English
Related papers

Related papers: Surface and sub-surface modifications of copper el…

200 papers

Helium atoms in Rydberg states have been manipulated coherently with microwave radiation pulses near a gold surface and near a superconducting NbTiN surface at a temperature of $3 \text{K}$. The experiments were carried out with a skimmed…

We detail experimental results inferring ionization and temperature for warm dense copper plasmas at several times solid density (15 to 25 g/cm$^3$) and temperatures of 10 to 21 eV. Experiments performed at the OMEGA Laser Facility generate…

Specific-heat measurements are reported near the Curie temperature ($T_C$~= 320 K) on tri-glycine sulfate. Measurements were made on crystals whose surfaces were either non-grounded or short-circuited, and were carried out in magnetic…

Statistical Mechanics · Physics 2008-11-26 J. C. Lashley , C. P. Opeil , T. R. Finlayson , R. A. Fisher , N. Hur , M. F. Hundley , B. Mihaila , J. L. Smith

The application of a high electrical field on metallic surfaces leads to the well described phenomena of breakdown. In the classical scenario, explosive electron emission (EEE), breakdown (BD) originates from an emitting site (surface…

Accelerator Physics · Physics 2012-01-16 C. Antoine , F. Peauger , F. Le Pimpec

A plasma model is presented for the formation of ``cathode spots'' and subsequent crater development near field emission sites on a copper surface in the presence of a strong dc electric field. Adding to previously published models, we…

Accelerator Physics · Physics 2007-05-23 P. B. Wilson

This work is devoted to the investigation of the nonstationary problem of the thermal conductivity of a nanoemitter on the surface of a massive copper cathode when a field electron emission current passes through it. At the same time, the…

Applied Physics · Physics 2023-05-08 M. Diachenko , S. Lebedynskyi , R. Kholodov

The basis of low-temperature superconductivity has been set to be the pair formation of electrons, due to their effective attraction. The appearance of an effective attraction potential has also been predicted for electron-electron…

Mesoscale and Nanoscale Physics · Physics 2014-06-10 Norbert Kroo , Peter Racz , Sandor Varro

The electric fields near the heterogeneous metal/dielectric surface of an atom chip were measured using cold atoms. The atomic sensitivity to electric fields was enhanced by exciting the atoms to Rydberg states that are 10^8 times more…

Atomic Physics · Physics 2012-11-02 J. D. Carter , O. Cherry , J. D. D. Martin

Colloidal Cadmium Selenide (CdSe) nanoplatelets (NPLs) are a recently developed class of efficient luminescent nanomaterial suitable for optoelectronic device applications. A change in temperature greatly affects their electronic…

Mesoscale and Nanoscale Physics · Physics 2017-10-26 Sumanta Bose , Sushant Shendre , Zhigang Song , Vijay Kumar Sharma , Dao Hua Zhang , Cuong Dang , Weijun Fan , Hilmi Volkan Demir

The electrochemical oxidation of carbon monoxide adsorbed (COad) on platinum-on-carbon electrodes was studied via a methodology in which pre-adsorbed CO was partially oxidized by applying potentiostatic pulses for certain durations. The…

Copper oxide thin films are deposited on quartz substrates by DC magnetron sputtering and the effect of deposition temperature on their optoelectronic properties is examined in detail. Scanning Electron Microscopy (SEM), X-ray diffraction…

Materials Science · Physics 2022-12-26 Aarju Mathew Koshy , A Sudha , Satyesh Kumar Yadav , Parasuraman Swaminathan

When electrodes are biased above the plasma potential, electrons accelerated through the associated electron sheath can dramatically increase the ionization rate of neutrals near the electrode surface. It has previously been observed that…

Plasma Physics · Physics 2017-12-06 Brett Scheiner , Edward Barnat , Scott Baalrud , Matthew Hopkins , Benjamin Yee

High magnetic fields can increase the occurrence of vacuum arcing, suggesting that both electric and magnetic fields can play a role in the vacuum arcing process. The mechanism of vacuum arcing in high magnetic fields is believed to involve…

We studied the effects of substitution of Pd by Cu on the upper critical field of the noncentrosymmetric superconductor Li$_2$Pd$_{3-x}$Cu$_x$B, with x=0.0, 0.1 and 0.2. The upper critical field as a function of temperature was determined…

Superconductivity · Physics 2017-04-05 A. A. Castro , O. Olicón , R. Escamilla , F. Morales

The present letter extends the prior findings on self-induced heating of solid state field emission devices. It was found that a vacuum diode (base pressure $\sim10^{-9}$ Torr), that makes use of graphite-rich polycrystalline diamond as…

Materials Science · Physics 2019-06-20 Stanislav S. Baturin , Tanvi Nikhar , Sergey V. Baryshev

We report results from a study on electrical breakdown in liquid helium using near-uniform-field stainless steel electrodes with a stressed area of $\sim$0.725 cm$^2$. The distribution of the breakdown field is obtained for temperatures…

Instrumentation and Detectors · Physics 2024-07-19 N. S. Phan , W. Wei , B. Beaumont , N. Bouman , S. M. Clayton , S. A. Currie , T. M. Ito , J. C. Ramsey , G. M. Seidel

By codoping sulfur and copper into lead apatite, the crystal grains are directionally stacked and the room-temperature resistivity is reduced from insulating to $2\times10^{-5}~\Omega\cdot$m. The resistance-temperature curve exhibits a…

Superconductivity · Physics 2024-05-08 Hongyang Wang , Hao Wu , Ning Chen , Xianfeng Qiao , Ling Wang , Zhixing Wu , Zhihui Geng , Weiwei Xue , Shufeng Ye , Yao Yao

Co$_2$C nanoparticles (NPs) are amongst transition metal carbides whose magnetic properties have not been well explored. A recent study by Nirmal Roy et al. [1] showed that a collection of Co$_2$C NPs exhibit an exchange bias (EB) effect…

Strongly Correlated Electrons · Physics 2023-09-25 Nirmal Roy , P C Mahato , Suprotim Saha , M. Telling , J. S. Lord , D T Adroja , S. S. Banerjee

The shape memory effect and pseudoelasticity in Cu nanowires is one possible pair of mechanisms that prevents high aspect ratio nanosized field electron emitters to be stable at room temperature and permits their growth under high electric…

Materials Science · Physics 2016-04-22 Mihkel Veske , Stefan Parviainen , Vahur Zadin , Alvo Aabloo , Flyura Djurabekova