Effect of scattering on zero-bias anomaly and conductance reduction in quasi-one-dimensional quantum wires

K. M. Liu, V. Umansky, Shih-ying Hsu

Research output: Contribution to journalArticle

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Abstract

We present a systematic study on the zero-bias conductance peak and its dependences on the carrier density and structural geometry in quasi-one-dimensional quantum wires (QWs). This zero-bias anomaly (ZBA) is suppressed by either decreasing the carrier density or increasing the QW length. The differential conductance at zero bias decreases with increasing temperature in accordance with a thermal-activation model up to a well-defined cut-off temperature. We demonstrate that the activation energy, cut-off temperature, and width of the ZBA are correlated, and suggest that these features are controlled by electron scattering in QWs.

Original languageEnglish
Article number235316
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume81
Issue number23
DOIs
StatePublished - 11 Jun 2010

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