Nanowires and Nanoribbons of Charge-Density-Wave Conductor NbSe_3

摘要

We report synthesis of nanowires and nanoribbons of the charge-density-wave conductor NbSe_3 through direct reaction of Nb and Se powders.The transverse dimension of the obtained nanostructures,as identified with scanning/transmission electron microscopy,ranges from 20 to 700 nm.X-ray and selected area electron diffraction analyses indicate that these nanowires and nanoribbons are single crystalline.Four-probe resistivity measurements confirm the expected charge-density-wave transitions,and furthermore,we find significant enhancement in the depinning threshold fields,which we attribute to a confinement effect.