PerspectiveApplied Physics

Ultrasmall Wires Get Excited

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Science  01 Feb 2002:
Vol. 295, Issue 5556, pp. 810-811
DOI: 10.1126/science.1069031

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Modern tunneling spectroscopy methods are providing ever more detailed insights into the electronic behavior of nanoscale materials. In his Perspective, Zülicke highlights the report by Auslaender et al., whose experimental setup enables them to measure the tunneling current across the extended barrier between two parallel ultrasmall wires as a function of applied voltage and magnetic field. Their measurements reveal important changes of the excitation spectrum due to electron-electron interactions, as predicted for one-dimensional systems, providing hints of the expected fractionalization of electrons.