Manipulation of exchange coupling energy in a few-electron double quantum dot

被引：23

作者：

Hatano, T. ^{[1
]}

Amaha, S. ^{[1
]}

Kubo, T. ^{[1
]}

Tokura, Y. ^{[1
,2
]}

Nishi, Y. ^{[3
]}

Hirayama, Y. ^{[2
,4
]}

Tarucha, S. ^{[1
,5
]}

机构：

[1] JST, ICORP, Quantum Spin Informat Project, Atsugi, Kanagawa 2430198, Japan

[2] NTT Corp, NTT Basic Res Labs, Atsugi, Kanagawa 2430198, Japan

[3] Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan

[4] JST, SORST, Atsugi, Kanagawa 2430198, Japan

[5] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan

来源：

PHYSICAL REVIEW B | 2008年 / 77卷 / 24期

关键词：

D O I：

10.1103/PhysRevB.77.241301

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have used a hybrid vertical-lateral double quantum dot to study the excitation energy spectrum for one- and two-electron states, which are effectively formed on top of a certain core shell. We have observed bonding and antibonding states, and exchange coupled singlet and triplet states for the one- and two-electron states, respectively, and derived the interdot tunnel coupling and exchange coupling energies for various parameters of interdot level detuning, central gate voltage and magnetic field. The obtained exchange coupling energy is consistently reproduced by calculation using the Hund-Mulliken method.

引用

页数：4

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