Floating electrometer for scanning tunneling microscope applications in the femtoampere range

被引：16

作者：

Heer, R ^{[1
]}

Eder, C ^{[1
]}

Smoliner, J ^{[1
]}

Gornik, E ^{[1
]}

机构：

[1] Vienna Tech Univ, Inst Festkorperelekt & Mikrostrukt Zentrum, A-1040 Vienna, Austria

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 1997年 / 68卷 / 12期

关键词：

D O I：

10.1063/1.1148418

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

In this work, a floating, high precision current-voltage converter, applicable to scanning tunneling microscopy (STM) and ballistic electron emission microscopy (BEEM) measurements, is described. The electrometer circuit presented shows a bias independent output offset, adds low noise. and has low thermal drift. The amplifier is useful for any floating applications where an ultrasmall current has to be measured with high resolution (+/-20 fA). The circuit is fast enough for typical sampling rates required for BEEM or STM image measurements and can also be used for fA measurements related to ground. (C) 1997 American Institute of Physics.

引用

页码：4488 / 4491

页数：4

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