Correlations of the mutual positions of the nodes of charge density waves in side-by-side placed InAs wires measured with scanning gate microscopy

Abstract

We investigate the correlations of the mutual positions of the nodes of charge density waves in side-by-side placed InAs nanowires in presence of a conductive atomic force microscope tip served as a mobile gate at helium temperatures. Scanning gate microscopy scans demonstrate mutual correlation of positions of charge density waves nodes of two wires. A general mutual shift of the nodes positions and “crystal lattice mismatch” defect were observed. These observations demonstrate the crucial role of Coulomb interaction in formation of charge density waves in InAs nanowires.