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For more than five decades, a notable spread in the low frequencies of velocity and temperature spectra, scaled using inertial subrange properties and Monin-Obukhov similarity theory, has been observed in unstable stratification. A large…

流体动力学 · 物理学 2023-11-08 Claudine Charrondière , Ivana Stiperski

Impurity degrades tokamak plasmas confinement by causing energy loss, diluting the fuel concentration, even terminating the discharges in some extreme cases. Previously, the suppression effects of on-axis Electron Cyclotron Resonance…

We study the quantum phase transitions driven by a point impurity in a chain seamed with ring frustration. Rich phases and quantum phase transitions are uncovered and characterized by both bulk and impurity correlation functions.…

强关联电子 · 物理学 2021-07-22 Han-Chuan Kou , Zhen-Yu Zheng , Peng Li

Turbophoresis in inhomogeneous turbulent flows leads to the formation of large-scale nonuniform particle number density distributions of inertial particles. This effect is associated with an effective drift velocity directed toward regions…

流体动力学 · 物理学 2026-05-15 E. Elmakies , O. Shildkrot , N. Kleeorin , A. Levy , I. Rogachevskii

Wave-particle interaction in toroidal plasmas is an essential transport mechanism in drift wave instability-driven microturbulence. In tokamkas, different wave-particle resonance conditions have been found important for the energy and…

等离子体物理 · 物理学 2022-02-02 Ge Dong , Zhihong Lin

The two dimensional Thomas-Fermi approximation is applied to the problem of parabolic quantum dot composed of N electrons and an on-center impurity. Change induced by impurity on electron density, chemical potential and total energy is…

其他凝聚态物理 · 物理学 2010-02-05 Berna Gulveren , Ulfet Atav , Mehmet Sahin , Mehmet Tomak

Neutral beam injection or ion cyclotron resonance heating induces pressure anisotropy. The axisymmetric plasma equilibrium code HELENA has been upgraded to include anisotropy and toroidal flow. With both analytical and numerical methods, we…

等离子体物理 · 物理学 2015-02-10 Zhisong Qu , Michael Fitzgerald , Matthew John Hole

We theoretically consider the effect of plasmon collective modes on the frequency-dependent conductivity of graphene in the presence of the random static potential of charged impurities. We develop an equation of motion approach suitable…

介观与纳米尺度物理 · 物理学 2013-08-09 K. Kechedzhi , S. Das Sarma

The mean parallel current density evolution equation is presented using electromagnetic (EM) gyrokinetic equation. There exist two types of intrinsic current driving mechanisms resulted from EM electron temperature gradient (ETG)…

等离子体物理 · 物理学 2020-06-30 Wen He , Lu Wang , Shuitao Peng , Weixin Guo , Ge Zhuang

We investigate the role of thermal instability, arising from radiative cooling of an optically thin, dusty plasma, by linear stability analysis. The corresponding isobaric stability condition for condensation mode is found to be modified…

等离子体物理 · 物理学 2007-05-23 Madhurjya P. Bora

Inhomogeneities in wave propagation conditions near and below the solar surface have been detected by means of time-distance helioseismology. Here we calculate the effect of temperature inhomogeneities on the travel times of sound waves. A…

天体物理学 · 物理学 2015-06-24 M. Brüggen , H. C. Spruit

A combined effect of the orthorhombic crystal field and potential impurity scattering on several superconducting states of a tetragonal symmetry is studied within a weak-coupling mean field approach. It is shown that the nonmagnetic…

超导电性 · 物理学 2009-10-31 G. Haran , J. Taylor , A. D. S. Nagi

In this Letter, it is experimentally and theoretically shown that weak odd harmonics generated during the propagation of an infrared ultrashort ultra-intense pulse unexpectedly modify the nonlinear properties of the medium and lead to a…

光学 · 物理学 2015-06-18 P. Béjot , G. Karras , F. Billard , E. Hertz , B. Lavorel , E. Cormier , O. Faucher

We have investigated steady, radial gas outflows (or winds) from galaxies and the development of thermal instability in the hot gas. In order to see the maximum influence of the instability on the global structure of the galactic outflows,…

天体物理学 · 物理学 2009-10-31 Yutaka Fujita

The impurity effects are studied for the BiS_{2}- layered superconductors based on a two orbital model with the Bogoliubov-de-Gennes technique. The superconducting critical temperature (T_{c}) as a function of the mpurity concentration is…

超导电性 · 物理学 2013-10-29 S. L. Liu

We consider an electron coupled to a random distribution of point vortices in the plane (magnetic impurities). We analyze the effect of the magnetic impurities on the density of states of the test particle, when the magnetic impurities have…

凝聚态物理 · 物理学 2009-10-28 Jean Desbois , Cyril Furtlehner , Stéphane Ouvry

The evolution of the filamentation instability produced by two counter-streaming pair plasmas is studied with particle-in-cell (PIC) simulations in both one (1D) and two (2D) spatial dimensions. Radiation friction effects on particles are…

等离子体物理 · 物理学 2015-09-16 M. D'Angelo , L. Fedeli , A. Sgattoni , F. Pegoraro , A. Macchi

The flaring events observed in the Sagittarius A* supermassive black hole system can be attributed to the non-homogeneous nature of the near-horizon accretion flow. Bright regions in this flow may be associated with density or temperature…

高能天体物理现象 · 物理学 2022-12-21 Jesse Vos , Monika Moscibrodzka , Maciek Wielgus

It is found that in a wide range of temperatures and magnetic fields even a small concentration of magnetic impurities in a sample leads to a $T^{-1}$ temperature dependence of the nuclear heat capacity. This effect is related to a…

凝聚态物理 · 物理学 2009-10-30 A. M. Dyugaev , Yu. N. Ovchinnikov , P. Fulde

A connection between kinetic processes and intermittent turbulence is observed in the solar wind plasma using measurements from the Wind spacecraft at 1 AU. In particular, kinetic effects such as temperature anisotropy and plasma heating…

空间物理 · 物理学 2013-12-04 K. T. Osman , W. H. Matthaeus , B. Hnat , S. C. Chapman