scholarly journals Spin-flip scattering in time-dependent transport through a quantum dot: Enhanced spin-current and inverse tunneling magnetoresistance

2008 ◽  
Vol 78 (15) ◽  
Author(s):  
Enrico Perfetto ◽  
Gianluca Stefanucci ◽  
Michele Cini
Keyword(s):  
Quantum Dot ◽  
Spin Current ◽  
Time Dependent ◽  
Tunneling Magnetoresistance ◽  
Spin Flip ◽  
Dependent Transport

SPIN-DEPENDENT BEATS CREATED BY IRRADIATION OF MICROWAVE FIELD THROUGH A QUANTUM DOT

2011 ◽  
Vol 25 (25) ◽  
pp. 2033-2039
Author(s):  
M. BAGHERI TAGANI ◽  
H. RAHIMPOUR SOLEIMANI
Keyword(s):  
Magnetic Field ◽  
Quantum Dot ◽  
Microwave Field ◽  
Spin Current ◽  
Tunneling Magnetoresistance ◽  
Rate Equations ◽  
Spin Accumulation ◽  
Spin Dependent Transport ◽  
Field Temperature ◽  
Dependent Transport

We study spin-dependent transport through a quantum dot with Zeeman split levels coupled to ferromagnetic leads and under influence of microwave irradiation. Current polarization, spin current, spin accumulation and tunneling magnetoresistance are analyzed using nonequilibrium Green's function formalism and rate equations. Spin-dependent beats in spin resolved currents are observed. The effects of magnetic field, temperature and Coulomb interaction on these beats are studied.

scholarly journals Time-dependent transport through a T-coupled quantum dot

2018 ◽  
Vol 91 (10) ◽  
Author(s):  
Georgios E. Pavlou ◽  
Nikolaos E. Palaiodimopoulos ◽  
Panayiotis A. Kalozoumis ◽  
Anastasios Sourpis ◽  
Fotios K. Diakonos ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Time Dependent ◽  
Dependent Transport

SPIN-DEPENDENT TRANSPORT THROUGH A FINITE INTERACTING QUANTUM DOT WITH INTRADOT SPIN-FLIP SCATTERING

2008 ◽  
Vol 22 (05) ◽  
pp. 323-335
Author(s):  
KAI-HE DING ◽  
ZHEN-GANG ZHU ◽  
XING-HAI LIU
Keyword(s):  
Quantum Dot ◽  
Local Density ◽  
Magnetic Moments ◽  
Spin Valve ◽  
Local Density Of States ◽  
Green Function Method ◽  
Spin Flip ◽  
Spin Dependent Transport ◽  
Valve Effect ◽  
Dependent Transport

Based on the non-equilibrium Green function method, we investigate the spin-dependent transport through a finite interacting quantum dot with intradot spin-flip scattering for non-collinear configuration. It is found that when the intradot spin-flip scattering is applied, the Kondo peaks in the local density of states and the conductance are split, and the splitting peaks are suppressed sharply. By changing the relative orientation of both magnetizations, amplitudes of the splitting peaks appear asymmetric, and reduce with the increasing relative angle θ of the two magnetic moments. It is uncovered that the presence of the spin-flip scattering tends to greatly suppress the spin-valve effect.

scholarly journals A new approach to time-dependent transport through an interacting quantum dot within the Keldysh formalism

2013 ◽  
Vol 26 (1) ◽  
pp. 015306 ◽  
Author(s):  
V Vovchenko ◽  
D Anchishkin ◽  
J Azema ◽  
P Lombardo ◽  
R Hayn ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Time Dependent ◽  
New Approach ◽  
Dependent Transport
Sign in / Sign up

Export Citation Format

Share Document