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Title: Non-Kondo zero-bias anomaly in disordered quantum wires

We investigated the behavior of the zero-bias anomaly in quantum wires that were embedded with impurities. The linear conductance G can exhibit cusp features that evolve with the positions of the impurities, and these features can be continuously changed using a combination of spit-gate and top-gate voltages. ZBA is observed regardless of the presence of impurity. Kondo model is inadequate for describing the behaviors of both G and ZBA. Despite the presence of impurity scattering, various ZBA behaviors that resemble those reported in clean quantum wires can be observed. Our results suggest that ZBA is an intrinsic phenomenon in a quantum wire, and its temperature and magnetic field dependence does not pertain to the Kondo correlations in quantum dot.
Authors:
;  [1] ;  [1] ;  [2]
  1. Department of the Physics, National Tsing Hua University, Hsinchu 30013, Taiwan (China)
  2. (China)
Publication Date:
OSTI Identifier:
22278064
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 6; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; CORRELATIONS; ELECTRIC CONDUCTIVITY; ELECTRIC POTENTIAL; IMPURITIES; KONDO EFFECT; MAGNETIC FIELDS; QUANTUM DOTS; QUANTUM WIRES; SCATTERING