Observation of interdot tunneling process of spin-polarized electrons

A. Tackeuchi; Y. Nakata; R. Sasou; K. Mase; T. Kuroda; N. Yokoyama

doi:10.1016/S1386-9477(01)00048-0

Observation of interdot tunneling process of spin-polarized electrons

A. Tackeuchi^*, Y. Nakata, R. Sasou, K. Mase, T. Kuroda, N. Yokoyama

^*この研究の対応する著者

先進理工学部

研究成果: Article › 査読

8 被引用数 (Scopus)

抄録

We have directly observed the spin-polarized electron tunneling process between double quantum dots (QDs) using spin-dependent time-resolved photoluminescence measurements. The spin relaxation times in isolated In_0.9Al_0.1As Stranski-Krastanow (SK)-mode QDs and InAs SK-mode QDs were measured as 1.3 and 1.2 ns, respectively. The fact that these times are longer than those of quantum wells indicates that the spin relaxation rate is suppressed in QDs by the increased zero dimensionality. The measurement of tunneling between double QDs which consist of In_0.9Al_0.1As QDs and InAs QDs indicates that the spin relaxation time is not affected by the tunneling process. The spin-polarized carriers were found to tunnel from one dot to another dot while retaining spin polarization.

本文言語	English
ページ（範囲）	32-35
ページ数	4
ジャーナル	Physica E: Low-Dimensional Systems and Nanostructures
巻	10
号	1-3
DOI	https://doi.org/10.1016/S1386-9477(01)00048-0
出版ステータス	Published - 2001 5月

ASJC Scopus subject areas

電子材料、光学材料、および磁性材料
原子分子物理学および光学
凝縮系物理学

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10.1016/S1386-9477(01)00048-0

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@article{33ee54ccf9c54e5e82ca7af9e67241a1,

title = "Observation of interdot tunneling process of spin-polarized electrons",

abstract = "We have directly observed the spin-polarized electron tunneling process between double quantum dots (QDs) using spin-dependent time-resolved photoluminescence measurements. The spin relaxation times in isolated In0.9Al0.1As Stranski-Krastanow (SK)-mode QDs and InAs SK-mode QDs were measured as 1.3 and 1.2 ns, respectively. The fact that these times are longer than those of quantum wells indicates that the spin relaxation rate is suppressed in QDs by the increased zero dimensionality. The measurement of tunneling between double QDs which consist of In0.9Al0.1As QDs and InAs QDs indicates that the spin relaxation time is not affected by the tunneling process. The spin-polarized carriers were found to tunnel from one dot to another dot while retaining spin polarization.",

keywords = "Quantum dots, Spin, Spin relaxation, Tunnel",

author = "A. Tackeuchi and Y. Nakata and R. Sasou and K. Mase and T. Kuroda and N. Yokoyama",

note = "Funding Information: This work was supported in part by the High-Tech Research Center Project from the Ministry of Education, Science, Sports and Culture and also by a Waseda University Grant for Special Research Projects.",

year = "2001",

month = may,

doi = "10.1016/S1386-9477(01)00048-0",

language = "English",

volume = "10",

pages = "32--35",

journal = "Physica E: Low-Dimensional Systems and Nanostructures",

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publisher = "Elsevier",

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TY - JOUR

T1 - Observation of interdot tunneling process of spin-polarized electrons

AU - Tackeuchi, A.

AU - Nakata, Y.

AU - Sasou, R.

AU - Mase, K.

AU - Kuroda, T.

AU - Yokoyama, N.

N1 - Funding Information: This work was supported in part by the High-Tech Research Center Project from the Ministry of Education, Science, Sports and Culture and also by a Waseda University Grant for Special Research Projects.

PY - 2001/5

Y1 - 2001/5

N2 - We have directly observed the spin-polarized electron tunneling process between double quantum dots (QDs) using spin-dependent time-resolved photoluminescence measurements. The spin relaxation times in isolated In0.9Al0.1As Stranski-Krastanow (SK)-mode QDs and InAs SK-mode QDs were measured as 1.3 and 1.2 ns, respectively. The fact that these times are longer than those of quantum wells indicates that the spin relaxation rate is suppressed in QDs by the increased zero dimensionality. The measurement of tunneling between double QDs which consist of In0.9Al0.1As QDs and InAs QDs indicates that the spin relaxation time is not affected by the tunneling process. The spin-polarized carriers were found to tunnel from one dot to another dot while retaining spin polarization.

AB - We have directly observed the spin-polarized electron tunneling process between double quantum dots (QDs) using spin-dependent time-resolved photoluminescence measurements. The spin relaxation times in isolated In0.9Al0.1As Stranski-Krastanow (SK)-mode QDs and InAs SK-mode QDs were measured as 1.3 and 1.2 ns, respectively. The fact that these times are longer than those of quantum wells indicates that the spin relaxation rate is suppressed in QDs by the increased zero dimensionality. The measurement of tunneling between double QDs which consist of In0.9Al0.1As QDs and InAs QDs indicates that the spin relaxation time is not affected by the tunneling process. The spin-polarized carriers were found to tunnel from one dot to another dot while retaining spin polarization.

KW - Quantum dots

KW - Spin

KW - Spin relaxation

KW - Tunnel

UR - http://www.scopus.com/inward/record.url?scp=0035337560&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035337560&partnerID=8YFLogxK

U2 - 10.1016/S1386-9477(01)00048-0

DO - 10.1016/S1386-9477(01)00048-0

M3 - Article

AN - SCOPUS:0035337560

VL - 10

SP - 32

EP - 35

JO - Physica E: Low-Dimensional Systems and Nanostructures

JF - Physica E: Low-Dimensional Systems and Nanostructures

SN - 1386-9477

IS - 1-3

ER -

Observation of interdot tunneling process of spin-polarized electrons

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ASJC Scopus subject areas

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