scholarly journals Spin Polarization Oscillations without Spin Precession: Spin-Orbit Entangled Resonances in Quasi-One-Dimensional Spin Transport

2014 ◽  
Vol 4 (1) ◽  
Author(s):  
D. H. Berman ◽  
M. Khodas ◽  
M. E. Flatté
Keyword(s):  
Spin Polarization ◽  
Spin Transport ◽  
Spin Precession ◽  
Spin Orbit ◽  
One Dimensional

SPIN TRANSPORT FOR A QUANTUM WIRE WITH WEAK DRESSELHAUS SPIN-ORBIT COUPLING

2011 ◽  
Vol 25 (07) ◽  
pp. 487-496
Author(s):  
XI FU ◽  
ZESHUN CHEN ◽  
FENG ZHONG ◽  
YONGHONG KONG
Keyword(s):  
Spin Polarization ◽  
Quantum Wire ◽  
Spin Transport ◽  
Scattering Matrix ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Wall Potential ◽  
Electron Transport Properties ◽  
Scattering Matrix Method

We investigate theoretically the electron transport properties of a quantum wire (QW) non-adiabatically connected to two normal leads with weak Dresselhaus spin-orbit coupling (DSOC). Using the scattering matrix method and Landauer–Büttiker formula within the effective free-electron approximation, we have calculated the spin-dependent conductances G↑/↓ and spin polarization Pz of a hard-wall potential confined QW. It is demonstrated that regardless of the existence of DSOC G↑/↓ and Pz present oscillation structures near the subband edges of QW, and the number of quantized conductance plateaus is determined by the number of propagation modes in two leads. Moreover, the DSOC induces splitting of spin-up and spin-down conductance plateaus as well as the existence of spin polarization (Pz ≠ 0), and the enhancement of Dresselhaus strength destroys the conductance plateaus for the wide QW case. The above results indicate that the spin-dependent conductances and Pz are strongly dependent on the Dresselhaus strength which is the physical basis for spin transistor.

REEXAMINATION OF SPIN TRANSPORT THROUGH A DOUBLE-δ MAGNETIC BARRIER WITH SPIN-ORBIT INTERACTIONS

2009 ◽  
Vol 23 (30) ◽  
pp. 3631-3642
Author(s):  
CAIHUA BI ◽  
FENG ZHAI
Keyword(s):  
Magnetic Field ◽  
Field Strength ◽  
Spin Polarization ◽  
Energy Region ◽  
Spin Transport ◽  
Inhomogeneous Magnetic Field ◽  
Pure Spin ◽  
Spin Orbit ◽  
Spin Orbit Interactions ◽  
The Magnetic Field

We revisit the properties of spin transport through a semiconductor 2DEG system subjected to the modulation of both a ferromagnetic metal (FM) stripe on top and the Rashba and Dresselhaus spin-orbit interactions (SOIs). The FM stripe has a magnetization along the transporting direction and generates an inhomogeneous magnetic field in the 2DEG plane which is taken as a double-δ shape. It is found that the spin polarization of this system generated from a spin-unpolarized injection can be remarkable only within a low Fermi energy region and is not more than 30% for the parameters available in current experiments. In this energy region, both the magnitude and the orientation of the spin polarization can be tuned by the Rashba strength, the Dresselhaus strength, and the magnetic field strength. The magnetization reversal of the FM stripe cannot result in a change of the conductance, but can rotate the orientation of the spin polarization. The results are in contrast to those in [ J. Phys.: Condens. Matter15 (2003) L31] where a pure spin state for incident electrons is artificially assumed.

scholarly journals Correlations of stripe phase in one-dimensional spin-orbit coupled Bose gas

2021 ◽  
Vol 3 (2) ◽  
Author(s):  
Clemens Staudinger ◽  
Martin Panholzer ◽  
Robert E. Zillich
Keyword(s):  
Bose Gas ◽  
Spin Orbit ◽  
Stripe Phase ◽  
One Dimensional

scholarly journals Selective spin transport through a quantum heterostructure: Transfer matrix method

2016 ◽  
Vol 30 (25) ◽  
pp. 1650184 ◽  
Author(s):  
Moumita Dey ◽  
Santanu K. Maiti
Keyword(s):  
Transfer Matrix ◽  
Transfer Matrix Method ◽  
Matrix Method ◽  
Spin Transport ◽  
Tight Binding ◽  
Transmission Probability ◽  
Applied Bias Voltage ◽  
One Dimensional ◽  
Wide Range ◽  
Nanoscale Level

In the present work, we propose that a one-dimensional quantum heterostructure composed of magnetic and non-magnetic (NM) atomic sites can be utilized as a spin filter for a wide range of applied bias voltage. A simple tight-binding framework is given to describe the conducting junction where the heterostructure is coupled to two semi-infinite one-dimensional NM electrodes. Based on transfer matrix method, all the calculations are performed numerically which describe two-terminal spin-dependent transmission probability along with junction current through the wire. Our detailed analysis may provide fundamental aspects of selective spin transport phenomena in one-dimensional heterostructures at nanoscale level.

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