Spin accumulation on the spin-dependent transport through a quantum dot coupled to ferromagnet electrodes

2006 ◽  
Vol 358 (1) ◽  
pp. 47-52 ◽  
Author(s):  
Xi Chen ◽  
Hai-Feng Mu ◽  
Qing-Rong Zheng ◽  
Gang Su
Keyword(s):  
Quantum Dot ◽  
Spin Accumulation ◽  
Spin Dependent Transport ◽  
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 Spin-Dependent Transport through an Interacting Quantum Dot

2002 ◽  
Vol 89 (28) ◽  
Author(s):  
Ping Zhang ◽  
Qi-Kun Xue ◽  
Yupeng Wang ◽  
X. C. Xie
Keyword(s):  
Quantum Dot ◽  
Spin Dependent Transport ◽  
Dependent Transport

Spin-dependent transport through quantum dot with inelastic interactions

2006 ◽  
Vol 49 (4) ◽  
pp. 459-464 ◽  
Author(s):  
G.-Y. Sun ◽  
C.-X. Wu ◽  
Y. Chen ◽  
Z.-L. Yang
Keyword(s):  
Quantum Dot ◽  
Spin Dependent Transport ◽  
Inelastic Interactions ◽  
Dependent Transport

scholarly journals INFLUENCE OF SPIN-FLIP ON THE PERFORMANCE OF THE SPIN-DIODE

2011 ◽  
Vol 25 (30) ◽  
pp. 2335-2341 ◽  
Author(s):  
M. BAGHERI TAGANI ◽  
H. RAHIMPOUR SOLEIMANI
Keyword(s):  
Tunneling Time ◽  
Spin Accumulation ◽  
Spin Flip ◽  
Spin Dependent Transport ◽  
Ferromagnetic Lead ◽  
Analytical Relations ◽  
Dependent Transport ◽  
Reduced Density ◽  
Spin Diode ◽  
Fast Spin

We study spin-dependent transport through a spin diode in the presence of spin-flip by means of reduced density matrix approach. The current polarization and the spin accumulation are computed and influence of spin-flip on the current polarization is also analyzed. Analytical relations for the current polarization and the spin accumulation are obtained as a function of polarization of ferromagnetic lead and the spin-flip rate. It is observed that the current polarization becomes zero under fast spin-flip and the spin accumulation decreases up to 85% when the time of spin-flip is equal to the tunneling time. It is also observed that the current polarization increases linearly when the dot is singly occupied, whereas its behavior is more complicated when the dot is doubly occupied.

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.

Spin-dependent transport through an interacting quantum dot system

2010 ◽  
Vol 19 (7) ◽  
pp. 077302 ◽  
Author(s):  
Huang Rui ◽  
Wu Shao-Quan ◽  
Yan Cong-Hua
Keyword(s):  
Quantum Dot ◽  
Spin Dependent Transport ◽  
Dependent Transport
Sign in / Sign up

Export Citation Format

Share Document