Energy-dependent tunneling from few-electron dynamic quantum dots

被引：44

作者：

Astley, M. R.

Kataoka, M.

Ford, C. J. B.

Barnes, C. H. W.

Anderson, D.

Jones, G. A. C.

Farrer, I.

Ritchie, D. A.

Pepper, M.

机构：

[1] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[2] Cambridge Res Lab, Toshiba Res Europe Ltd, Cambridge CB4 0WE, England

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 15期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1103/PhysRevLett.99.156802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We measure the electron escape rate from surface-acoustic-wave dynamic quantum dots (QDs) through a tunnel barrier. Rate equations are used to extract the tunneling rates, which change by an order of magnitude with tunnel-barrier-gate voltage. We find that the tunneling rates depend on the number of electrons in each dynamic QD because of Coulomb energy. By comparing this dependence to a saddle-point-potential model, the addition energies of the second and third electron in each dynamic QD are estimated. The scale (similar to a few meV) is comparable to those in static QDs as expected.

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页数：4

相关论文

共 25 条

[1] Quantum computation using electrons trapped by surface acoustic waves [J].

Barnes, CHW ;

Shilton, JM ;

Robinson, AN .

PHYSICAL REVIEW B, 2000, 62 (12) :8410-8419

[2] QUANTIZED TRANSMISSION OF A SADDLE-POINT CONSTRICTION [J].

BUTTIKER, M .

PHYSICAL REVIEW B, 1990, 41 (11) :7906-7909

[3] Addition spectrum of a lateral dot from Coulomb and spin-blockade spectroscopy [J].

Ciorga, M ;

Sachrajda, AS ;

Hawrylak, P ;

Gould, C ;

Zawadzki, P ;

Jullian, S ;

Feng, Y ;

Wasilewski, Z .

PHYSICAL REVIEW B, 2000, 61 (24) :16315-16318

[4] ON ANALYTICAL DESCRIPTION OF RESONANCE TUNNELLING REACTIONS [J].

CONNOR, JNL .

MOLECULAR PHYSICS, 1968, 15 (01) :37-&

[5] Direct observation of single-electron decay from an artificial nucleus [J].

Cooper, J ;

Smith, CG ;

Ritchie, DA ;

Linfield, EH ;

Jin, Y ;

Launois, H .

PHYSICA E, 2000, 6 (1-4) :457-460

[6] MODELING THE PATTERNED 2-DIMENSIONAL ELECTRON-GAS - ELECTROSTATICS [J].

DAVIES, JH ;

LARKIN, IA ;

SUKHORUKOV, EV .

JOURNAL OF APPLIED PHYSICS, 1995, 77 (09) :4504-4512

[7] Excited-state spectroscopy on a nearly closed quantum dot via charge detection [J].

Elzerman, JM ;

Hanson, R ;

van Beveren, LHW ;

Vandersypen, LMK ;

Kouwenhoven, LP .

APPLIED PHYSICS LETTERS, 2004, 84 (23) :4617-4619

[8]

Elzerman JM, 2004, NATURE, V430, P431, DOI 10.1039/nature02693

[9] Coherent manipulation of electronic states in a double quantum dot [J].

Hayashi, T ;

Fujisawa, T ;

Cheong, HD ;

Jeong, YH ;

Hirayama, Y .

PHYSICAL REVIEW LETTERS, 2003, 91 (22)

[10] The effect of pulse-modulated surface acoustic waves on acoustoelectric current quantization [J].

Kataoka, M. ;

Ford, C. J. B. ;

Barnes, C. H. W. ;

Anderson, D. ;

Jones, G. A. C. ;

Beere, H. E. ;

Ritchie, D. A. ;

Pepper, M. .

JOURNAL OF APPLIED PHYSICS, 2006, 100 (06)