Spatial mapping and manipulation of two tunnel-coupled quantum dots

被引：16

作者：

Huefner, Magdalena ^{[1
]}

Kueng, Bruno ^{[1
]}

Schnez, Stephan ^{[1
]}

Ensslin, Klaus ^{[1
]}

Ihn, Thomas ^{[1
]}

Reinwald, Matthias ^{[2
]}

Wegscheider, Werner ^{[1
]}

机构：

[1] ETH, Solid State Phys Lab, CH-8093 Zurich, Switzerland

[2] Univ Regensburg, Inst Expt & Angew Phys, D-93040 Regensburg, Germany

来源：

PHYSICAL REVIEW B | 2011年 / 83卷 / 23期

关键词：

D O I：

10.1103/PhysRevB.83.235326

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The metallic tip of a scanning force microscope operated at 300 mK is used to locally induce a potential in a fully controllable double quantum dot defined via local anodic oxidation in a GaAs/AlGaAs heterostructure. Using scanning gate techniques we record spatial images of the current through the sample for different numbers of electrons on the quantum dots (i.e., for different quantum states). Owing to the spatial resolution of current maps, we are able to determine the spatial position of the individual quantum dots, and investigate their apparent relative shifts due to the voltage applied to a single gate.

引用

页数：6

共 17 条

[1] Imaging coherent transport in graphene (part I): mapping universal conductance fluctuations [J].

Berezovsky, J. ;

Borunda, M. F. ;

Heller, E. J. ;

Westervelt, R. M. .

NANOTECHNOLOGY, 2010, 21 (27)

[2] Scanned probe imaging of quantum dots inside InAs nanowires [J].

Bleszynski, Ania C. ;

Zwanenburg, Floris A. ;

Westervelt, R. M. ;

Roest, Aarnoud L. ;

Bakkers, Erik P. A. M. ;

Kouwenhoven, Leo P. .

NANO LETTERS, 2007, 7 (09) :2559-2562

[3]

BLESZYNSKIJAYIC.AC, 2008, NANOTECHNOLOGY, V77, P45327

[4] Conductance quantization at a half-integer plateau in a symmetric GaAs quantum wire [J].

Crook, R. ;

Prance, J. ;

Thomas, K. J. ;

Chorley, S. J. ;

Farrer, I. ;

Ritchie, D. A. ;

Pepper, M. ;

Smith, C. G. .

SCIENCE, 2006, 312 (5778) :1359-1362

[5] Imaging a single-electron quantum dot [J].

Fallahi, P ;

Bleszynski, AC ;

Westervelt, RM ;

Huang, J ;

Walls, JD ;

Heller, EJ ;

Hanson, M ;

Gossard, AC .

NANO LETTERS, 2005, 5 (02) :223-226

[6] Electronic properties of nanostructures defined in Ga[Al]As heterostructures by local oxidation [J].

Fuhrer, A ;

Dorn, A ;

Lüscher, S ;

Heinzel, T ;

Ensslin, K ;

Wegscheider, W ;

Bichler, M .

SUPERLATTICES AND MICROSTRUCTURES, 2002, 31 (01) :19-42

[7] Imaging and controlling electron transport inside a quantum ring [J].

Hackens, B. ;

Martins, F. ;

Ouisse, T. ;

Sellier, H. ;

Bollaert, S. ;

Wallart, X. ;

Cappy, A. ;

Chevrier, J. ;

Bayot, V. ;

Huant, S. .

NATURE PHYSICS, 2006, 2 (12) :826-830

[8] Spins in few-electron quantum dots [J].

Hanson, R. ;

Kouwenhoven, L. P. ;

Petta, J. R. ;

Tarucha, S. ;

Vandersypen, L. M. K. .

REVIEWS OF MODERN PHYSICS, 2007, 79 (04) :1217-1265

[9] Scanning gate microscopy measurements on a superconducting single-electron transistor [J].

Huefner, M. ;

May, C. ;

Kicin, S. ;

Ensslin, K. ;

Ihn, T. ;

Hilke, M. ;

Suter, K. ;

de Rooij, N. F. ;

Staufer, U. .

PHYSICAL REVIEW B, 2009, 79 (13)

[10] Spatially highly resolved study of AFM scanning tip-quantum dot local interaction [J].

Kicin, S ;

Pioda, A ;

Ihn, T ;

Sigrist, M ;

Fuhrer, A ;

Ensslin, K ;

Reinwald, M ;

Wegscheider, W .

NEW JOURNAL OF PHYSICS, 2005, 7

← 1 2 →