Coulomb oscillations of a quantum antidot formed by an airbridged pillar gate in the integer and fractional quantum Hall regime

被引：0

作者：

Hata, Tokuro ^{[1
]}

Mitani, Hiroki ^{[1
]}

Uchiyama, Hidetaka ^{[1
]}

Akiho, Takafumi ^{[2
]}

Muraki, Koji ^{[2
]}

Fujisawa, Toshimasa ^{[1
]}

机构：

[1] Inst Sci Tokyo, Dept Phys, 2-12-1 Ookayama,Meguro Ku, Tokyo 1528551, Japan

[2] NTT Basic Res Labs, Atsugi, Kanagawa 2430198, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2024年 / 63卷 / 12期

基金：

日本学术振兴会;

关键词：

mesoscopic physics; quantum Hall effect; fractional quantum Hall effect; quantum antidot;

D O I：

10.35848/1347-4065/ad90eb

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Quantum antidots (QAD) are attractive for manipulating quasiparticles in quantum Hall (QH) systems. Here, we form a QAD in the integer and fractional QH regimes at nominal Landau-level filling factor nu = 2, 1, and 2/3 using a submicron pillar gate with an airbridge connection. After confirming the required conditions for a fully depleted QAD, we analyze the observed Coulomb oscillations in terms of the area of the QAD and the effective charge for the oscillation period in an identical gate voltage range. The area at nu = 2/3 is significantly smaller than that at nu = 2 and 1, in qualitative agreement with the previous report. By assuming a constant gate capacitance, the effective charge at nu = 2/3 is about 2/3 of that at nu = 2 and 1. The QAD device can be used to capture and emit charges in the unit of 2e/3.

引用

页数：4

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