期刊
REVIEW OF SCIENTIFIC INSTRUMENTS
卷 82, 期 5, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3582068
关键词
-
资金
- FENA Focus Center
- Air Force Office of Scientific Research [FA955008-1-0427]
We have developed a highly sensitive integrated capacitance bridge for quantum capacitance measurements. Our bridge, based on a GaAs HEMT amplifier, delivers attofarad (aF) resolution using a small AC excitation at or below k(B)T over a broad temperature range (4-300 K). We have achieved a resolution at room temperature of 60 aF/root Hz for a 10 mV ac excitation at 17.5 kHz, with an improved resolution at cryogenic temperatures, for the same excitation amplitude. We demonstrate the utility of our bridge for measuring the quantum capacitance of nanostructures by measuring the capacitance of top-gated graphene devices and cleanly resolving the density of states. (C) 2011 American Institute of Physics. [doi:10.1063/1.3582068]
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据