Rectangular model of a ballistic spin interferometer in (001) InGaAs/InAlAs quantum wells

✍ Scribed by Takaaki Koga; S. Faniel; S. Mineshige; T. Mastuura; Y. Sekine

• Publisher: Elsevier
• Year: 2010
• Tongue: English
• Weight: 1015 KB
• Volume: 3
• Category: Article
• ISSN: 1875-3892
• DOI: 10.1016/j.phpro.2010.01.185

✦ Synopsis

We report an unambiguous detection of the crytalline anisotropy of the spin-orbit interaction in (001) InAlAs/InGaAs/InAlAs quantum wells using nanofabricated rectangular loop arrays, where the sides of the constituent loops are aligned along either the [110] or [ ¯ 110] crystallographic axis. The fabrication and measurements were performed on the epi-wafer samples whose spin properties were characterized previously [Koga et al., Phys. Rev. Lett 89, 046801 (2002)]. We find that the experimentally observed spin interference patterns the amplitude modulation of the Al'tshuler-Aronov-Spivak oscillations as a function of the gate voltage are in good agreement with the results of the spin interferometer model extended for rectangular loops and including both the Rashba and Dresselhaus spin-orbit interactions.