Singlet-triplet transitions in highly correlated nanowire quantum dots

Y. T. Chen; C. C. Chao; S. Y. Huang; C. S. Tang; Shun-Jen Cheng

doi:10.1016/j.physe.2009.11.084

Singlet-triplet transitions in highly correlated nanowire quantum dots

Y. T. Chen, C. C. Chao, S. Y. Huang, C. S. Tang, Shun-Jen Cheng^*

^*此作品的通信作者

電子物理學系

研究成果: Article › 同行評審

1 引文斯高帕斯（Scopus）

摘要

We consider a quantum dot embedded in a three-dimensional nanowire with tunable aspect ratio a. A configuration interaction theory is developed to calculate the energy spectra of the finite 1D quantum dot systems charged with two electrons in the presence of magnetic fields B along the wire axis. Fruitful singlet-triplet transition behaviors are revealed and explained in terms of the competing exchange interaction, correlation interaction, and spin-Zeeman energy. In the high aspect ratio regime, the singlet-triplet transitions are shown designable by tuning the parameters a and B. The transition also manifest the highly correlated nature of long nanowire quantum dots.

原文	English
頁（從 - 到）	837-840
頁數	4
期刊	Physica E: Low-Dimensional Systems and Nanostructures
卷	42
發行號	4
DOIs	https://doi.org/10.1016/j.physe.2009.11.084
出版狀態	Published - 2月 2010

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title = "Singlet-triplet transitions in highly correlated nanowire quantum dots",

abstract = "We consider a quantum dot embedded in a three-dimensional nanowire with tunable aspect ratio a. A configuration interaction theory is developed to calculate the energy spectra of the finite 1D quantum dot systems charged with two electrons in the presence of magnetic fields B along the wire axis. Fruitful singlet-triplet transition behaviors are revealed and explained in terms of the competing exchange interaction, correlation interaction, and spin-Zeeman energy. In the high aspect ratio regime, the singlet-triplet transitions are shown designable by tuning the parameters a and B. The transition also manifest the highly correlated nature of long nanowire quantum dots.",

keywords = "Correlation, Exchange, Nanowire quantum dot, Singlet-triplet transition",

author = "Chen, {Y. T.} and Chao, {C. C.} and Huang, {S. Y.} and Tang, {C. S.} and Shun-Jen Cheng",

year = "2010",

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doi = "10.1016/j.physe.2009.11.084",

language = "English",

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TY - JOUR

T1 - Singlet-triplet transitions in highly correlated nanowire quantum dots

AU - Chen, Y. T.

AU - Chao, C. C.

AU - Huang, S. Y.

AU - Tang, C. S.

AU - Cheng, Shun-Jen

PY - 2010/2

Y1 - 2010/2

N2 - We consider a quantum dot embedded in a three-dimensional nanowire with tunable aspect ratio a. A configuration interaction theory is developed to calculate the energy spectra of the finite 1D quantum dot systems charged with two electrons in the presence of magnetic fields B along the wire axis. Fruitful singlet-triplet transition behaviors are revealed and explained in terms of the competing exchange interaction, correlation interaction, and spin-Zeeman energy. In the high aspect ratio regime, the singlet-triplet transitions are shown designable by tuning the parameters a and B. The transition also manifest the highly correlated nature of long nanowire quantum dots.

AB - We consider a quantum dot embedded in a three-dimensional nanowire with tunable aspect ratio a. A configuration interaction theory is developed to calculate the energy spectra of the finite 1D quantum dot systems charged with two electrons in the presence of magnetic fields B along the wire axis. Fruitful singlet-triplet transition behaviors are revealed and explained in terms of the competing exchange interaction, correlation interaction, and spin-Zeeman energy. In the high aspect ratio regime, the singlet-triplet transitions are shown designable by tuning the parameters a and B. The transition also manifest the highly correlated nature of long nanowire quantum dots.

KW - Correlation

KW - Exchange

KW - Nanowire quantum dot

KW - Singlet-triplet transition

UR - http://www.scopus.com/inward/record.url?scp=77149126210&partnerID=8YFLogxK

U2 - 10.1016/j.physe.2009.11.084

DO - 10.1016/j.physe.2009.11.084

M3 - Article

AN - SCOPUS:77149126210

SN - 1386-9477

VL - 42

SP - 837

EP - 840

JO - Physica E: Low-Dimensional Systems and Nanostructures

JF - Physica E: Low-Dimensional Systems and Nanostructures

IS - 4

ER -

Singlet-triplet transitions in highly correlated nanowire quantum dots

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