Gate-Tunable Spin-Orbit Coupling in a Germanium Hole Double Quantum Dot

被引：17

作者：

Liu, He ^{[1
,2
]}

Zhang, Ting ^{[1
,2
]}

Wang, Ke ^{[1
,2
]}

Gao, Fei ^{[3
,4
]}

Xu, Gang ^{[1
,2
]}

Zhang, Xin ^{[1
,2
]}

Li, Shu-Xiao ^{[1
,2
]}

Cao, Gang ^{[1
,2
]}

Wang, Ting ^{[3
,4
]}

Zhang, Jianjun ^{[3
,4
]}

Hu, Xuedong ^{[5
]}

Li, Hai-Ou ^{[1
,2
]}

Guo, Guo-Ping ^{[1
,2
,6
]}

机构：

[1] Univ Sci & Technol China, CAS Key Lab Quantum Informat, Hefei 230026, Anhui, Peoples R China

[2] Univ Sci & Technol China, CAS Ctr Excellence & Synerget Innovat Ctr Quantum, Hefei 230026, Anhui, Peoples R China

[3] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[4] Chinese Acad Sci, CAS Ctr Excellence Topol Quantum Computat, Beijing 100190, Peoples R China

[5] SUNY Buffalo, Dept Phys, Buffalo, NY 14260 USA

[6] Origin Quantum Comp Co Ltd, Hefei 230026, Anhui, Peoples R China

来源：

PHYSICAL REVIEW APPLIED | 2022年 / 17卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Decoherence - Double quantum dots - Germaniums (Ge) - Hole spin - Hyperfine interactions - Quantum dot systems - Spin manipulation - Spin-orbit couplings - Spin-orbit interaction - Tunables;

D O I：

10.1103/PhysRevApplied.17.044052

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Hole spins confined in semiconductor quantum dot systems have gained considerable interest for their strong spin-orbit interactions (SOIs) and relatively weak hyperfine interactions. Here, we experimentally demonstrate a tunable SOI in a double quantum dot in a germanium (Ge) hut wire (HW), which could help to enable fast all-electric spin manipulations while suppressing unwanted decoherence. Specifically, we measure the transport spectra in the Pauli-spin-blockade regime in the double-quantum-dot device. By adjusting the interdot tunnel coupling, we obtain an electric-field-tuned spin-orbit length of lSO= 2.0???48.9 nm. This tunability of the SOI could pave the way toward the realization of high-fidelity qubits in Ge HW systems.

引用

页数：9

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