Search results for " jun"
showing 10 items of 611 documents
CONTROLLING THE QUANTUM DYNAMICS OF MULTIPARTITE JOSEPHSON CIRCUITS
2011
CONTROLLING THE QUANTUM DYNAMICS OF MULTIPARTITE JOSEPHSON CIRCUITS
Superconducting tunnel junction fabrication on three-dimensional topography based on direct laser writing
2020
Superconducting junctions are widely used in a multitude of applications ranging from quantum information science and sensing to solidstate cooling. Traditionally, such devices must be fabricated on flat substrates using standard lithographic techniques. In this study, we demonstrate a highly versatile method that allows for superconducting junctions to be fabricated on a more complex topography. It is based on maskless direct laser writing and two-photon lithography, which allows writing in 3D space. We show that high-quality normal metal–insulator–superconductor tunnel junctions can be fabricated on top of a 20-lm-tall three-dimensional topography. Combined with conformal resist coating m…
1987. Elecciones locales, autonómicas y europeas de 10 de junio de 1987. Comunitat Valenciana
2006
1987 seria año electoral en la Comunidad Valenciana. Sería un año caracterizado por diversos conflictos por la batalla de las listas electorales. El PSPV-PSOE: continuidad y unidad. La crisis de la derecha española y valenciana. Alianza Popular: Fraga dimite y Rita Barberá, candidata a la Generalitat. Fraga fracasa con el proyecto político de la gran derecha y la "mayoría natural" y dimite. La crisis nacional de Coalición Popular se trasladaba a la Comunidad Valenciana. Las listas: Rita Barberá, candidata popular a la Generalitat. Unión Valenciana. Filiberto Crespo candidato valencianista. Nacionalistas y comunistas debaten un pacto UPV-IU. Pacto Izquierda Unida (IU) y Unitat del Poble Vale…
Fabrication of 3-D phononic crystals for thermal transport management
2016
Thermal transport is an important physical phenomenon, and it has recently become even more relevant for the reduction of energy losses and the increase of efficiency in novel devices based on thermoelectricity [1]. Significant reduction of thermal conduction was recently achieved by coherent modification of phonon modes [2], with the help of periodic phononic crystal structures. However, currently the experimental studies have only been performed for two-dimensional (2-D) nanostructures. Theoretically, the magnitude of control of thermal transport should be even stronger in three-dimensional (3-D) phononic crystal structures. For that reason, the question arises how to fabricate the desire…
Charge Transport Mechanisms in Heavy-Ion Driven Leakage Current in Silicon Carbide Schottky Power Diodes
2016
Under heavy-ion exposure at sufficiently high reverse bias voltages silicon carbide (SiC) Schottky diodes are observed to exhibit gradual increases in leakage current with increasing ion fluence. Heavy-ion exposure alters the overall reverse current-voltage characteristics of these diodes, leaving the forward characteristics practically unchanged. This paper discusses the charge transport mechanisms in the heavy-ion damaged SiC Schottky diodes. A macro model, describing the reverse current-voltage characteristics in the degraded SiC Schottky diodes is proposed. peerReviewed
Parastā kadiķa Juniperus communis L. skujas anatomiskā uzbūve
2018
Parastais kadiķis ir nozīmīga kailsēkļu suga Latvijā. Lai noteiktu kadiķa skuju anatomiskās uzbūves atšķirības dažādu laikapstākļu ietekmē, izvēlējās parametrus, kuriem noteikt izmēru atšķirības. Paraugus ievāca trīs parauglaukumos: Valmierā, Kolkā, Sakas pagastā. Katrā parauglaukumā no 30 ievāktajām skujām piecām skujām pagatavoja anatomiskos griezumus. Griezumiem veica izpēti nosakot parametru izmērus. Katrai paraugu ievākšanas vietai tuvākajai meteoroloģiskajai stacijai ievāca datus par vidējo gaisa temperatūru, nokrišņu daudzumu, gaisa mitrumu. Darbā noskaidroja, ka septiņiem no 14 skuju anatomisko uzbūvi raksturojošajiem parametriem ir statistiski būtiskas atšķirības starp parauglaukum…
Development of niobium-based superconducting junctions
2012
This thesis presents a review of publications which mainly focuses on the fabrication and performance of Nb-based normal metal-insulator-superconductor (NIS) tunnel junctions and superconductor-normal metal-superconductor (SNS) Josephson junctions at low temperatures. The Cu/AlOx-Al/Nb based NIS double tunnel junctions were successfully fabricated using conventional electron beam lithography combined with multi-angle thermal evaporation of metals in ultra high vacuum. The subgap characteristics of these junctions showed expected temperature dependence from 0.2 K to 5 K with a good thermometry sensitivity 0.2-0.3 mV/K. Signatures of small electronic cooling effects were observed near the Nb …
Normal-Metal–Insulator–Superconductor Tunnel Junction With Atomic-Layer-Deposited Titanium Nitride as Superconductor
2015
Mythes et symbolique de l'eau chez Carl Gustav Jung
2007
International audience
Applications of tunnel junctions in low-dimensional nanostructures
2009
This thesis concentrates on studies of AlOx based tunnel junctions and their feasibility for cooling, thermometry and strain sensing in suspended nanostructures. The main result of the thesis is cooling of one dimensional phonon modes of a suspended nanowire with normal metal insulator superconductor (NIS) tunnel junctions. Simultaneous cooling of both electrons and phonons was achieved, and the lowest phonon temperature reached in the system was 42 mK with an initial temperature of 100 mK. In addition, suspended devices show cooling still at a bath temperature of 600 mK. The observed thermal transport characteristics show, that the heat flow is limited by the scattering of phonons at the b…