scholarly journals Interaction effects in conductivity of a two-valley electron system in high-mobility Si inversion layers

2008 ◽  
Vol 78 (19) ◽  
Author(s):  
N. N. Klimov ◽  
D. A. Knyazev ◽  
O. E. Omel’yanovskii ◽  
V. M. Pudalov ◽  
H. Kojima ◽  
...  
Keyword(s):  
High Mobility ◽  
Electron System ◽  
Interaction Effects

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 Behaviour of Bichromatic Microwave Induced Magnetoresistance Oscillations in the High Mobility GaAs/AlGaAs 2D electron System

2017 ◽  
Vol 864 ◽  
pp. 012055
Author(s):  
Binuka Gunawardana ◽  
Han-Chun Liu ◽  
Rasanga L. Samaraweera ◽  
C. Reichl ◽  
W Wegscheider ◽  
...  
Keyword(s):  
High Mobility ◽  
Electron System ◽  
Magnetoresistance Oscillations

THEORETICAL DESIGN OF LIGHT-EMITTING POLYMERS — SUBSTITUTION EFFECTS OF EXCITED STATE ORDERING OF POLYDIACETYLENE AND POLYACETYLENE

2006 ◽  
Vol 05 (spec01) ◽  
pp. 391-400 ◽  
Author(s):  
LIPING CHEN ◽  
XINJUAN HOU ◽  
LINGYUN ZHU ◽  
SHIWEI YIN ◽  
Z. SHUAI
Keyword(s):  
Excited States ◽  
High Mobility ◽  
Molecular Orbital Calculation ◽  
Electron System ◽  
Substitution Effects ◽  
Electron Model ◽  
Light Emitting ◽  
Correlated Electron ◽  
The One ◽  
Correlated Electron System

The excited states structure, essential in determining the light-emitting properties, in a correlated electron system behaves differently from the one-electron system. Previous investigations show that upon proper chemical substitution, the non-emissive polyacetylene (PA) can be designed to be strongly light-emitting materials. On the basis of the correlated quantum chemical calculations within the INDO/EOM-CCSD approach, we systematically studied both the pristine and substituted polydiacetylene (PDA) about the low-lying excited states orderings. PDA possesses high mobility, but it is non-emissive. We predict that it is impossible to cause PDA to be light-emitting. From these numerical results, we propose a simple and practical rule to design conjugated light-emitting polymers, which require only a molecular orbital calculation instead of sophisticated correlated calculations. This rule is derived from physical pictures of correlated electron model, and is found to be in agreement with the existing experiments for various substituted PA and poly(p-phenylenebutadiynylene) (PPPB).

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