scholarly journals Transport through quantum-dot spin valves containing magnetic impurities

2010 ◽  
Vol 82 (24) ◽  
Author(s):  
Björn Sothmann ◽  
Jürgen König
Keyword(s):  
Quantum Dot ◽  
Spin Valves ◽  
Magnetic Impurities

scholarly journals Frequency-dependent current noise through quantum-dot spin valves

2006 ◽  
Vol 74 (7) ◽  
Author(s):  
Matthias Braun ◽  
Jürgen König ◽  
Jan Martinek
Keyword(s):  
Quantum Dot ◽  
Spin Valves ◽  
Current Noise ◽  
Frequency Dependent

Spin current through quantum-dot spin valves

2006 ◽  
Vol 18 (46) ◽  
pp. 10437-10443 ◽  
Author(s):  
J Wang ◽  
D Y Xing
Keyword(s):  
Quantum Dot ◽  
Spin Current ◽  
Spin Valves

scholarly journals Spin Switching via Quantum Dot Spin Valves

2018 ◽  
Vol 120 (1) ◽  
Author(s):  
N. M. Gergs ◽  
S. A. Bender ◽  
R. A. Duine ◽  
D. Schuricht
Keyword(s):  
Quantum Dot ◽  
Spin Valves ◽  
Spin Switching

Magneto-biexciton in a group III–V diluted magnetic quantum dot

2014 ◽  
Vol 28 (27) ◽  
pp. 1450188 ◽  
Author(s):  
D. Lalitha ◽  
A. John Peter ◽  
Chang Woo Lee
Keyword(s):  
Magnetic Field ◽  
Quantum Dot ◽  
Field Strength ◽  
Magnetic Field Strength ◽  
Optical Transition ◽  
Binding Energies ◽  
Mean Field Approximation ◽  
Magnetic Impurities ◽  
Spatial Confinement ◽  
G Factor

Binding energies of biexciton are computed in a GaMnAs / GaAlAs quantum dot with the effects of geometrical confinement, exchange interaction between the charge carrier and the magnetic impurities and the magnetic field. The size dependence of the binding energy of the biexciton in the presence of magnetic field is brought out. The optical transition energy, in the presence of magnetic field strength, is discussed for various magnetic impurities in a GaMn x As quantum dot. Numerical calculations are performed using variational technique. The spin polaronic energy of the biexciton with the effect of spatial confinement is carried out taking into account the mean field approximation in the presence of magnetic field strength. The magnetization of magnetic ion impurities as a function of dot radius is computed in a GaMn 0.02 As quantum dot. The effective g-factor as a function of spatial confinement is found in the GaMnAs quantum dot. The results show that the shift in spin polaron has more influence for the larger dot radius and the nonlinearity to linear behavior of g-factor for a particular dot size is achieved due to the sign reversal of Zeeman splitting.

scholarly journals Organic spin valves: effect of magnetic impurities on the spin transport properties of polymer spacers

2009 ◽  
Vol 11 (1) ◽  
pp. 013022 ◽  
Author(s):  
Sayani Majumdar ◽  
Himadri S Majumdar ◽  
Reino Laiho ◽  
Ronald Österbacka
Keyword(s):  
Transport Properties ◽  
Spin Transport ◽  
Spin Valves ◽  
Magnetic Impurities

scholarly journals Zero-bias anomaly in cotunneling transport through quantum-dot spin valves

2005 ◽  
Vol 72 (11) ◽  
Author(s):  
Ireneusz Weymann ◽  
Józef Barnaś ◽  
Jürgen König ◽  
Jan Martinek ◽  
Gerd Schön
Keyword(s):  
Quantum Dot ◽  
Spin Valves ◽  
Zero Bias ◽  
Zero Bias Anomaly
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