Spin-polarized transport in adiabatic quantum point contact with strong Rashba spin–orbit interaction

We first report 0.5(2 e 2/ h) conductance quantization in adiabatic quantum point contacts (QPCs) fabricated at high In-content InGaAs/InAlAs single heterojunctions under no magnetic field. This quantization seems difficult to understand, since the spin one-dimensional (1D) subbands in the QPCs are...

Full description

Saved in:
Bibliographic Details
Published in:Solid state communications 2005-11, Vol.136 (8), p.479-483
Main Authors: Kita, T., Kakegawa, T., Akabori, M., Yamada, S.
Format: Article
Language:English
Subjects:
A. Narrow-gap semiconductor
Condensed matter: electronic structure, electrical, magnetic, and optical properties
D. Quantum point contact
D. Spin-polarized transport
D. Spin–orbit interaction
Electronic transport in condensed matter
Exact sciences and technology
Physics
Spin polarized transport
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We first report 0.5(2 e 2/ h) conductance quantization in adiabatic quantum point contacts (QPCs) fabricated at high In-content InGaAs/InAlAs single heterojunctions under no magnetic field. This quantization seems difficult to understand, since the spin one-dimensional (1D) subbands in the QPCs are generally degenerated when B=0. However, this observation is reproducible in various QPC samples with different dimensions but not likely so definite as the conductance quantization in usual QPCs. It is noted that this particular heterojunction 2DEG is found to have high electron mobility of
ISSN:0038-1098
1879-2766
DOI:10.1016/j.ssc.2005.08.029