Open AccessAnomalous Hanle curves induced by in-plane nuclear field in single self-assembled InAlAs and InAs nanostructures
Author(s) -
Shoji Yamamoto,
Ryosuke Matsusaki,
R. Kaji,
S. Adachi
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1220/1/012047
Subject(s) - hanle effect , condensed matter physics , quadrupole , polarization (electrochemistry) , quantum dot , physics , magnetic field , field (mathematics) , electron , spin polarization , spin (aerodynamics) , atomic physics , chemistry , quantum mechanics , mathematics , pure mathematics , thermodynamics
We studied the formation mechanism of in-plane nuclear field by anomalous Hanle effect measurements in single self-assembled In 0.75 Al 0.25 As/Al 0.3 Ga 0.7 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.