Noncollinear Spin-Orbit Magnetic Fields in a Carbon Nanotube Double Quantum Dot

被引：10
|
作者：
Hels, M. C. [1 ,2 ]
Braunecker, B. [3 ]
Grove-Rasmussen, K. [1 ,2 ]
Nygard, J. [1 ,2 ]
机构：
[1] Univ Copenhagen, Ctr Quantum Devices, Niels Bohr Inst, Univ Pk 5, DK-2100 Copenhagen O, Denmark
[2] Univ Copenhagen, Niels Bohr Inst, Nanosci Ctr, Univ Pk 5, DK-2100 Copenhagen O, Denmark
[3] Univ St Andrews, Sch Phys & Astron, SUPA, St Andrews KY16 9SS, Fife, Scotland
来源：
PHYSICAL REVIEW LETTERS | 2016年 / 117卷 / 27期
基金：
新加坡国家研究基金会;
关键词：
SINGLE-ELECTRON SPIN; RESONANCE; QUBIT;
D O I：
10.1103/PhysRevLett.117.276802
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We demonstrate experimentally that noncollinear intrinsic spin-orbit magnetic fields can be realized in a curved carbon nanotube two-segment device. Each segment, analyzed in the quantum dot regime, shows near fourfold degenerate shell structure allowing for identification of the spin-orbit coupling and the angle between the two segments. Furthermore, we determine the four unique spin directions of the quantum states for specific shells and magnetic fields. This class of quantum dot systems is particularly interesting when combined with induced superconducting correlations as it may facilitate unconventional superconductivity and detection of Cooper pair entanglement. Our device comprises the necessary elements.
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页数：5
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