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In-situ plasma processing of superconducting radio frequency (SRF) cavities is a performance recovery technique used to mitigate the field emission limiting phenomenon. It has been proved very effective at major particle accelerator…

The present study provides an investigation on the deposition of carbon-related products on different substrates using a high power dielectric barrier discharge fed with helium and saturated hydrocarbon gases. The discharge has been…

The first selective growth of graphenic carbon thin films on silicon dioxide is reported. A preliminary e-beam exposure of the substrate is found to strongly affect the process of such films growth. The emphasis is placed on the influence…

Materials Science · Physics 2015-12-24 Maxim Knyazev , Daria Sedlovets , Oleg Trofimov , Arkady Redkin

Uniform amorphous carbon film is deposited on the inner surface of quartz tube having the inner diameter of 6 mm and the outer diameter of 8 mm. A pulsed filamentary plasma source is used for the deposition. Long plasma filaments (~ 140 mm)…

Plasma Physics · Physics 2015-05-28 Ramasamy Pothiraja , Nikita Bibinov , Peter Awakowicz

Resistive switching in amorphous silicon carbide (a-SiC) films deposited by a single composite target magnetron sputtering process is reported. Switching performance as a function of thickness of the films (50, 100 and 300 nm) as well as…

Applied Physics · Physics 2019-08-13 P. Chaitanya Akshara , Nilanjan Basu , Jayeeta Lahiri , G. Rajaram , M. Ghanashyam Krishna

Carbides stand out because of their high hardness and wear-resistance. Thus these materials are often discussed for coatings of machine tools etc. Within this work Boron Carbide (B4C) and Carbide (C) thin films were deposited on Si (100)…

Materials Science · Physics 2008-05-06 Timo Koerner , Andreas Heinrich , Bernd Stritzker

CO$_2$ capture using carbon-based materials, particularly graphene and graphene-like materials, is a promising strategy to deal with CO$_2$ emissions. However, significant gaps remain in our understanding of the molecular-level interaction…

We investigate the work function (WF) variation of different Au crystallographic surface orientations with carbon atom adsorption. Ab-initio calculations within density-functional theory are performed on carbon deposited (100), (110), and…

Chemical Physics · Physics 2019-04-18 H. Z. Jooya , X. Fan , K. S. McKay , D. P. Pappas , D. A. Hite , H. R. Sadeghpour

Nonlinear damping, the change in damping rate with the amplitude of oscillations plays an important role in many electrical, mechanical and even biological oscillators. In novel technologies such as carbon nanotubes, graphene membranes or…

Microwave properties of High Temperature Superconductors (HTS) exhibit dependence on RF power levels. Effects of nonlinear phenomena causing this dependence can be modelled using lumped element circuits. Several RLC circuits to model the…

Superconductivity · Physics 2012-07-24 Dimitri O. Ledenyov , Janina E. Mazierska , Greg Allen , Mohan V. Jacob

Superconducting qubits have emerged as a potentially foundational platform technology for addressing complex computational problems deemed intractable with classical computing. Despite recent advances enabling multiqubit designs that…

Highly confined "spoof" surface plasmon-like (SSP) modes are theoretically predicted to exist in a perforated metal film coated with a thin dielectric layer. Strong modes confinement results from the additional waveguiding by the layer.…

Electron beam induced deposition of amorphous carbon finds several uses in microlithography, surface micromachining, and the manufacturing of micro- and nanomechanical devices. This process also occurs unintentionally in vacuum chambers of…

Materials Science · Physics 2011-05-06 S. Zaitsev , O. Shtempluck , E. Buks

Superconducting RF is a key technology for future particle accelerators, now relying on advanced surfaces beyond bulk Nb for a leap in performance and efficiency. The SRF thin film strategy aims at transforming the current SRF technology by…

The variation of the work function upon carbon adsorption on the reconstructed Au(110) surface is measured experimentally and compared to density functional calculations. The adsorption dynamics is simulated with ab-initio molecular…

Atomic Physics · Physics 2018-08-08 H. Z. Jooya , K. S. McKay , E. Kim , P. F. Weck , D. P. Pappas , D. A. Hite , H. R. Sadeghpour

We reveal the existence of stacking-dependent spatial(SDS) charge separation in graphitic carbonic nitride (g-C3N4) layers, with the density functional theory (DFT) calculations. In g-C3N4 bilayers, such SDS charge separation is found in…

Materials Science · Physics 2019-05-22 Chen Jiao , Da Zhan , Dong Han , XueJiao Chen , Wei Chen , Hai Xu , Lei Liu , DeZhen Shen

Silicon-based dielectric is crucial for many superconducting devices, including high-frequency transmission lines, filters, and resonators. Defects and contaminants in the amorphous dielectric and at the interfaces between the dielectric…

Instrumentation and Methods for Astrophysics · Physics 2023-08-09 M. Lisovenko , Z. Pan , P. S. Barry , T. Cecil , C. L. Chang , R. Gualtieri , J. Li , V. Novosad , G. Wang , V. Yefremenko

Integration of graphene with Si microelectronics is very appealing by offering potentially a broad range of new functionalities. New materials to be integrated with Si platform must conform to stringent purity standards. Here, we…

Molecules and particles make up $\sim 40 - 70\%$ of carbon in the interstellar medium, yet the exact chemical structure of these constituents remains unknown. We present carbon K-shell absorption spectroscopy of the Galactic Interstellar…

High Energy Astrophysical Phenomena · Physics 2023-05-31 John Staunton , Frits Paerels

We theoretically analyze the surface density of states of heavy fermion materials such as CeCoIn$_5$. Recent experimental progress made it possible to locally probe the formation of heavy quasi-particles in these systems via scanning…

Strongly Correlated Electrons · Physics 2014-01-22 Robert Peters , Norio Kawakami