnol. 2018, ... -
First-Principles Prediction of Metal-Free Magnetism and Intrinsic Half-Metallicity in Graphitic Carbon Nitride
(2012)Transition metal-free magnetism and half-metallicity recently has been the subject of intense research activity due to its potential in spintronics application. Here we, for the first time, demonstrate via density functional ... -
First-principles prediction of polar half-metallicity and out-of-plane piezoelectricity in two-dimensional quintuple layered cobalt selenide
(2021)Polar half-metals, possessing both polarity and half-metallicity, may have potential as media in novel spintronic quantum devices, but they have never been reported in the two-dimensional (2D) form. By combining the particle ...
