Spin transport through a multimode quantum wire with Rashba spin orbit coupling under terahertz radiation

Author(s):  
B. H. Wu ◽  
J. C. Cao
2006 ◽  
Vol 23 (11) ◽  
pp. 3065-3068 ◽  
Author(s):  
Wang Yi ◽  
Sheng Wei ◽  
Zhou Guang-Hui

2010 ◽  
Vol 24 (07) ◽  
pp. 649-656
Author(s):  
XI FU ◽  
GUANGHUI ZHOU

We investigate theoretically the spin current and spin current induced electric field in a weak Rashba spin-orbit coupling quantum wire (QW) using a definition for spin current by means of scattering matrix. It is found that there exists two non-zero linear spin current density elements which have oscillation peaks at the center of QW and their strengths can be changed by the number of propagation modes and Rashba constant, respectively. Moreover, the spin current induced electric field has also been calculated and its strength is measurable with present technology with which can be used to detect spin current.


2014 ◽  
Vol 4 (1) ◽  
Author(s):  
Fuhong Mei ◽  
Shan Zhang ◽  
Ning Tang ◽  
Junxi Duan ◽  
Fujun Xu ◽  
...  

2011 ◽  
Vol 25 (07) ◽  
pp. 487-496
Author(s):  
XI FU ◽  
ZESHUN CHEN ◽  
FENG ZHONG ◽  
YONGHONG KONG

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.


2016 ◽  
Vol 98 ◽  
pp. 473-491
Author(s):  
Xiao-Dong Tan ◽  
Xiao-Ping Liao ◽  
Litao Sun

Sign in / Sign up

Export Citation Format

Share Document