Scanning Tunneling Microscopy of a Luttinger Liquid

Abstract

Explicit predictions for Scanning Tunneling Microscopy (STM) on interacting one-dimensional electron systems are made using the Luttinger liquid formalism. The STM current changes with distance from an impurity or boundary in a characteristic way, which reveals the spin-charge separation and the interaction strength in the system. The current exhibits Friedel-like oscillations, but also carries additional modulated behavior as a function of voltage and distance, which shows the spin-charge separation in real space. Moreover, very close to the boundary the current is strongly reduced, which is an indication of the interaction strength in the system.

Final published version. 4 pages in revtex format including 2 epsfig-embedded figures. The latest version in PDF format is available from http://fy.chalmers.se/~eggert/papers/stm.pdf

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