Quantitative Estimation of Exchange Interaction Energy Using Two-Electron Vertical Double Quantum Dots

被引：22

作者：

Kodera, T. ^{[1
]}

Ono, K. ^{[2
]}

Kitamura, Y. ^{[3
]}

Tokura, Y. ^{[4
,5
]}

Arakawa, Y. ^{[1
,6
]}

Tarucha, S. ^{[1
,3
,4
]}

机构：

[1] Univ Tokyo, Inst Nano Quantum Informat Elect, Meguro Ku, Tokyo 1538505, Japan

[2] RIKEN, Wako, Saitama 3510198, Japan

[3] Univ Tokyo, Sch Engn, Bunkyo Ku, Tokyo 1138656, Japan

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

[5] NTT Basic Res Labs, Atsugi, Kanagawa 2430198, Japan

[6] Univ Tokyo, Inst Ind Sci, Adv Sci & Technol Res Ctr, Meguro Ku, Tokyo 1538505, Japan

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 14期

关键词：

SPIN; MANIPULATION;

D O I：

10.1103/PhysRevLett.102.146802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We use Pauli-spin blockade in two-electron vertical double quantum dots to quantitatively estimate the exchange energy J in a wide range of interdot level detuning Delta and fully compare it with calculations. Pauli-spin blockade is lifted via a singlet- (S-)triplet (T) transition mediated by hyperfine coupling, which abruptly occurs in our devices when the S-T transition energy or J is compensated by the Zeeman energy. We use this feature to derive J depending on Delta between the S-S and T-T resonances. The obtained J versus Delta including the resonance effect is perfectly reproduced by Hubbard model calculations.

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页数：4

相关论文

共 25 条

[1] GaAs/AlGaAs/InGaAs vertical triple barrier single electron transistors [J].

Austing, DG ;

Honda, T ;

Tarucha, S .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS, 1997, 36 (3B) :1667-1671

[2] Large nuclear overhauser fields detected in vertically coupled double quantum dots [J].

Baugh, Jonathan ;

Kitamura, Yosuke ;

Ono, Keiji ;

Tarucha, Seigo .

PHYSICAL REVIEW LETTERS, 2007, 99 (09)

[3] Selective dynamic nuclear spin polarization in a spin-blocked double dot [J].

Deng, CX ;

Hu, XD .

PHYSICAL REVIEW B, 2005, 71 (03)

[4] Note to the Quantification of the harmonic Oscillator in a Magnetic Field [J].

Fock, V. .

ZEITSCHRIFT FUR PHYSIK, 1928, 47 (5-6) :446-448

[5] Zeeman energy and spin relaxation in a one-electron quantum dot [J].

Hanson, R ;

Witkamp, B ;

Vandersypen, LMK ;

van Beveren, LHW ;

Elzerman, JM ;

Kouwenhoven, LP .

PHYSICAL REVIEW LETTERS, 2003, 91 (19)

[6] Single-electron delocalization in hybrid vertical-lateral double quantum dots [J].

Hatano, T ;

Stopa, M ;

Tarucha, S .

SCIENCE, 2005, 309 (5732) :268-271

[7] Triplet-singlet spin relaxation via nuclei in a double quantum dot [J].

Johnson, AC ;

Petta, JR ;

Taylor, JM ;

Yacoby, A ;

Lukin, MD ;

Marcus, CM ;

Hanson, MP ;

Gossard, AC .

NATURE, 2005, 435 (7044) :925-928

[8] High-frequency manipulation of few-electron double quantum dots - toward spin qubits [J].

Kodera, T ;

van der Wiel, WG ;

Ono, K ;

Sasaki, S ;

Fujisawa, T ;

Tarucha, S .

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, 2004, 22 (1-3) :518-521

[9] Singlet-triplet transition induced by Zeeman energy in weakly coupled vertical double quantum dots [J].

Kodera, Tetsuo ;

Ono, Keiji ;

Amaha, Shinichi ;

Tokura, Yasuhiro ;

Arakawa, Yasuhiko ;

Tarucha, Seigo .

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, 2008, 40 (05) :1139-1141

[10] Driven coherent oscillations of a single electron spin in a quantum dot [J].

Koppens, F. H. L. ;

Buizert, C. ;

Tielrooij, K. J. ;

Vink, I. T. ;

Nowack, K. C. ;

Meunier, T. ;

Kouwenhoven, L. P. ;

Vandersypen, L. M. K. .

NATURE, 2006, 442 (7104) :766-771