Nature of tunable hole g factors in quantum dots

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...

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Bibliographic Details
Authors: Ares, N., Golovach, Vitaly N., Katsaros, G., Stoffel, M., Glazman, L. I., Schmidt, O. G., Franceschi, Silvano de
Format: article
Status:Published version
Publication Date:2013
Country:España
Institution:Consejo Superior de Investigaciones Científicas (CSIC)
Repository:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/102513
Online Access:http://hdl.handle.net/10261/102513
Access Level:Open access
Description
Summary: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. © 2013 American Physical Society.

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