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Necessary and sufficient conditions are given for density of shift-invariant subspaces of the space $\mathcal{L}$ of integrable functions of bounded support with the inductive limit topology.

泛函分析 · 数学 2020-08-05 Józef Burzyk

The longitudinal resistivity rho_{xx} and Hall coefficient R_H were measured for MgB2 sintered under high pressure. We found that R_H is positive like cuprate high-Tc superconductors, and decreases as the temperature increases for 40 K < T…

We theoretically study the current-driven domain wall motion in the presence of both the spin Hall effect and an extrinsic pinning potential. The spin Hall effect mainly affects the damping ratio of the domain wall precession in the pinning…

介观与纳米尺度物理 · 物理学 2013-05-02 Jisu Ryu , Kyung-Jin Lee , Hyun-Woo Lee

A comprehensive study of magnetoresistance and Hall effect has been performed for the set of the single crystals of non-magnetic metal LuB12 with the Jahn-Teller instability of the boron cage and dynamic charge stripes forming along <110>…

The density of states and the Hall conductivity of a two-dimensional electron gas in a uniform magnetic field and in the presence of a delta impurity are exactly calculated using elementary field theoretic techniques. Although these results…

介观与纳米尺度物理 · 物理学 2009-10-30 R. M. Cavalcanti , C. A. A. de Carvalho

We conjecture that observed protoplanetary disc accretion rates may be explained with low viscosities which could be the result of hydrodynamic turbulence. We show that viscosities parameterized in the usual way with $\alpha \gtrsim…

太阳与恒星天体物理 · 物理学 2017-12-13 Lee Hartmann , Jaehan Bae

Impact of spin transfer torque (STT) on the write error rate of a voltage-torque-based magnetoresistive random access memory is theoretically analyzed by using the macrospin model. During the voltage pulse the STT assists or suppresses the…

介观与纳米尺度物理 · 物理学 2019-06-04 Hiroshi Imamura , Rie Matsumoto

We discuss a few recent developments that are important for understanding of MHD turbulence. First, MHD turbulence is not so messy as it is usually believed. In fact, the notion of strong non-linear coupling of compressible and…

天体物理学 · 物理学 2009-11-10 A. Lazarian , J. Cho

Dust polarization orientations in molecular clouds often tend to be close to tangential to the Stokes $I$ dust continuum emission contours. The magnetic field and the emission gradient orientations, therefore, show some correlation. A…

星系天体物理 · 物理学 2015-06-03 Patrick M. Koch , Ya-Wen Tang , Paul T. P. Ho

We study a relativistic two-dimensional electron gas in the presence of a uniform external magnetic field and a random static scalar potential. We compute, in first order perturbation theory, the averages of the charge density and of the…

介观与纳米尺度物理 · 物理学 2015-06-25 N. Bralic , C. A. A. de Carvalho , R. M. Cavalcanti , P. Donatis

The magnetic network which consists of vertical flux tubes located in intergranular lanes is dominated by Hall drift in the photosphere-lower chromosphere region ($\lesssim 1 Mm$). In the internetwork regions, Hall drift dominates above…

太阳与恒星天体物理 · 物理学 2012-10-11 B. P. Pandey , Mark Wardle

We propose a new constraint on millicharged dark matter from considerations on galaxy clusters. The charged dark matter moves under the influence of the randomly oriented magnetic fields in galaxy clusters, and the corresponding dark matter…

宇宙学与河外天体物理 · 物理学 2016-02-15 Kenji Kadota , Toyokazu Sekiguchi , Hiroyuki Tashiro

Simulations of the magnetorotational instability (MRI) in a homogeneous shearing box have shown that the asymptotic strength of the magnetic field declines steeply with increasing resolution. Here I model the MRI driven dynamo as a large…

高能天体物理现象 · 物理学 2011-02-11 Ethan T. Vishniac

One special interest for the industrial development of Hall thruster is characterizing the anomalous cross-field electron transport observed after the channel exit. Since the ionization efficiency is more than 90%, the neutral atom density…

等离子体物理 · 物理学 2019-07-22 Debraj Mandal , Yves Elskens , Nicolas Lemoine , Fabrice Doveil

Magnetoresistivity and Hall effect measured in magnetic fields up to B=9T (B||c, J||ab) in electron-doped $Nd_{2-x}$Ce_{x}Cu$O_{4+{\delta}} single crystal films with x = 0.14; 0.15; 0.18 and different oxygen content ({\delta}) were studied…

Vacuum arc thruster performance in a magnetic nozzle configuration is experimentally characterized. Measurements are performed on a miniature coaxial thruster with an anode inner diameter of $1.8$ mm. The magnetic field B is produced by a…

等离子体物理 · 物理学 2020-06-25 Satyajit Chowdhury , Igal Kronhaus

Observations suggest that protoplanetary disks have moderate accretion rates onto the central young star, especially at early stages (e.g. HL Tau), indicating moderate disk turbulence. However, recent ALMA observations suggest that dust is…

地球与行星天体物理 · 物理学 2021-03-24 Hans Baehr , Zhaohuan Zhu

Hall effect based magnetic field sensors are vector sensors which are sensitive to the perpendicular component of the magnetic field. Typically, Si-based Hall sensors are used for most usages requiring low field sensitivity. For higher…

应用物理 · 物理学 2021-06-01 Marsha Mary Parmar , Hurmal Saren , Pintu Das

The spin Hall conductivity (SHC) and anomalous Hall conductivity (AHC) in more than 120 full Heusler compounds are calculated using density functional theory in a high-throughtput way. The electronic structures are mapped to the Wannier…

材料科学 · 物理学 2022-05-25 Yimin Ji , Wenxu Zhang , Hongbin Zhang , Wanli Zhang

The present study investigates the aerodynamic and aeroacoustic characteristics of a propeller operating under varying rotational speeds (RPM) and heights ("H" ), with a particular focus on the effects of upstream obstruction modelled as a…

流体动力学 · 物理学 2025-10-31 Qiyu Huang , Jingwen Deng , Zishuo Lin , Mahdi Azarpeyvand