Construction of Independently Driven Double-Tip Scanning Tunneling Microscope

Variable-temperature independently driven four-tip scanning tunneling microscope.

The authors have developed an ultrahigh vacuum (UHV) variable-temperature four-tip scanning tunneling microscope (STM), operating from room temperature down to 7 K, combined with a scanning electron microscope (SEM). Four STM tips are mechanically and electrically independent and capable of positioning in arbitrary configurations in nanometer precision. An integrated controller system for both ...

Design and Construction of a Scanning Tunneling Microscope

This report describes the design and construction of a Scanning Tunneling Microscope (STM). A Scanning Tunneling Microscope is a relatively new instrument in the field of surface science and has the capability of atomic resolution of surfaces. This report presents some background theory pertinent to the understanding of the STM. Theories of electron tunnefing, STM operation, and control theory ...

Construction of a Low Temperature Scanning Tunneling Microscope

JacobTosado July 22, 2004 This paper discusses work I have done with the construction of a low temperature scanning tunneling microscope (LTSTM) and the operation of a scanning tunneling microscope (STM). A brief description to why a LTSTM is used and the background concerning that description, is covered. Mainly methods in STM imaging are described giving insight into two possible sources of i...

Simulating Scanning Tunneling Microscope

Atomic tunneling from a scanning-tunneling or atomic-force microscope tip: dissipative quantum effects from phonons.

We study the effects of phonons on the tunneling of an atom between two surfaces. In contrast to an atom tunneling in the bulk, the phonons couple very strongly and qualitatively change the tunneling behavior. This is the first example of Ohmic coupling from phonons for a two-state system. We propose an experiment in which an atom tunnels from the tip of an scanning-tunneling microscope, and sh...