Third stable branch and tristability of nuclear spin polarizations in a single quantum dot system


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PhysRevB.101.245424.pdf

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/78974

Title:	Third stable branch and tristability of nuclear spin polarizations in a single quantum dot system
Authors:	Yamamoto, S. Browse this author →KAKEN DB
	Kaji, R. Browse this author
	Sasakura, H. Browse this author →KAKEN DB
	Adachi, S. Browse this author →KAKEN DB
Issue Date:	17-Jun-2020
Publisher:	American Physical Society (APS)
Journal Title:	Physical Review B
Volume:	101
Issue:	24
Start Page:	245424
Publisher DOI:	10.1103/PhysRevB.101.245424
Abstract:	Semiconductor quantum dots provide a spin-coupled system of an electron and nuclei via enhanced hyperfine interaction. We showed that the nuclear spin polarization in single quantum dots can have three stable branches under a longitudinal magnetic field. The states were accompanied by hysteresis loops around the boundaries of each branch with a change in the excitation condition. To explain these findings, we incorporated the electron spin relaxation caused by the nuclear spin fluctuation into the previously studied dynamic nuclear spin polarization mechanism. The model reproduces the features of nuclear spin polarization and the associated strong reduction in the observed electron spin polarization, and can refer to the tristability of nuclear spin polarization.
Rights:	Copyright (2020) by The American Physical Society.
Type:	article
URI:	http://hdl.handle.net/2115/78974
Appears in Collections:	工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 足立智

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