Results 81 to 90 of about 570,318 (292)

Plasmon dispersion in quasi-one and one-dimensional systems with non-magnetic impurities

, 2008
We calculate the plasmon dispersion in quasi-one-dimensional quantum wires, in the presence of non-magnetic impurities, taking into consideration the memory function formalism and the role of the forward scattering. The plasma frequency is reduced by the
Das Sarma, Giuliani, Goni, Götze, I. Grosu, Kopietz, L. Tugulan, Li, Luttinger, Rickayzen, Ritsko, Schwartz, Thakur, Tomonaga, Williams   +14 more
core   +1 more source

Removing Oxide Layers and Retaining Oxide‐Free Steel Surfaces by Polishing in Oxygen‐Free Atmosphere

Advanced Engineering Materials, EarlyView.
In this study, the efficacy of wet mechanical polishing under an oxygen‐free atmosphere for deoxidation and the retention of an oxide‐free steel surface are elucidated using X‐ray photoelectron spectroscopy. The methodology proved successful; however, the results were highly dependent on the preparation of the solvents used to clean the samples after ...
Friedrich Bürger, Lienhard Wegewitz, Wolfgang Maus‐Friedrichs   +2 more
wiley   +1 more source

Some aspects regarding impurities profile in fipronil-HPLC method [PDF]

Medicamentul Veterinar, 2011
Using a substance as active pharmaceutical ingredient in veterinary drug formulation requires the characterization of this substance as content in active compound and so in terms of impurities possiblepresent in it, the latter being a mandatory ...
Ana Csuma,, Cornelia Pirlog
doaj  

Observation of Fermi-energy dependent unitary impurity resonances in a strong topological insulator Bi_2Se_3 with scanning tunneling spectroscopy [PDF]

, 2012
Scanning tunneling spectroscopic studies of Bi_2Se_3 epitaxial films on Si (111) substrates reveal highly localized unitary impurity resonances associated with non-magnetic quantum impurities.
Chu, H., He, L., Teague, M. L., Wang, K.-L., Xiu, F.-X., Yeh, N.-C.   +5 more
core  

Study of impurities in spin-Peierls systems including lattice relaxation

, 1999
The effects of magnetic and non-magnetic impurities in spin-Peierls systems are investigated allowing for lattice relaxation and quantum fluctuations. We show that, in isolated chains, strong bonds form next to impurities, leading to the appearance of ...
A. Dobry, A. E. Feiguin, A. Fledderjohann, D. Augier, D. Augier, D. Augier, D. Khomskii, D. Poilblanc, E. Sorensen, G. B. Martins, G. Castilla, G. S. Uhrig, G. Wellein, H. Fukuyama, J. G. Lussier, J. Riera, J. Riera, J.-P. Renard, K. Manabe, L.-P. Regnault, M. Fabrizio, M. Fujita, M. Hase, M. Hase, M. Laukamp, P. Hansen, P. M. Hansen, R. Fehrenbacher, S. A. Brazovskii, S. B. Oseroff, S. Eggert, T. Masuda, V. Kiryukhin   +32 more
core   +1 more source

Population of Nonmetallic Inclusions in Liquid High‐Silicon Electrical Steel in Contact With MgO–C Refractories Based on Recyclates and Environmentally Friendly Binders

Advanced Engineering Materials, EarlyView.
The formation of nonmetallic inclusions (NMIs) was investigated in this study, carrying out immersion tests for 30 min at a temperature of 1600°C with liquid high‐silicon electrical steel (Si ≈ 3 mass‐%) and different MgO–C refractories. Conventional MgO–C refractories were considered, as well as MgO–C refractories containing MgO–C recyclate and ...
Lukas Neubert, Matheus Roberto Bellé, Florian Kerber, Dinesh Kumar Gunasekar, Hans‐Jörn Weddige, Christos G. Aneziris, Olena Volkova   +6 more
wiley   +1 more source

Pair breaking due to orbital magnetism in iron-based superconductors

, 2015
We consider superconductivity in the presence of impurities in a two-band model suited for the description of iron-based superconductors. We analyze the effect of interband scattering processes on superconductivity, allowing for orbital, i.e., nonspin ...
Hoyer, Mareike, Scheurer, Mathias S., Schmalian, Jörg, Syzranov, Sergey V.   +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

Design of intelligent air screen system based on fuzzy control algorithm

Shipin yu jixie
Objective: To solve the technical problems such as low separation efficiency, unstable control effect and overshoot in crop screening by air screen. Methods: An intelligent air screen system based on fuzzy control algorithm was proposed.
LIU Hongpeng, LIN Yuliang, TIAN Zhongcai, FANG Wenjing   +3 more
doaj   +1 more source

Mechanisms of electron scattering in uniaxially deformed n-Ge⟨Sb, Au⟩ single crystals

Condensed Matter Physics, 2019
Temperature dependencies for concentration and the Hall mobility of electrons for the n-Ge⟨Sb⟩ and n-Ge⟨Sb, Au⟩ single crystals uniaxially deformed along the crystallographic directions [100] and [111] are obtained on the basis of piezo-Hall effect ...
S.V. Luniov, P.F. Nazarchuk, A.I. Zimych, Yu.A. Udovytska, O.V. Burban   +4 more
doaj   +1 more source