Magnetic field evolution of spin blockade in Ge/Si nanowire double quantum dots

被引：39

作者：

Zarassi, A. ^{[1
]}

Su, Z. ^{[1
]}

Danon, J. ^{[2
]}

Schwenderling, J. ^{[1
,3
]}

Hocevar, M. ^{[4
]}

Nguyen, B. M. ^{[5
]}

Yoo, J. ^{[5
]}

Dayeh, S. A. ^{[6
,7
,8
]}

Frolov, S. M. ^{[1
]}

机构：

[1] Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA

[2] Norwegian Univ Sci & Technol, NTNU, Dept Phys, N-7491 Trondheim, Norway

[3] Rhein Westfal TH Aachen, D-52062 Aachen, Germany

[4] CNRS, Inst Neel, F-38000 Grenoble, France

[5] Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Los Alamos, NM 87545 USA

[6] Univ Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92037 USA

[7] Univ Calif San Diego, Grad Program Mat Sci & Engn, La Jolla, CA 92037 USA

[8] Univ Calif San Diego, Dept NanoEngn, La Jolla, CA 92037 USA

来源：

PHYSICAL REVIEW B | 2017年 / 95卷 / 15期

基金：

美国国家科学基金会;

关键词：

SEMICONDUCTOR NANOWIRE;

D O I：

10.1103/PhysRevB.95.155416

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We perform transport measurements on double quantum dots defined in Ge/Si core/shell nanowires and focus on Pauli spin blockade in the regime where tens of holes occupy each dot. We identify spin blockade through the magnetic field dependence of the leakage current. We find both a dip and a peak in the leakage current at zero field. We analyze this behavior in terms of quantum dot parameters such as coupling to the leads, interdot tunnel coupling, as well as spin-orbit interaction. We estimate a lower bound on the spin-orbit parameter corresponding to an upper bound of l(so) = 500 nm for the Rashba spin-orbit length. We also extract effective Lande g factors up to 8.0 from field-dependent spin blockade measurements.

引用

页数：7

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