G01Q60/04

A METHOD OF EXAMINING A SAMPLE IN A SCANNING TUNNELING MICROSCOPE USING TIP-TO-TIP SAMPLE DISTANCE VARIATIONS

A method of examining a sample (1) in a microscope equipped with at least one scanning tunneling tip (4), wherein tunneling current TC can be detected and wherein relative tip-to-sample planar coordinates xrel=xtip?xsample and yrel=ytip?ysample are differences between corresponding tip and sample coordinates, wherein the following steps are performed above at least two surface points of the sample (1): placing the tip (4) successively above said surface points of the sample (1); above each of said surface points of the sample, performing a distance varying step (33) comprising varying the tip-to-sample distance D, and performing a time dependencies recording step (35), comprising recording time dependencies TC(t), xrel(t), yrel(t), D(t). Based on these time dependencies, four maps can be created from a single measurement: constant current map, constant height map, Local Density of States Topography map and potential barrier map.

A METHOD OF EXAMINING A SAMPLE IN A SCANNING TUNNELING MICROSCOPE USING TIP-TO-TIP SAMPLE DISTANCE VARIATIONS

A method of examining a sample (1) in a microscope equipped with at least one scanning tunneling tip (4), wherein tunneling current TC can be detected and wherein relative tip-to-sample planar coordinates xrel=xtip?xsample and yrel=ytip?ysample are differences between corresponding tip and sample coordinates, wherein the following steps are performed above at least two surface points of the sample (1): placing the tip (4) successively above said surface points of the sample (1); above each of said surface points of the sample, performing a distance varying step (33) comprising varying the tip-to-sample distance D, and performing a time dependencies recording step (35), comprising recording time dependencies TC(t), xrel(t), yrel(t), D(t). Based on these time dependencies, four maps can be created from a single measurement: constant current map, constant height map, Local Density of States Topography map and potential barrier map.

Method of examining a sample in a scanning tunneling microscope using tip-to-sample distance variations

A method of examining a sample (1) in a microscope equipped with at least one scanning tunneling tip (4), wherein tunneling current TC can be detected and wherein relative tip-to-sample planar coordinates xrel=xtipxsample and yrel=ytipysample are differences between corresponding tip and sample coordinates, wherein the following steps are performed above at least two surface points of the sample (1): placing the tip (4) successively above said surface points of the sample (1); above each of said surface points of the sample, performing a distance varying step (33) comprising varying the tip-to-sample distance D, and performing a time dependencies recording step (35), comprising recording time dependencies TC(t), xrel(t), yrel(t), D(t). Based on these time dependencies, four maps can be created from a single measurement: constant current map, constant height map, Local Density of States Topography map and potential barrier map.

Method of examining a sample in a scanning tunneling microscope using tip-to-sample distance variations

A method of examining a sample (1) in a microscope equipped with at least one scanning tunneling tip (4), wherein tunneling current TC can be detected and wherein relative tip-to-sample planar coordinates xrel=xtipxsample and yrel=ytipysample are differences between corresponding tip and sample coordinates, wherein the following steps are performed above at least two surface points of the sample (1): placing the tip (4) successively above said surface points of the sample (1); above each of said surface points of the sample, performing a distance varying step (33) comprising varying the tip-to-sample distance D, and performing a time dependencies recording step (35), comprising recording time dependencies TC(t), xrel(t), yrel(t), D(t). Based on these time dependencies, four maps can be created from a single measurement: constant current map, constant height map, Local Density of States Topography map and potential barrier map.