scholarly journals Electron–electron interaction dominated resistivity minimum in quasi-continuous Ag nanocluster films

AIP Advances ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 125223
Author(s):  
Joshy Joseph ◽  
C. Bansal ◽  
K. Jonathan Reddy ◽  
A. Rajanikanth
Keyword(s):  
Electron Interaction ◽  
Resistivity Minimum

Low temperature resistivity anomalies in Pr-based nano-manganites

2015 ◽  
Vol 11 (3) ◽  
pp. 3184-3189 ◽  
Author(s):  
Proloy T. Das
Keyword(s):  
Low Temperature ◽  
Magnetic Fields ◽  
Electronic Transport ◽  
Weak Localization ◽  
Electron Interaction ◽  
Resistivity Minimum ◽  
Spin Dependent Scattering ◽  
T Values ◽  
Temperature Resistivity ◽  
Interaction Phase

The low-temperature electronic transport behavior of under doped polycrystalline Pr0.8Sr0.2MnO3 (PSMO) manganitenanoparticles (down to 40 nm), have been investigated in the presence of applied external magnetic fields (Hext) and adistinct resistivity minimum (ρmin) is observed below 50 K for each PSMO sample. It has been found that both depth of ρmin,and temperature of resistivity minima (min T ) values enhance with increase of Hext. Considering various possibilities likeCoulomb blockade theory, electron-electron interaction, phase separation, Kondo mechanism, we conclude thatoccurrence of low temperature resistivity anomalies (<min T ) in PSMO manganite system is presumably due to acombined effect of electron-electron interaction (~T1/2) and 3D weak localization (WL) mechanism. The proposed modelcan explain spin dependent scattering phenomena in disorder background of correlated manganite system and behaviorof various fit parameters responsible for low temperature resistivity anomalies under external magnetic fields.

scholarly journals Interplay of spin–orbit coupling and Coulomb interaction in ZnO-based electron system

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
D. Maryenko ◽  
M. Kawamura ◽  
A. Ernst ◽  
V. K. Dugaev ◽  
E. Ya. Sherman ◽  
...  
Keyword(s):  
Coulomb Interaction ◽  
High Mobility ◽  
Electron System ◽  
Orbit Coupling ◽  
Electron Interaction ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Strong Electron ◽  
Strongly Coupled ◽  
Dimensional Electron System

AbstractSpin–orbit coupling (SOC) is pivotal for various fundamental spin-dependent phenomena in solids and their technological applications. In semiconductors, these phenomena have been so far studied in relatively weak electron–electron interaction regimes, where the single electron picture holds. However, SOC can profoundly compete against Coulomb interaction, which could lead to the emergence of unconventional electronic phases. Since SOC depends on the electric field in the crystal including contributions of itinerant electrons, electron–electron interactions can modify this coupling. Here we demonstrate the emergence of the SOC effect in a high-mobility two-dimensional electron system in a simple band structure MgZnO/ZnO semiconductor. This electron system also features strong electron–electron interaction effects. By changing the carrier density with Mg-content, we tune the SOC strength and achieve its interplay with electron–electron interaction. These systems pave a way to emergent spintronic phenomena in strong electron correlation regimes and to the formation of quasiparticles with the electron spin strongly coupled to the density.

scholarly journals Elastic Electron Scattering from Methane Molecule in the Energy Range from 50–300 eV

2021 ◽  
Vol 22 (2) ◽  
pp. 647
Author(s):  
Jelena Vukalović ◽  
Jelena B. Maljković ◽  
Karoly Tökési ◽  
Branko Predojević ◽  
Bratislav P. Marinković
Keyword(s):  
Energy Range ◽  
Cross Section ◽  
Cross Sections ◽  
Accurate Determination ◽  
Electron Gun ◽  
Methane Molecule ◽  
Edge Plasma ◽  
Electron Interaction ◽  
Outer Planet ◽  
Elastic Electron

Electron interaction with methane molecule and accurate determination of its elastic cross-section is a demanding task for both experimental and theoretical standpoints and relevant for our better understanding of the processes in Earth’s and Solar outer planet atmospheres, the greenhouse effect or in plasma physics applications like vapor deposition, complex plasma-wall interactions and edge plasma regions of Tokamak. Methane can serve as a test molecule for advancing novel electron-molecule collision theories. We present a combined experimental and theoretical study of the elastic electron differential cross-section from methane molecule, as well as integral and momentum transfer cross-sections in the intermediate energy range (50–300 eV). The experimental setup, based on a crossed beam technique, comprising of an electron gun, a single capillary gas needle and detection system with a channeltron is used in the measurements. The absolute values for cross-sections are obtained by relative-flow method, using argon as a reference. Theoretical results are acquired using two approximations: simple sum of individual atomic cross-sections and the other with molecular effect taken into the account.

scholarly journals Influence of wave normal angles on hiss‐electron interaction in Earth's slot region

2015 ◽  
Vol 120 (11) ◽  
pp. 9385-9400 ◽  
Author(s):  
Yuzhu Gao ◽  
Fuliang Xiao ◽  
Qi Yan ◽  
Chang Yang ◽  
Si Liu ◽  
...  
Keyword(s):  
Electron Interaction ◽  
Wave Normal

scholarly journals SPECTRAL CORRELATIONS IN DISORDERED MESOSCOPIC METALS AND THEIR RELEVANCE FOR PERSISTENT CURRENTS

1996 ◽  
Vol 10 (28) ◽  
pp. 1397-1406 ◽  
Author(s):  
AXEL VÖLKER ◽  
PETER KOPIETZ
Keyword(s):  
Energy Levels ◽  
Three Dimensional ◽  
Average Density ◽  
Electron Interaction ◽  
Energy Window ◽  
Persistent Currents ◽  
Dependent Part ◽  
The Difference ◽  
Aharonov Bohm ◽  
Grand Canonical

We use the Lanczos method to calculate the variance σ2(E, ϕ) of the number of energy levels in an energy window of width E below the Fermi energy for noninteracting disordered electrons on a thin three-dimensional ring threaded by an Aharonov–Bohm flux ϕ. We confirm numerically that for small E the flux-dependent part of σ2(E, ϕ) is well described by the Altshuler–Shklovskii-diagram involving two Cooperons. However, in the absence of electron–electron interactions this result cannot be extrapolated to energies E where the energy-dependence of the average density of states becomes significant. We discuss consequences for persistent currents and argue that for the calculation of the difference between the canonical- and grand canonical current it is crucial to take the electron–electron interaction into account.

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