Switching of Current Spin Polarization by Electron-Phonon Interaction in a Quantum Dot Device

2013 ◽  
Vol 174 (3-4) ◽  
pp. 148-158 ◽  
Author(s):  
Yu Guo ◽  
Jun Zheng ◽  
Feng Chi
Keyword(s):  
Quantum Dot ◽  
Spin Polarization ◽  
Phonon Interaction ◽  
Electron Phonon Interaction ◽  
Current Spin Polarization

scholarly journals Single-Electron-Phonon Interaction in a Suspended Quantum Dot Phonon Cavity

2004 ◽  
Vol 92 (4) ◽  
Author(s):  
E. M. Weig ◽  
R. H. Blick ◽  
T. Brandes ◽  
J. Kirschbaum ◽  
W. Wegscheider ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Single Electron ◽  
Phonon Interaction ◽  
Electron Phonon Interaction

THE INFLUENCE OF ELECTRIC FIELD ON THE GROUND-STATE LIFETIME OF POLARON IN A PARABOLIC QUANTUM DOT

2011 ◽  
Vol 25 (03) ◽  
pp. 203-210
Author(s):  
WEI-PING LI ◽  
JI-WEN YIN ◽  
YI-FU YU ◽  
JING-LIN XIAO
Keyword(s):  
Quantum Dot ◽  
Electric Field ◽  
Ground State Energy ◽  
Ground State ◽  
State Energy ◽  
Phonon Coupling ◽  
Phonon Interaction ◽  
Strong Electron ◽  
Electron Phonon Interaction ◽  
Parabolic Quantum Dot

The ground-state energy of polaron was obtained with strong electron-LO-phonon coupling by using a variational method of the Pekar type in a parabolic quantum dot (QD). Quantum transition occurs in the quantum system due to the electron-phonon interaction and the influence of temperature. That is the polaron transition from the ground-state to the first-excited state after absorbing a LO-phonon and it causes the changing of the polaron lifetime. Numerical calculations are performed and the results illustrate the relations of the ground-state lifetime of the polaron on the ground-state energy of polaron, the electric field strength, the temperature, the electron-LO-phonon coupling strength and the confinement length of the quantum dot.

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