Gate-Controlled Quantum Interference Effects in a Clean Single-Wall Carbon Nanotube p-n Junction

被引：2

作者：

Deng, Xiaosong ^{[1
,2
]}

Gong, Kui ^{[3
]}

Wang, Yin ^{[3
]}

Liu, Zebin ^{[4
,5
]}

Jiang, Kaili ^{[4
,5
]}

Kang, Ning ^{[1
,2
,6
]}

Zhang, Zhiyong ^{[1
,2
]}

机构：

[1] Peking Univ, Key Lab Phys & Chem Nanodevices, Beijing 100871, Peoples R China

[2] Peking Univ, Ctr Carbon Based Elect, Sch Elect, Beijing 100871, Peoples R China

[3] Hongzhiwei Technol Shanghai Co Ltd, FL6,BLDG C2, 1599, Xinjinqiao Rd, Shanghai, Peoples R China

[4] Tsinghua Univ, Dept Phys, State Key Lab Low Dimens Quantum Phys, Beijing 100084, Peoples R China

[5] Tsinghua Univ, Tsinghua Foxconn Nanotechnol Res Ctr, Beijing 100084, Peoples R China

[6] Hefei Natl Lab, Hefei 230088, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2023年 / 130卷 / 20期

基金：

中国国家自然科学基金;

关键词：

OSCILLATIONS; TRANSPORT; GROWTH; GAP;

D O I：

10.1103/PhysRevLett.130.207002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The precise control and deep understanding of quantum interference in carbon nanotube (CNT) devices are particularly crucial not only for exploring quantum coherent phenomena in clean one-dimensional electronic systems, but also for developing carbon-based nanoelectronics or quantum devices. Here, we construct a double split-gate structure to explore the Aharonov-Bohm (AB) interference effect in individual single-wall CNT p - n junction devices. For the first time, we achieve the AB modulation of conductance with coaxial magnetic fields as low as 3 T, where the flux through the tube is much smaller than the flux quantum. We further demonstrate direct electric-field control of the nonmonotonic magnetoconductance through a gate-tunable built-in electric field, which can be quantitatively understood in combination with the AB phase effect and Landau-Zener tunneling in a CNT p - n junction. Moreover, the nonmonotonic magnetoconductance behavior can be strongly enhanced in the presence of Fabry-Pe ' rot resonances. Our Letter paves the way for exploring and manipulating quantum interference effects with combining magnetic and electric field controls.

引用

页数：6