Journal
PHYSICAL REVIEW LETTERS
Volume 84, Issue 19, Pages 4413-4416Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.84.4413
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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 the 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.
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