Spin-flip transitions in self-assembled quantum dots. (8th November 2017)

• Record Type: Journal Article
• Authors: Stavrou, V N
• Is Part Of: Journal of physics. Volume 29:Number 48(2017)
• Publication Date: 2017-11-08
• Subjects: qubits -- quantum dot -- phonons -- scattering rates; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/1361-648X/aa9590
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: Detailed realistic calculations of the spin-flip time ( T 1 ) for an electron in a self-assembled quantum dot (SAQD) due to emission of an acoustic phonon, using only bulk properties with no fitting parameters, are presented. Ellipsoidal lens shaped I n x G a 1 − x As quantum dots, with electronic states calculated using 8-band strain dependent k ⋅ p theory, are considered. The phonons are treated as bulk acoustic phonons coupled to the electron by both deformation potential and piezoelectric interactions. The dependence of T 1 on the geometry of SAQD, on the applied external magnetic field and on the lattice temperature is highlighted. The theoretical results are close to the experimental measurements on the spin-flip times for a single electron in QD.