Atomic Tunneling from a STM/AFM tip: Dissipative Quantum Effects from Phonons

Details Atomic Tunneling from a STM/AFM tip: Dissipative Quantum Effects from Phonons Atomic Tunneling from a STM/AFM tip: Dissipative Quantum Effects from Phonons

1994-06-08

arxiv.org/abs/cond-mat/9406043v2

Phys. Rev. Lett. 74, 1363 (1995)

Physics

Condensed Matter

12 pages, ReVTex3.0, two figures (postscript). This is a (substantially) revised version of cond-mat/9406043. More info (+ pos

Scientific paper

10.1103/PhysRevLett.74.1363

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 {\it ohmic} coupling from phonons for a two-state system. We propose an experiment in which an atom tunnels from the tip of an STM, and show how its behavior would be similar to the Macroscopic Quantum Coherence behavior predicted for SQUIDS. The ability to tune and calculate many parameters would lead to detailed tests of the standard theories. (For a general intro to this work on the on the World-Wide-Web: http://www.lassp.cornell.edu. Click on ``Entertaining Science Done Here'' and ``Quantum Tunneling of Atoms'')

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