Role of the chemical bonding for the time-dependent electron transport through an interacting quantum dot

GÖKER A. İ., Zhu Z., Manchon A., Schwingenschlögl U.

Chemical Physics Letters, cilt.509, sa.1-3, ss.48-50, 2011 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 509 Sayı: 1-3
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1016/j.cplett.2011.04.086
  • Dergi Adı: Chemical Physics Letters
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.48-50
  • Bilecik Şeyh Edebali Üniversitesi Adresli: Evet

Özet

A combination of ab initio and many-body calculations is utilized to determine the effects of the bonding in Au electrodes on the time dependent current through a quantum dot suddenly shifted into the Kondo regime by a gate voltage. For an asymmetrically coupled system the instantaneous conductance exhibits fluctuations. The frequencies of the fluctuations turn out to be proportional to the energetic separation between the dominating peaks in the density of states and the Fermi level. The chemical bonding in the electrodes, thus, drastically alters the transient current, which can be accessed by ultrafast pump-probe techniques. © 2011 Elsevier B.V. All rights reserved.