Pauli spin blockade in carbon nanotube double quantum dots

被引：41

作者：

Buitelaar, M. R. ^{[1
]}

Fransson, J. ^{[2
]}

Cantone, A. L. ^{[1
]}

Smith, C. G. ^{[1
]}

Anderson, D. ^{[1
]}

Jones, G. A. C. ^{[1
]}

Ardavan, A. ^{[3
]}

Khlobystov, A. N. ^{[4
]}

Watt, A. A. R. ^{[4
]}

Porfyrakis, K. ^{[4
]}

Briggs, G. A. D. ^{[4
]}

机构：

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

[2] Uppsala Univ, Dept Phys & Mat Sci, Uppsala 75121, Sweden

[3] Univ Oxford, Clarendon Lab, Oxford OX1 3PU, England

[4] Univ Oxford, Dept Mat, Oxford OX1 3PH, England

来源：

PHYSICAL REVIEW B | 2008年 / 77卷 / 24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/PhysRevB.77.245439

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report Pauli spin blockade in a carbon nanotube double quantum dot defined by tunnel barriers at the contacts and a structural defect in the nanotube. We observe a pronounced current suppression for negative source-drain bias voltages, which is investigated for both symmetric and asymmetric coupling of the quantum dots to the leads. The measured differential conductance agrees well with a theoretical model of a double quantum dot system in the spin-blockade regime, which allows us to estimate the occupation probabilities of the relevant singlet and triplet states. This work shows that effective spin-to-charge conversion in nanotube quantum dots is feasible and opens the possibility of single-spin readout in a material that is not limited by hyperfine interaction with nuclear spins.

引用

页数：6

共 27 条

[1] Spin-orbit interaction in carbon nanotubes [J].

Ando, T .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2000, 69 (06) :1757-1763

[2] Resonant electron scattering by defects in single-walled carbon nanotubes [J].

Bockrath, M ;

Liang, WJ ;

Bozovic, D ;

Hafner, JH ;

Lieber, CM ;

Tinkham, M ;

Park, HK .

SCIENCE, 2001, 291 (5502) :283-285

[3] Spin-orbit interaction and anomalous spin relaxation in carbon nanotube quantum dots [J].

Bulaev, Denis V. ;

Trauzettel, Bjoern ;

Loss, Daniel .

PHYSICAL REVIEW B, 2008, 77 (23)

[4] Spin splitting and even-odd effects in carbon nanotubes [J].

Cobden, DH ;

Bockrath, M ;

McEuen, PL ;

Rinzler, AG ;

Smalley, RE .

PHYSICAL REVIEW LETTERS, 1998, 81 (03) :681-684

[5] Pauli spin blockade in weakly coupled double quantum dots [J].

Fransson, J. ;

Rasander, M. .

PHYSICAL REVIEW B, 2006, 73 (20)

[6] Allowed and forbidden transitions in artificial hydrogen and helium atoms [J].

Fujisawa, T ;

Austing, DG ;

Tokura, Y ;

Hirayama, Y ;

Tarucha, S .

NATURE, 2002, 419 (6904) :278-281

[7]

GE L, ARXIV07103061

[8] Molecular states in carbon nanotube double quantum dots [J].

Graeber, M. R. ;

Coish, W. A. ;

Hoffmann, C. ;

Weiss, M. ;

Furer, J. ;

Oberholzer, S. ;

Loss, D. ;

Schoenenberger, C. .

PHYSICAL REVIEW B, 2006, 74 (07)

[9] Spin-orbit coupling in curved graphene, fullerenes, nanotubes, and nanotube caps [J].

Huertas-Hernando, Daniel ;

Guinea, F. ;

Brataas, Arne .

PHYSICAL REVIEW B, 2006, 74 (15)

[10] Singlet-triplet spin blockade and charge sensing in a few-electron double quantum dot [J].

Johnson, AC ;

Petta, JR ;

Marcus, CM ;

Hanson, MP ;

Gossard, AC .

PHYSICAL REVIEW B, 2005, 72 (16)

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