Instrumentation and sample preparation. The whole procedure from the sample preparation through the transport measurement was performed in a home-built UHV apparatus without breaking vacuum (a). Typical STM images of a ()-In sample before (b) (Vsample = −0.015 V) and after (c) (Vsample=2.0 V) are displayed. (d) The design of sample patterning in the black area shows the Ar +-sputtered region. The color indicates the degree of calculated current density (green, high; purple, low). (e) Optical microscope image of a patterned sample.
Uchihashi et al. Nanoscale Research Letters 2013 8:167 doi:10.1186/1556-276X-8-167