Suppressing effective magnetic field and spin-relaxation rate by tuning barrier compositions in a (111) quantum well

Suppressing effective magnetic field and spin-relaxation rate by tuning barrier compositions in a (111) quantum well

Adjusting compositions of two barriers forming a (111)-oriented InGaAs/AlGaAsSb quantum well (QW) is proposed as a method to eliminate the effective magnetic field due to the Rashba and linear-in-momentum Dresselhaus spin-orbit interactions in the zeroth and first orders in the gate electric field....

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Veröffentlicht in:Japanese Journal of Applied Physics 2020-10, Vol.59 (10), p.100901
Hauptverfasser: Iijima, Tomonori, Egami, Yoshiyuki, Akera, Hiroshi
Format: Artikel
Sprache:eng
Schlagworte:
Composition
Electric fields
Magnetic fields
Magnetic induction
quantum well
Quantum wells
Room temperature
spin relaxation
spin-orbit interaction
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Zusammenfassung:Adjusting compositions of two barriers forming a (111)-oriented InGaAs/AlGaAsSb quantum well (QW) is proposed as a method to eliminate the effective magnetic field due to the Rashba and linear-in-momentum Dresselhaus spin-orbit interactions in the zeroth and first orders in the gate electric field. The resulting suppressed Dyakonov-Perel spin relaxation is used to achieve a high on/off ratio of the spin-relaxation rate at room temperature in a double-QW structure.
ISSN:0021-4922
1347-4065
DOI:10.35848/1347-4065/abb3d5