Anomalous Hanle curves induced by in-plane nuclear field in single self-assembled InAlAs and InAs nanostructures. (May 2019)

• Record Type: Journal Article
• Authors: Yamamoto, S.; Matsusaki, R.; Kaji, R.; Adachi, S.
• Is Part Of: Journal of physics. Volume 1220(2019)
• Publication Date: 2019-05
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/1220/1/012047
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: We studied the formation mechanism of in-plane nuclear field by anomalous Hanle effect measurements in single self-assembled In0.75 Al0.25 As/Al0.3 Ga0.7 As quantum dots and InAs/GaAs quantum rings. The observed anomalous Hanle curves indicated quite large width and hysteretic behavior to the externally applied magnetic field. These anomalies appears in both materials whose electron g factors have opposite sign each other, and cannot be reproduced by a traditional spin dynamics model. In this study, we show that a proposed spin dynamics model can explain the formation of a large in-plane nuclear field regardless of the sign of electron g factor. The model is based on the dynamic nuclear spin polarization mechanism including the effects of nuclear quadrupole interaction.