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We have characterized phase coherence length, spin orbit scattering length, and the Hall factor in n-type MoS2 2D crystals via weak localization measurements and Hall-effect measurements. Weak localization measurements reveal a phase…

Mesoscale and Nanoscale Physics · Physics 2013-08-06 Adam T. Neal , Han Liu , Jiangjiang Gu , Peide D. Ye

We investigate quantum Hall stripes under in-plane magnetic field $B_\parallel$ in a variable-density two-dimensional electron gas. At filling factor $\nu = 9/2$, we observe one, two, and zero $B_\parallel$-induced reorientations at low,…

Mesoscale and Nanoscale Physics · Physics 2017-04-12 Q. Shi , M. A. Zudov , Q. Qian , J. D. Watson , M. J. Manfra

We measure the low-field Hall resistivity of a magnetically-doped two-dimensional electron gas as a function of temperature and electrically-gated carrier density. Comparing these results with the carrier density extracted from Shubnikov-de…

Mesoscale and Nanoscale Physics · Physics 2009-11-11 J. Cumings , L. S. Moore , H. T. Chou , K. C. Ku , S. A. Crooker , N. Samarth , D. Goldhaber-Gordon

Accretion disks are likely threaded by external vertical magnetic flux, which enhances the level of turbulence via the magnetorotational instability (MRI). Using shearing-box simulations, we find that such external magnetic flux also…

High Energy Astrophysical Phenomena · Physics 2015-06-22 Xue-Ning Bai , James M. Stone

The distributions of the magnetic field and temperature in a superconducting-disk magnetized by pulse field, and the levitation force between this disk and a permanent magnet are calculated from first principles. The calculation is based…

Superconductivity · Physics 2007-05-23 C Y He , Y Hou , L Liu , Z X Gao

By keeping nonlinear Boltzmann factor in electron density dependence on electrostatic potential it is demonstrated that large plasma density blobs, often seen in experiment inside separatrix, can exist within the framework of drift wave…

Plasma Physics · Physics 2016-06-28 S. I. Krasheninnikov

We study role of the Hall diffusion in the magnetic star-disc interaction. In a simplified steady state configuration, the total torque is calculated in terms of the fastness parameter and a new term because of the Hall diffusion. We show…

Solar and Stellar Astrophysics · Physics 2015-05-30 Mohsen Shadmehri

In a fluid subject to a magnetic field the viscous stress tensor has a dissipationless antisymmetric component controlled by the so-called Hall viscosity. We here propose an all-electrical scheme that allows a determination of the Hall…

Mesoscale and Nanoscale Physics · Physics 2017-11-06 Francesco M. D. Pellegrino , Iacopo Torre , Marco Polini

We report on a systematic study of Hall effect using high quality single crystals of type-II Weyl semimetal WTe2 with the applied magnetic field B//c. The residual resistivity ratio of 1330 and the large magnetoresistance of 1.5\times10^6 %…

Materials Science · Physics 2017-10-03 Rajveer Jha , Ryuji Higashinaka , Tatsuma D. Matsuda , Raquel A. Ribeiro , Yuji Aoki

Hall resistivity and magneto-thermopower have been measured for colossal magnetoresistive Tl2Mn2O7 over wide temperature and magnetic-field ranges. These measurements revealed that a small number of free electron-like carriers is…

Materials Science · Physics 2009-10-31 H. Imai , Y. Shimakawa , Yu. V. Sushko , Y. Kubo

We present a detailed investigation of static dipole polarizability of lithium clusters containing up to 22 atoms. We first build a database of lithium clusters by optimizing several candidate structures for the ground state geometry for…

Materials Science · Physics 2007-11-13 Rajendra R. Zope , Tunna Baruah , Mark R. Pederson

The sign change in the Hall conductivity has been studied in thin amorphous Nb$_{1-x}$Ge$_x (x\approx$0.3) films. By changing the film thickness it is shown that the field at which the sign reversal occurs shifts to lower values (from above…

Superconductivity · Physics 2009-11-07 Nobuhito Kokubo , Jan Aarts , Peter H. Kes

A crucial problem concerning a large variety of fusion devices is that the confinement due to an external magnetic field is lost above a critical density, while a widely accepted first principles explanation of such a fact is apparently…

Statistical Mechanics · Physics 2011-12-06 A. Carati , M. Zuin , A. Maiocchi , M. Marino , E. Martines , L. Galgani

The intrinsic spin Hall conductivity of typical topological insulators Sb$_2$Se$_3$, Sb$_2$Te$_3$, Bi$_2$Se$_3$, and Bi$_2$Te$_3$ in the bulk form, is calculated from first-principles by using density functional theory and the linear…

Materials Science · Physics 2020-11-25 S. M. Farzaneh , Shaloo Rakheja

We found that the conductivity of the two-dimensional electron system in Si-MOS structures is limited to a maximum value, G_{max}, as either density increases or temperature decreases. This value G_{max} is weakly disorder dependent and…

Strongly Correlated Electrons · Physics 2009-10-31 V. M. Pudalov , G. Brunthaler , A. Prinz , G. Bauer

We study the turbulence induced in the dust layer of a protoplanetary disk based on the energetics of dust accretion due to gas drag. We estimate turbulence strength from the energy supplied by dust accretion, using the radial drift…

Earth and Planetary Astrophysics · Physics 2015-05-30 Taku Takeuchi , Takayuki Muto , Satoshi Okuzumi , Naoki Ishitsu , Shigeru Ida

Low-frequency axial oscillations (5-50 kHz) stand out as a pervasive feature observed in many types of Hall thrusters. While it is widely recognized that the ionization effects play the central role in this mode, as manifested via the large…

Following recent experiments, we consider current flow in two dimensional electronic systems in the quantum Hall regime where a gradient in the electron density induces a spatial variation in the Hall resistivity. Describing the system in…

Mesoscale and Nanoscale Physics · Physics 2009-11-11 R. Ilan , N. R. Cooper , Ady Stern

The saturation level of the magnetorotational instability (MRI) is investigated using three-dimensional MHD simulations. The shearing box approximation is adopted and the vertical component of gravity is ignored, so that the evolution of…

Astrophysics · Physics 2009-11-10 Takayoshi Sano , Shu-ichiro Inutsuka , Neal J. Turner , James M. Stone

The Hall conductivity of disordered magnetic systems consisting of hard-core point vortices randomly dropped on the plane with a Poissonian distribution, has a behavior analogous to the one observed experimentally by R.~J.~Haug,…

Condensed Matter · Physics 2009-10-31 Jean Desbois , Stéphane Ouvry , Christophe Texier