STM/STS Laboratory

The STM/STS instrumentation has the following characteristics:

Atomic resolution. Low tunnelling currents (up to 500 fA).

Working modes: Imaging at constant tunnel current, Imaging at constant Height, I-V spectroscopy.

X-Y piezoceramic tube:

• High voltage mode scan size: 10 x 10 µm
• Low voltage mode scan size: 650 x 650 µm
• High voltage mode resolution: 1.5 Å
• Low voltage mode resolution: 0.1 Å

Z piezoceramic tube:

• High voltage mode scan size: 1.2 µm
• High voltage mode resolution: 0.2 µm

Translator stage:

• X-Y range: 5 x 5 mm
• Z range: 13 mm (4 mm servo assisted)

STM Head and tip holder

• Head housing low current preamplifier with 10⁹ V/A gain
• Images from 2pA to 2nA

Responsible: Vittorio Bellani