Nature of tunable hole g factors in quantum dots Journal Article


Author(s): Ares, Natalia; Golovach, Vitaly N; Katsaros, Georgios; Stoffel, Mathieu; Fournel, Frank; Glazman, Leonid I; Schmidt, Oliver G; De Franceschi, Silvano
Article Title: Nature of tunable hole g factors in quantum dots
Affiliation
Abstract: We report an electric-field-induced giant modulation of the hole g factor in SiGe nanocrystals. The observed effect is ascribed to a so-far overlooked contribution to the g factor that stems from the mixing between heavy- and light-hole wave functions. We show that the relative displacement between the confined heavy- and light-hole states, occurring upon application of the electric field, alters their mixing strength leading to a strong nonmonotonic modulation of the g factor.
Keywords: Modulation; G factors; Nonmonotonic; Relative displacement; SiGe nanocrystals, Electric fields; Mixing
Journal Title: Physical Review Letters
Volume: 110
Issue 4
ISSN: 1079-7114
Publisher: American Physical Society  
Date Published: 2013-01-23
Start Page: Article number 046602
URL:
DOI: 10.1103/PhysRevLett.110.046602
Notes: We acknowledge financial support from the Nanosciences Foundation (Grenoble, France), DOE under Contract No. DEFG02-08ER46482 (Yale), the Agence Nationale de la Recherche, and the European Starting Grant. G.‚ÄČK. acknowledges support from the European Commission via a Marie Curie Carrer Integration Grant and the FWF for a Lise-Meitner Fellowship
Open access: yes (repository)