Scanning frequency mixing microscopy of high-frequency transport behavior at electroactive interfaces

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Title: Scanning frequency mixing microscopy of high-frequency transport behavior at electroactive interfaces
Authors: Rodriguez, Brian J.
Jesse, S.
Meunier, Vincent
Kalinin, S. V.
Permanent link: http://hdl.handle.net/10197/5339
Date: Apr-2006
Abstract: An approach for high-frequency transport imaging, referred to as scanning frequency mixing microscopy (SFMM), is developed. Application of two high-frequency bias signals across an electroactive interface results in a low-frequency component due to interface nonlinearity. The frequency of a mixed signal is chosen within the bandwidth of the optical detector and can be tuned to the cantilever resonances. The SFMM signal is comprised of an intrinsic device contribution and a capacitive mixing contribution, and an approach to distinguish the two is suggested. This technique is illustrated on a model metal-semiconductor interface. The imaging mechanism and surface-tip contrast transfer are discussed. SFMM allows scanning probe microscopy based transport measurements to be extended to higher, ultimately gigahertz, frequency regimes, providing information on voltage derivatives of interface resistance and capacitance, from which device characteristics such as Schottky barrier height, etc., can be estimated. (c) 2006 American Institute of Physics.
Type of material: Journal Article
Publisher: American Institute of Physics
Copyright (published version): 2006 American Institute of Physics
Keywords: Scanning microscopy;Micromixing;Signal generators;Electrical resistivity;Frequency analyzers;Schottky barriers;Electric measurements;Height measurements
DOI: 10.1063/1.2192977
Language: en
Status of Item: Peer reviewed
Appears in Collections:Physics Research Collection

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