scholarly journals Effective magnetic field induced by inhomogeneous Fermi velocity in strained honeycomb structures

2020 ◽  
Vol 102 (3) ◽  
Author(s):  
M. Oliva-Leyva ◽  
J. E. Barrios-Vargas ◽  
G. Gonzalez de la Cruz
Keyword(s):  
Magnetic Field ◽  
Effective Magnetic Field ◽  
Fermi Velocity ◽  
Honeycomb Structures

Spin generation and manipulation based on spin-orbit interaction in semiconductors

2017 ◽  
Author(s):  
J. Nitta
Keyword(s):  
Magnetic Field ◽  
Orbit Interaction ◽  
Degree Of Freedom ◽  
Effective Magnetic Field ◽  
Spin Orbit ◽  
Spin Orbit Interaction ◽  
Spin Degree ◽  
Dimensional Electron Gas ◽  
Spin Orbit Interactions ◽  
Electrical Generation

This chapter focuses on the electron spin degree of freedom in semiconductor spintronics. In particular, the electrostatic control of the spin degree of freedom is an advantageous technology over metal-based spintronics. Spin–orbit interaction (SOI), which gives rise to an effective magnetic field. The essence of SOI is that the moving electrons in an electric field feel an effective magnetic field even without any external magnetic field. Rashba spin–orbit interaction is important since the strength is controlled by the gate voltage on top of the semiconductor’s two-dimensional electron gas. By utilizing the effective magnetic field induced by the SOI, spin generation and manipulation are possible by electrostatic ways. The origin of spin-orbit interactions in semiconductors and the electrical generation and manipulation of spins by electrical means are discussed. Long spin coherence is achieved by special spin helix state where both strengths of Rashba and Dresselhaus SOI are equal.

OBSERVATION OF THE TRANSVERSE STERN–GERLACH EFFECT IN NEUTRAL POTASSIUM

1967 ◽  
Vol 45 (4) ◽  
pp. 1481-1495 ◽  
Author(s):  
Myer Bloom ◽  
Eric Enga ◽  
Hin Lew
Keyword(s):  
Magnetic Field ◽  
Angular Velocity ◽  
Reference Frame ◽  
Inhomogeneous Magnetic Field ◽  
Time Dependent ◽  
Effective Magnetic Field ◽  
Classical Analysis ◽  
At Resonance ◽  
Rotating Reference Frame

A successful transverse Stern–Gerlach experiment has been performed, using a beam of neutral potassium atoms and an inhomogeneous time-dependent magnetic field of the form[Formula: see text]A classical analysis of the Stern–Gerlach experiment is given for a rotating inhomogeneous magnetic field. In general, when space quantization is achieved, the spins are quantized along the effective magnetic field in the reference frame rotating with angular velocity ω about the z axis. For ω = 0, the direction of quantization is the z axis (conventional Stern–Gerlach experiment), while at resonance (ω = −γH0) the direction of quantization is the x axis in the rotating reference frame (transverse Stern–Gerlach experiment). The experiment, which was performed at 7.2 Mc, is described in detail.

Spin wave interferometer employing a local nonuniformity of the effective magnetic field

2007 ◽  
Vol 101 (11) ◽  
pp. 113919 ◽  
Author(s):  
S. V. Vasiliev ◽  
V. V. Kruglyak ◽  
M. L. Sokolovskii ◽  
A. N. Kuchko
Keyword(s):  
Magnetic Field ◽  
Spin Wave ◽  
Effective Magnetic Field

Abrikosov vortex corrections to effective magnetic field enhancement in epitaxial graphene

2021 ◽  
Vol 104 (8) ◽  
Author(s):  
Luke R. St. Marie ◽  
Chieh-I Liu ◽  
I-Fan Hu ◽  
Heather M. Hill ◽  
Dipanjan Saha ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Field Enhancement ◽  
Epitaxial Graphene ◽  
Effective Magnetic Field ◽  
Abrikosov Vortex ◽  
Magnetic Field Enhancement

Evidence for quasi-classical transport of composite fermions in an inhomogeneous effective magnetic field

1996 ◽  
Vol 11 (11S) ◽  
pp. 1482-1487 ◽  
Author(s):  
J H Smet ◽  
R Fleischmann ◽  
D Weiss ◽  
R Ketzmerick ◽  
R H Blick ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Effective Magnetic Field ◽  
Composite Fermions ◽  
Classical Transport

scholarly journals β Lyrae - A Binary System with Anomalous Abundances and Magnetic Field

1986 ◽  
Vol 90 ◽  
pp. 365-368
Author(s):  
M.Yu. Skul'skij
Keyword(s):  
Magnetic Field ◽  
Binary System ◽  
Chemical Elements ◽  
Mean Value ◽  
Effective Magnetic Field ◽  
Physical Parameters ◽  
Chemical Abundance ◽  
Bright Component

AbstractStudy of dependence of chemical abundance on conditions of excitation within the limits which could exist in the atmosphere of bright component have led to conclusion that by no modification of physical parameters a “normal” abundance of chemical elements in the atmosphere can be obtained. The variable effective magnetic field with mean value (−1350±50) Gauss is discovered.

scholarly journals He-Abnormal Stars

1993 ◽  
Vol 138 ◽  
pp. 394-404 ◽  
Author(s):  
Kurt Hunger ◽  
Detlev Groote
Keyword(s):  
Magnetic Field ◽  
Magnetic Dipole ◽  
Stellar Wind ◽  
Effective Magnetic Field ◽  
Physical Conditions ◽  
Phase Variations ◽  
Axes Of Symmetry ◽  
The Magnetic Field

AbstractThe He-rich variable HD 37479 has 2 axes of symmetry, one characterized by the depletion of metals, and one by the enrichment of He. The former is oriented along the axis of the magnetic dipole, while the latter is off set by some 45°. The 2 axes represent 2 different modes of diffusion, the first one being controlled solely by the magnetic field, irrespective of wind, the second one being due to stellar wind that is controlled by the magnetic field and intertial forces. It has been attempted to formulate simple physical conditions that allow to determine the diffusion regions on the surface. It is shown that the resulting surface map can well reproduce the observed phase variations of the equivalent widths of HeI 4471, of UV resonance lines of C IV and Si IV, and the effective magnetic field.

Mossbauer Investigation of the Chelyabinsk Meteorite Fragment

2016 ◽  
Vol 845 ◽  
pp. 269-272
Author(s):  
Magomed Guseynov ◽  
Sergey Taskaev ◽  
Ibragimkhan Kamilov
Keyword(s):  
Magnetic Field ◽  
Experimental Data ◽  
Effective Magnetic Field ◽  
Iron Ions ◽  
Qualitative Explanation ◽  
Chelyabinsk Meteorite ◽  
Chemical Conditions ◽  
The Individual ◽  
Physical And Chemical ◽  
Quadruple Splitting

The article devoted to study of the fragments of Chelyabinsk meteorite with the help of Mossbauer spectroscopy. It is shown that the iron in various fragments of the meteorite exist in different crystallographic, physical and chemical conditions. A new phenomenon of sharp increasing effective magnetic field in the region of the iron nuclei in the temperature range of 553-573 К and jumps of the main parameters of Mossbauer spectra at other temperatures are observed. According to the data of the isomer shifts and quadruple splitting of the individual spectra, iron ions have a valence of Fe2+ − 3d6, Fe3+ − 3d5, Fe4+ − 3d4, Fe6+ − 3d2 and also intermediate between them. A qualitative explanation of the experimental data is proposed.

Sign in / Sign up

Export Citation Format

Share Document