Search results for "fer"

Thermoelectric radiation detector based on a superconductor-ferromagnet junction : Calorimetric regime

2018

We study the use of a thermoelectric junction as a thermal radiation detector in the calorimetric regime, where single radiation bursts can be separated in time domain. We focus especially on the case of a large thermoelectric figure of merit ZT affecting significantly, for example, the relevant thermal time scales. This work is motivated by the use of hybrid superconductor/ferromagnet systems in creating an unprecedentedly high low-temperature ZT even exceeding unity. Besides constructing a very general noise model which takes into account cross correlations between charge and heat noise, we show how the detector signal can be efficiently multiplexed by the use of resonant LC circuits givi…

Modeling Heterogeneous copolymerization in scCO2

2008

Population transfer, light storage, and superluminal propagation by bright-state adiabatic passage.

2008

Global analysis of the pMSSM in light of the Fermi GeV excess: prospects for the LHC Run-II and astroparticle experiments

2016

We present a new global fit of the 19-dimensional phenomenological Minimal Supersymmetric Standard Model (pMSSM-19) that comply with all the latest experimental results from dark matter indirect, direct and accelerator dark matter searches. We show that the model provides a satisfactory explanation of the excess of gamma-rays from the Galactic centre observed by the Fermi~Large Area Telescope, assuming that it is produced by the annihilation of neutralinos in the Milky Way halo. We identify two regions that pass all the constraints: the first corresponds to neutralinos with a mass ~80-100 GeV annihilating into WW with a branching ratio of 95% ; the second to heavier neutralinos, with mass ~…

Deuil et narration à partir du malade en phase terminale. Repères anthropologiques et philosophiques pour l'accompagnement des personnes en fin de vi…

2020

El duelo corresponde a sentimientos individuales y colectivos relativos a la pérdida y la muerte. Es un concepto polisémico cuya aprehensión apela diversas ramas de conocimiento, como la psicología, el psicoanálisis, la historia, la antropología, la filosofía, etc. Se puede abrir su comprensión a otras realidades más englobantes, como la situación de enfermedad terminal, la muerte inminente, o todo tipo de pérdidas significativas en la existencia humana. El duelo es un fenómeno de la condición humana e interesa a cada cual, independientemente de su cultura, su época o la edad. Se refiere a la vivencia de un individuo determinado, confrontado a su estado de finitud, y expresa el “malestar” q…

Znaczenie i rola witaminy D w praktyce farmaceutycznej

2022

Pierwsze doniesienia o witaminie D pojawiły się w pierwszej połowie XX w. Jej odkrycie wywarło istotny wpływ na prewencję i leczenie krzywicy, a także umożliwiło poznanie i udokumentowanie roli w regulacji równowagi gospodarki wapniowo-fosforanowej. Dalsze doniesienia sugerują również inne istotne dla zdrowia właściwości witaminy D, w tym wpływ na układ mięśniowy, nerwowy, immunologiczny, krążenia, gospodarkę węglowodanową, otyłość, ryzyko wystąpienia chorób nowotworowych, a także (istotne dziś) zagadnienie wpływu na przebieg i zapadalność na COVID-19. Wyróżniono sześć form witaminy D różniących się strukturą łańcuchów bocznych. Do grupy witaminy D zaliczamy: cholekalcyferol (witamina D3) p…

E-supply Chain for International Technology Transfer

2001

This research (a review of current literature and empirical research) suggests that in order to make the e-supply chain for technology transfer of a Western country company (i.e., technology supplier) more efficient and effective than the conventional technology development and delivery approach, it should be considered as a process whose phases include planning, implementation and evaluation. This paper focuses only on the e-supply chain for technology package development for international technology transfer, and does not deal with all the aspects of IT-supported technology transfer process. peerReviewed

Finite-frequency spin susceptibility and spin pumping in superconductors with spin-orbit relaxation

2020

Static spin susceptibility of superconductors with spin-orbit relaxation has been calculated in the seminal work of A.A. Abrikosov and L.P. Gor'kov [Sov. Phys. JETP, {\bf 15}, 752 (1962)]. Surprisingly the generalization of this result to finite frequencies has not been done despite being quite important for the modern topic of superconducting spintronics. The present paper fills this gap by deriving the analytical expression for spin susceptibility. The time-dependent spin response is shown to be captured by the quasiclassical Eilenberger equation with collision integrals corresponding to the ordinary and spin-orbit scattering. Using the developed formalism we study the linear spin pumping…

Proximity Effect in Superconducting Heterostructures with Strong Spin-Orbit Coupling and Spin Splitting

2019

It has been shown that singlet Cooper pairs can be converted into triplet ones and diffuse into a ferromagnet over a long distance in a phenomenon known as the long-range proximity effect (LRPE). This happens in materials with inhomogeneous magnetism or spin-orbit coupling (SOC). Most of the previous studies focus on the cases with small SOC and exchange field. However, the physics was not clear when SOC and exchange field strength are both much greater than the disorder strength. In this work, we consider a two dimensional system with a large Rashba-type SOC and exchange field in the case where only one band is partially occupied. We develop a generalized quasiclassical theory by projectin…

Competition of electron-phonon mediated superconductivity and Stoner magnetism on a flat band

2018

The effective attractive interaction between electrons, mediated by electron-phonon coupling, is a well-established mechanism of conventional superconductivity. In metals exhibiting a Fermi surface, the critical temperature of superconductivity is exponentially smaller than the characteristic phonon energy. Therefore, such superconductors are found only at temperatures below a few kelvin. Systems with flat energy bands have been suggested to cure the problem and provide a route to room-temperature superconductivity, but previous studies are limited to only BCS models with an effective attractive interaction. Here we generalize Eliashberg's theory of strong-coupling superconductivity to syst…