PROBE CAPACITANCE-DEPENDENT SYSTEMATIC ERROR IN I-V MEASUREMENTS OF NANOWIRES: ANALYSIS AND CORRECTION<br />
Journal Title: Metrology and Measurement Systems - Year 2007, Vol 14, Issue 3
Abstract
We propose a method of eliminating the systematic error due to the capacitance of digital oscilloscope probes in the experimental setup used for tracing current-voltage (I-V) curves of nanowires with quantum point contact (QPC). Used in I-V measurements, a digital storage oscilloscope (DSO) allows a reduction of measurement time to microseconds. Such short measurement time, however, involves a sensible effect of transition states occurring in an experimental setup representing an RC circuit. We analyze the effect of probe capacitance on the signal reading and on the resulting I-V curves, and derive theoretical formulae for the probe capacitance-dependent systematic error on the basis of a model proposed for the discussed measurement method. The systematic error is evidenced by nonlinearity of the obtained current-voltage curve, its shift with respect to the origin of the coordinate system, and an extension of the measurement range. We propose a correction method based on the derived theoretical relations that allow to calculate the corrections to be applied. The presented results of I-V measurements of nanowires with QPC confirm the correctness of our model and the efiectiveness of the method proposed.
Authors and Affiliations
MACIEJ WAWRZYNIAK
Keywords
Related Articles
- EP ID EP129055
- DOI -
- Views 49
- Downloads 0
USING NEURAL NETWORKS FOR ERROR SUPPRESSION IN NONLINEAR SYSTEMS WITH HYSTERESIS
Some shortcomings of nonlinear systems with hysteresis are relatively big errors, e.g. linearity error, hysteresis error, etc. The paper deals with possible improvements in the methods of error suppression by using neura...
COMPARISON OF LS-TYPE METHODS FOR DETERMINATION OF OLIVE OIL MIXTURES ON THE BASIS OF NIR SPECTRAL DATA
The spectrophotometric analysis of oil mixtures, containing olive oil, is the subject of this paper. Its objective is to compare six least-squares-type estimators which are potentially applicable for determination of a...
FACTORS LIMITING EXTREMELY SENSITIVE MEASURING RANGES OF CONTEMPORARY PICOAMMETERS<br />
In the paper the principle of operation of contemporary picoammeters with analog conversion of current into voltage has been presented. The influence of factors disturbing the i/u conversion in a passive as well as in an...
ANALOG-TO-DIGITAL CONVERTER DIFFERENTIAL NONLINEARITY ERROR CORRECTION IN BUILDING CONDUCTANCE HISTOGRAMS
In nanowire electrical conductance quantization studies, conductance histograms are built from a large number of conductance curves of conductance stepwise variations in time. The conductance curves are obtained by means...
FOUR-PARAMETER SINE-FITTING ALGORITHM FOR DETECTION AND CLASSIFICATION OF TRANSIENTS AND WAVEFORM DISTORTIONS
This paper describes a new method for detection of some power quality (PQ) disturbances, namely transients and waveform distortions. The proposed algorithm is based on a modified version of the four-parameter sine-fitti...