Results 71 to 80 of about 120,584 (295)

A semiquantitative approach to the impurity-band-related transport properties of GaMnAs nanolayers

, 2010
We investigate the spin-polarized transport of GaMnAs nanolayers in which a ferromagnetic order exists below a certain transition temperature. Our calculation for the self-averaged resistivity takes into account the existence of an impurity band ...
Boselli, M. A., Cabral, E. Dias, de Oliveira, E. J. R., Lima, I. C. da Cunha   +3 more
core   +1 more source

Al–Cu Composite Casting of Laser‐Deoxidized Copper: Bonding, Interfacial Chemistry, and Thermal Conductivity

Advanced Engineering Materials, EarlyView.
This study investigates laser‐based oxide removal of Cu inserts in oxygen‐free conditions and examines long‐term oxidation kinetics and surface chemistry under different atmospheres via X‐ray photoelectron spectroscopy. Al–Cu compound casting with differently oxidized surfaces is performed, and intermetallic phase formation, morphology, and thermal ...
Timon Steinhoff, Finn‐Lennard Janthur, Sascha Zimmermann, Sarah Seffer, Jörg Hermsdorf, René Gustus, Ludger Overmeyer, Wolfgang Maus‐Friedrichs, Hans Jürgen Maier, Christian Klose   +9 more
wiley   +1 more source

Bayesian inference of radial impurity transport in the pedestal of ASDEX Upgrade discharges using charge-exchange spectroscopy

Nuclear Fusion
We present a novel framework for quantifying radial impurity transport in the pedestal of ASDEX Upgrade (AUG) discharges. Our method is based on charge-exchange recombination spectroscopy measurements of line radiation from multiple impurity charge ...
T. Gleiter, R. Dux, F. Sciortino, T. Odstrčil, D. Fajardo, C. Angioni, J. Buchner, R.M. McDermott, T. Hayward-Schneider, G.F. Harrer, M. Faitsch, M. Griener, R. Fischer, E. Wolfrum, U. Stroth, the ASDEX Upgrade Team   +15 more
doaj   +1 more source

Predictive JET current ramp-up modelling using QuaLiKiz-neural-network

Nuclear Fusion, 2023
This work applies the coupled JINTRAC and QuaLiKiz-neural-network (QLKNN) model on the ohmic current ramp-up phase of a JET D discharge. The chosen scenario exhibits a hollow $T_\mathrm{e}$ profile attributed to core impurity accumulation, which is ...
A. Ho, J. Citrin, C.D. Challis, C. Bourdelle, F.J. Casson, J. Garcia, J. Hobirk, A. Kappatou, D.L. Keeling, D.B. King, F. Koechl, E. Lerche, C.F. Maggi, J. Mailloux, JET Contributors   +14 more
doaj   +1 more source

Impurity pinning in transport through 1D Mott-Hubbard and spin gap insulators

, 1999
A low energy crossover (see cond-mat/9711167) induced by Fermi liquid reservoirs in transport through a 1D Mott-Hubbard insulator of finite length $L$ is examined in the presence of impurity pinning.
Haldane, Jerom, Mahan, N. Nagaosa, Odintsov, Ponomarenko, Ponomarenko, Ponomarenko, Schmid, Solyom, Tarucha, V.V. Ponomarenko, Weiss, Yacobi, Yacobi   +14 more
core   +1 more source

Assessing Altered Coating Adhesion on Plasma‐Deoxidized Surfaces Under Oxygen‐Free Conditions

Advanced Engineering Materials, EarlyView.
This study demonstrates the effectiveness of atmospheric pressure plasma pretreatment in modifying silicon and stainless steel surfaces to improve adhesion. Argon‐hydrogen plasma increases surface roughness and improves adhesion strength, whereas pure argon results in smoother surfaces and structural changes.
Selina Raumel, Lara Kuhr, Khemais Barienti, Sebastian Herbst, Florian Nürnberger, Hans Jürgen Maier, Marc C. Wurz   +6 more
wiley   +1 more source

Impurity transport in Alcator C-Mod in the presence of poloidal density variation induced by ion cyclotron resonance heating

, 2014
Impurity particle transport in an ion cyclotron resonance heated Alcator C-Mod discharge is studied with local gyrokinetic simulations and a theoretical model including the effect of poloidal asymmetries and elongation.
Belli, Emily A., Fülöp, Tünde, Howard, Nathan T., Kazakov, Yevgen O., Mollén, Albert, Pusztai, István, Reinke, Matthew L., Team, the Alcator C-Mod   +7 more
core   +1 more source

Dynamic Testing of Cold Gas Sprayed Bipolar Plates–Porous Transport Layer Coating System in Proton Exchange Membrane Water Electrolysis

Advanced Engineering Materials, EarlyView.
Through direct application of porous transport layer (PTL) on the bipolar plate (BPP) with thermal spraying, the interfacial contact resistance is improved. With the cold gas sprayed BPP–PTL coating system, a proton exchange membrane water electrolysis cell with a cell voltage of Ucell = 1.9 V can be operated up to i = 2.5 A/cm2 in a dynamic mode ...
Kirsten Bobzin, Marvin Erck, Kevin Jasutyn, Katja Radermacher, Andreas Bund, Mario Kurniawan   +5 more
wiley   +1 more source

Modified Li chains as atomic switches [PDF]

, 2012
We present electronic structure and transport calculations for hydrogen and lithium chains, using density functional theory and scattering theory on the Green's function level, to systematically study impurity effects on the transmission coefficient.
Akgenc, Berna, Eckern, Ulrich, Schuster, Cosima, Schwingenschlögl, Udo, Wunderlich, Thomas   +4 more
core   +2 more sources

Impurity Transport in a Mixed-Collisionality Stellarator Plasma [PDF]

Physical Review Letters, 2017
11 pages, 3 ...
Helander, P., Newton, S., Mollen, A., Smith, H.   +3 more
openaire   +4 more sources