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We study the stability of spinless Fermions with power law hopping $H_{ij} \propto |i - j|^{-\alpha}$. It is shown that at precisely $\alpha_c =2$, the dispersive inflection point coalesces with the band minimum and the charge carriers…

Mesoscale and Nanoscale Physics · Physics 2009-05-02 Shimul Akhanjee

An influence of a high-voltage (3-17 kV) 20 ns pulse on a weakly-ionized low-pressure (0.1-10 Pa) capacitively-coupled radiofrequency (RF) argon plasma is studied experimentally. The plasma evolution after pulse exhibits two characteristic…

The nanoparticle charging processes along with background spatial-temporal plasma profile have been investigated with 3DPIC simulation in a pulsed EUV exposure environment. It is found that the particle charge polarity (positive or…

Plasma Physics · Physics 2023-03-28 M. Chaudhuri , L. C. J. Heijmans , M. van de Kerkhof , P. Krainov , D. Astakhov , A. M. Yakunin

We report our direct study of the compressibility on ultrahigh mobility two-dimensional electron system ($\mu_{e} \sim 1 \times 10^{7}$ cm$^{2}$/Vs) in GaAs/AlGaAs quantum wells under microwave (MW) irradiation. The field penetration…

Mesoscale and Nanoscale Physics · Physics 2020-05-27 Jian Mi , Jianli Wang , Saeed Fallahi , Geoffrey C. Gardner , M. J. Manfra , Chi Zhang

A highly intense femtosecond laser pulse incident on a plasma target of supercritical density, gives rise to reflected high-order harmonics of the laser frequency. The radiation model adopted here considers Brunel electrons -those…

Plasma Physics · Physics 2015-06-19 R. Ondarza-Rovira , T. J. M. Boyd

We study plasmonic excitations in the limit of few electrons, in one-atom thick sodium chains, and characterize them based on collectivity. We also compare the excitations to classical localised plasmon modes and find for the longitudinal…

Mesoscale and Nanoscale Physics · Physics 2017-06-14 Jamie M. Fitzgerald , Sam Azadi , Vincenzo Giannini

When the electron density of highly crystalline thin films is tuned by chemical doping or ionic liq- uid gating, interesting effects appear including unconventional superconductivity, sizeable spin-orbit coupling, competition with…

Mesoscale and Nanoscale Physics · Physics 2018-12-19 G. Dezi , N. Scopigno , S. Caprara , M. Grilli

Ultracold neutral plasmas, formed by photoionizing laser-cooled atoms near the ionization threshold, have electron temperatures in the 1-1000 kelvin range and ion temperatures from tens of millikelvin to a few kelvin. They represent a new…

Atomic Physics · Physics 2009-11-13 T. C. Killian , T. Pattard , T. Pohl , J. M. Rost

We study the collective electronic excitations in metallic single- and bilayer transition metal dichalcogenides (TMDCs) using time dependent density functional theory in the random phase approximation. For very small momentum transfers…

Mesoscale and Nanoscale Physics · Physics 2015-06-17 Kirsten Andersen , Kristian S. Thygesen

A nanochannel subjected to both a potential and concentration gradient has an asymmetric current-voltage, I-V, response with three primary characteristics: the Ohmic conductance, G, the current at zero voltage, I(v=0), and the voltage at…

Mesoscale and Nanoscale Physics · Physics 2024-09-04 Oren Lavi , Yoav Green

Plasma simulations are powerful tools for understanding fundamental plasma science phenomena and for process optimization in applications. To ensure their quantitative accuracy, they must be validated against experiments. In this work, such…

The plasma dry reforming reaction of methane with carbon dioxide is investigated in a nanosecond repetitively pulsed discharge, a type of plasma that offers one of the highest non-equilibrium and performance characteristics. The…

Plasma Physics · Physics 2021-05-06 Cesare Montesano , Marzia Faedda , Luca Matteo Martini , Giorgio Dilecce , Paolo Tosi

An experimental indication of negative heat capacity in excited nuclear systems is inferred from the event by event study of energy fluctuations in $Au$ quasi-projectile sources formed in $Au+Au$ collisions at 35 A.MeV. The excited source…

Electronic devices that work in the quantum regime often employ hybrid nanostructures to bring about a nonlinear behaviour. The nonlinearity that these can provide has proven to be useful, in particular, for applications in quantum…

Mesoscale and Nanoscale Physics · Physics 2023-06-16 Joachim Lauwens , Lars Kerkhofs , Arnau Sala , Bart Sorée

The effect of electrical resistivity switching in nanographite films is described. In difference with cases published elsewhere the switching in nanographite films occurs from stable high conductive to metastable low conductive state.…

Mesoscale and Nanoscale Physics · Physics 2016-06-29 Sergey G. Lebedev

Mode-locking is predicted in a nanolaser cavity forming an effective photonic harmonic potential. The cavity is substantially more compact than a Fabry-Perot resonator with comparable pulsing period, which is here controlled by the…

Optics · Physics 2020-02-14 Yifan Sun , Sylvain Combrié , Fabien Bretenaker , Alfredo De Rossi

Significant transition strength in light $\alpha$-conjugate nuclei at low energy, typically below 10 MeV, has been observed in many experiments. In this work the isoscalar low-energy response of N=Z nuclei is explored using the Finite…

Nuclear Theory · Physics 2021-02-10 F. Mercier , A. Bjelčić , T. Nikšić , J. -P. Ebran , E. Khan , D. Vretenar

Collective, low-energy excitations in quasi-two-dimensional d-wave superconductors are analyzed. While the long-range Coulomb interaction shifts the charge-density-wave and phase modes up to the plasma energy, the spin-density-wave…

Superconductivity · Physics 2009-10-30 M. I. Salkola , J. R. Schrieffer

Low energy proton capture reactions have been studied in statistical model using the semi-microscopic optical potential in the mass range A=110-125. Nuclear density obtained from relativistic mean field calculation has been folded with…

Nuclear Theory · Physics 2015-06-11 Dipti Chakraborty , Saumi Dutta , G. Gangopadhyay , Abhijit Bhattacharyya

The basic features of nucleus-acoustic (NA) envelope bright and dark solitons, which exist in degenerate quantum plasmas, have been theoretically investigated by deriving the nonlinear Schr\"odinger (NLS) equation. The reductive…

Plasma Physics · Physics 2017-06-20 N. A. Chowdhury , M. M. Hasan , A. Mannan , A. A. Mamun
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