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Spin decoherence of a confined exciton due to one‐ and two‐phonon assisted transitions

Title data

Roszak, Katarzyna ; Machnikowski, Paweł ; Axt, Vollrath M. ; Kuhn, Tilmann:
Spin decoherence of a confined exciton due to one‐ and two‐phonon assisted transitions.
In: Caldas, Marília J. ; Studart, Nelson (ed.): Physics of semiconductors. - Melville, NY : American Inst. of Physics , 2010 . - pp. 413-414 . - (AIP Conference Proceedings ; 1199 )
ISBN 978-0-7354-0736-7
DOI: https://doi.org/10.1063/1.3295479

Abstract in another language

Exciton spin decay in a self‐assembled InAs/GaAs quantum dot is studied. The spin relaxation results from an interplay of two factors: the Bir‐Pikus Hamiltonian and the short‐range exchange interaction, leading to one‐ and two‐phonon assisted transitions. We establish a hierarchy between the resulting transition rates; the one‐phonon assisted transition to dark states is the fastest process. We also show the dominating role of transverse phonons for all of the transitions.

Further data

Item Type: Article in a book
Refereed: Yes
Keywords: quantum dot; non-linear optics; ultrafast dynamics; phonons; excitons; Pikus Bir interaction; spin-orbit coupling; dark states; short range exchange interaction; spin relaxation; exciton spin; decoherence; spintronics
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics III > Chair Theoretical Physics III - Univ.-Prof. Dr. Martin Axt
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics III
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 06 Nov 2017 13:32
Last Modified: 06 Nov 2017 13:32
URI: https://eref.uni-bayreuth.de/id/eprint/40211