  A spectroscopic imaging-scanning tunneling microscope (SI-STM) allows the
atomic scale visualization of surface electronic and magnetic structure of
novel quantum materials with high energy resolution. To achieve the optimal
performance, low vibration facility is required. Here, we describe the design
and the performance of an ultrahigh vacuum STM system supported by a hybrid
vibration isolation system that consists of a pneumatic passive and a
piezoelectric active vibration isolation stages. The STM system is equipped
with a 1K pot cryogenic insert and a 9 Tesla superconducting magnet, capable of
continuous SI-STM measurements for 7 days. A field ion microscopy system is
installed for in situ STM tip treatment. We present the detailed vibrational
noise analysis of the hybrid vibration isolation system and demonstrate the
performance of our STM system by taking high resolution spectroscopic maps and
topographic images on several quantum materials. Our results establish a new
strategy to achieve an effective vibration isolation system for high-resolution
STM and other scanning probe microscopy to investigate the nanoscale quantum
phenomena.
