Variable Temperature, Ultra-High Vacuum STM

Device Specifications

Omicron ultra-high vacuum variable temperature STM Setup

STM Chamber

Temperature Range: 30 - 500 K
Z resolution: 0.005 nm
Gap Voltage: +/- 5 mV to 10 V
Tunneling Current: <1 pA to 300 nA
Pressure: down to 1x10-11 mbar
X, Y course range: 10mm x 10mm

Prep Chamber

Argon Cation Sputtering Gun
Electron Bombardment Sample Heater
Quadrupole Mass Spectrometer
PSP XPS with 5 channel detector

Omicron ultra-high vacuum variable temperature scanning tunneling microscopy setup

Capabilities

Gold(111) reconstruction taken at 100 pA and a tip bias of 0.3 V

Figure 1: Au(111) 22 x √3 reconstruction taken at 100 pA and a tip bias of 0.3 V. Image area is 100 nm x 91 nm and was taken at room temp.

Gold(111) with a couple soliton walls visible

Figure 2: Au(111) with a couple soliton walls visible. Taken at 200 pA with a tip bias of -0.3V at room temp. Image size is 10 nm x 10 nm

Sulfur arranged in c-2 x 2 formation on a curved Nickel(100) crystal

Figure 3: Sulfur arranged in c(2 x 2) formation on a curved Ni(100) crystal. Taken at room temp with 10 pA and 0.5 V tip bias conditions. Image size is 15 nm x 15 nm.

Figure 4: Ni(100)-(2 x 2)p4gC "Clock" Reconstruction. Taken at room temp with 100 pA and 0.2 V tip bias. Image size is 13 nm x 13 nm.