scholarly journals Charge sign reversal in irregular ice particle-graupel collisions

2005 ◽  
Vol 32 (1) ◽  
Author(s):  
Eldo E. Avila
Keyword(s):  
Sign Reversal ◽  
Charge Sign

scholarly journals Selective Surface Charge Sign Reversal on Metallic Carbon Nanotubes for Facile Ultrahigh Purity Nanotube Sorting

ACS Nano ◽  
2016 ◽  
Vol 10 (3) ◽  
pp. 3222-3232 ◽  
Author(s):  
Jing Wang ◽  
Tuan Dat Nguyen ◽  
Qing Cao ◽  
Yilei Wang ◽  
Marcus Y.C. Tan ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Surface Charge ◽  
Sign Reversal ◽  
Charge Sign

scholarly journals Effects of the solar wind termination shock and heliosheath on theheliospheric modulation of galactic and anomalous Helium

2004 ◽  
Vol 22 (8) ◽  
pp. 3063-3072 ◽  
Author(s):  
U. W. Langner ◽  
M. S. Potgieter
Keyword(s):  
Solar Wind ◽  
Cosmic Ray ◽  
Magnetic Polarity ◽  
Termination Shock ◽  
Shock Acceleration ◽  
Diffusive Shock Acceleration ◽  
Cosmic Ray Modulation ◽  
Low Energies ◽  
Solar Wind Termination Shock ◽  
Charge Sign

Abstract. The interest in the role of the solar wind termination shock and heliosheath in cosmic ray modulation studies has increased significantly as the Voyager 1 and 2 spacecraft approach the estimated position of the solar wind termination shock. The effect of the solar wind termination shock on charge-sign dependent modulation, as is experienced by galactic cosmic ray Helium (He++) and anomalous Helium (He+), is the main topic of this work, and is complementary to the previous work on protons, anti-protons, electrons, and positrons. The modulation of galactic and anomalous Helium is studied with a numerical model including a more fundamental and comprehensive set of diffusion coefficients, a solar wind termination shock with diffusive shock acceleration, a heliosheath and particle drifts. The model allows a comparison of modulation with and without a solar wind termination shock and is applicable to a number of cosmic ray species during both magnetic polarity cycles of the Sun. The modulation of Helium, including an anomalous component, is also done to establish charge-sign dependence at low energies. We found that the heliosheath is important for cosmic ray modulation and that its effect on modulation is very similar for protons and Helium. The local Helium interstellar spectrum may not be known at energies

scholarly journals Interface-induced sign reversal of the anomalous Hall effect in magnetic topological insulator heterostructures

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Fei Wang ◽  
Xuepeng Wang ◽  
Yi-Fan Zhao ◽  
Di Xiao ◽  
Ling-Jie Zhou ◽  
...  
Keyword(s):  
Hall Effect ◽  
Electric Fields ◽  
First Principles ◽  
Berry Phase ◽  
Condensed Matter ◽  
Anomalous Hall Effect ◽  
First Principles Calculations ◽  
Sign Reversal ◽  
Berry Curvature ◽  
Topological Materials

AbstractThe Berry phase picture provides important insights into the electronic properties of condensed matter systems. The intrinsic anomalous Hall (AH) effect can be understood as the consequence of non-zero Berry curvature in momentum space. Here, we fabricate TI/magnetic TI heterostructures and find that the sign of the AH effect in the magnetic TI layer can be changed from being positive to negative with increasing the thickness of the top TI layer. Our first-principles calculations show that the built-in electric fields at the TI/magnetic TI interface influence the band structure of the magnetic TI layer, and thus lead to a reconstruction of the Berry curvature in the heterostructure samples. Based on the interface-induced AH effect with a negative sign in TI/V-doped TI bilayer structures, we create an artificial “topological Hall effect”-like feature in the Hall trace of the V-doped TI/TI/Cr-doped TI sandwich heterostructures. Our study provides a new route to create the Berry curvature change in magnetic topological materials that may lead to potential technological applications.

Sign reversal of anomalous Hall effect derived from the transformation of scattering effect in cluster-assembled Ni0.8Fe0.2 nanostructural films

Nanoscale ◽  
2021 ◽  
Author(s):  
Ning Jiang ◽  
Bo Yang ◽  
Yulong Bai ◽  
Yaoxiang Jiang ◽  
Shifeng Zhao
Keyword(s):  
Hall Effect ◽  
Anomalous Hall Effect ◽  
Sign Reversal ◽  
Surface And Interface ◽  
Scattering Effect ◽  
Single Substance ◽  
Interface Scattering ◽  
Hall Effects

Both surface and interface scattering induced a sign reversal of anomalous Hall effects (AHE) in a few heterostructures. The sign reversal exiting in a single-substance can clarify the role of...

Role of Fe and sign reversal of the Hall coefficient in quasicrystalline Al-Cu-Fe

1993 ◽  
Vol 48 (1) ◽  
pp. 630-633 ◽  
Author(s):  
P. Lindqvist ◽  
C. Berger ◽  
T. Klein ◽  
P. Lanco ◽  
F. Cyrot-Lackmann ◽  
...  
Keyword(s):  
Hall Coefficient ◽  
Sign Reversal

Sign reversal of the crystal field anisotropy in Fe-rich vs. Co-rich intermetallics with ThMn12 structure: theory

2001 ◽  
Vol 226-230 ◽  
pp. 1118-1119 ◽  
Author(s):  
M.D Kuz'min ◽  
Manuel Richter ◽  
Helmut Eschrig ◽  
K.H.J Buschow
Keyword(s):  
Crystal Field ◽  
Structure Theory ◽  
Sign Reversal

Protein Adsorption on Surface-Attached Weak Polyelectrolyte Layers

2012 ◽  
Vol 621 ◽  
pp. 93-96
Author(s):  
Qiong Li ◽  
Hai Ning Zhang
Keyword(s):  
Protein Adsorption ◽  
Methacrylic Acid ◽  
Electrostatic Interactions ◽  
Adsorbed Amount ◽  
Topmost Layer ◽  
Charge Sign ◽  
Fibrinogen Adsorption

Fibrinogen adsorption onto surface-attached poly(methacrylic acid) monolayers and poly(methacrylic acid)/polyethyleneimine bilayers has been investigated. The adsorbed amount of fibrinogen was found to be dependant on the charge sign of the topmost layer because of electrostatic interactions.

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