Spin–orbit-induced hole spin relaxation in a quantum dot molecule: the effect of s-p  coupling. (17th June 2019)

• Record Type: Journal Article
• Authors: Kawa, Karol; Machnikowski, Paweł
• Is Part Of: Journal of physics. Volume 31:Number 35(2019)
• Publication Date: 2019-06-17
• Subjects: quantum dot molecule -- spin–orbit coupling -- spin relaxation -- phonons; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/1361-648X/ab243d
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: We study the effect of the coupling between the hole s shell of one quantum dot and the p shell in the other dot forming a vertically stacked self-assembled quantum dot molecule on the spin relaxation between the sublevels of the hole s state. Using an effective model that captures the spin–orbit effects in the p shell irrespective of their origin, we show that the strong spin mixing in the p shell can be transferred to the s shell of the other dot, leading to enhanced spin relaxation in a certain energy range around the s - p resonance if the dots are misaligned and the magnetic field is tilted from the sample plane.