Nonthermal origin of electromigration at gold nanojunctions in the ballistic regime

Umeno, A.; Hirakawa, K.
April 2009
Applied Physics Letters;4/20/2009, Vol. 94 Issue 16, p162103
Academic Journal
We have investigated the electromigration process at gold nanojunctions as small as several tens of atoms. Junction conductance showed successive drops by one conductance quantum, corresponding to one-by-one removal of gold atoms, only when the junction voltage exceeded certain critical values. The peak position in the histogram of the observed critical voltages agreed with the activation energies for surface diffusion of gold atoms. This fact indicates that the elementary process of electromigration in such small junctions is the self-diffusion of metal atoms driven by microscopic kinetic energy transfer from a single conduction electron to a single metal atom.


Related Articles

  • Thermal stability of Ir-Mn/Co-Fe-B/Al-O/Co-Fe-B tunnel junctions. Li, F. F.; Sharif, R.; Jiang, L. X.; Zhang, X. Q.; Han, X. F.; Wang, Y.; Zhang, Z. // Journal of Applied Physics;12/1/2005, Vol. 98 Issue 11, p113710 

    The thermal stability of magnetic tunnel junctions with structures of Ta(5)/Cu(30)/Ta(5)/Ni79Fe21(5)/Ir22Mn78(12)/Co62Fe20B18(4)/Al(0.8)-oxide/Co62Fe20B18(4)/Cu(30)/Ta(5) (thicknesses unit in nanometers) has been investigated. The tunnel magnetoresistance (TMR) shows a large increase up to 54.4%...

  • Investigation of the direct electromigration term for Al nanodots within the depletion zone of a pn junction. Jeong Young Parka, J.; Phaneuf, R. J. // Journal of Applied Physics;11/15/2003, Vol. 94 Issue 10, p6883 

    We have investigated the effect of the large field produced within the depletion region of a pn junction on the shapes and positions of aluminum nanodots. Dots of 10–60 nm diameter were fabricated by the application of voltage pulses between an Al-coated scanning tunneling microscopy tip...

  • Water diffusion in Mount Changbai peralkaline rhyolitic melt. Haoyue Wang; Zhengjiu Xu; Behrens, Harald; Youxue Zhang // Contributions to Mineralogy & Petrology;Oct2009, Vol. 158 Issue 4, p471 

    Diffusion couple experiments with wet half (up to 4.6 wt%) and dry half were carried out at 789–1,516 K and 0.47–1.42 GPa to investigate water diffusion in a peralkaline rhyolitic melt with major oxide concentrations matching Mount Changbai rhyolite. Combining data from this work...

  • Modeling of the “fish-hook” effect in a classifier. Dueck, J. G.; Min'kov, L. L.; Pikushchak, E. V. // Journal of Engineering Physics & Thermophysics;Jan2007, Vol. 80 Issue 1, p64 

    On the basis of the kinematic model of entrainment of small particles by large ones the abnormally nonmonotonic dependence of the separation curve on the particle size is explained. The influence of the particle density, the classifier length, the split-parameter, and the average size of...

  • Physically sorbed collectors in froth flotation and their activity. Part II. Kondrat’ev, S. // Journal of Mining Science;Mar2009, Vol. 45 Issue 2, p173 

    The mechanism of the physically sorbed collector in froth flotation is under discussion in the paper. It is shown that the basic characteristics of the collecting capacity of a physically sorbed flotation agent are its solubility, surface pressure in the film of the agent at...

  • Applicability of airlift draft-tube fluidized bioreactors for binary protein mixture bioseparation. Yaser Dahman; Argyrios Margaritis // Bioprocess & Biosystems Engineering;Jun2008, Vol. 31 Issue 4, p335 

    Abstract  An airlift draft-tube fluidized bioreactor has been designed and tested for applications in protein bioseparation. Operating parameters and geometrical dimensions of the bioreactor were optimized to ensure fluid circulation in a defined cyclic pattern between the riser and the...

  • Squeezing of a periodic emulsion through a cubic lattice of spheres. Zinchenko, Alexander Z.; Davis, Robert H. // Physics of Fluids;Apr2008, Vol. 20 Issue 4, p040803 

    Squeezing of a periodic, highly concentrated emulsion of deformable drops through a dense, simple cubic array of solid spherical particles at zero Reynolds number is simulated by considering one drop in a periodic cell. The particles are rigidly held in space. The drops with nondeformed diameter...

  • Diffusion of the Nearctic leafhopper Scaphoideus titanus Ball in Europe: a consequence of human trading activity. Sabrina Bertin; Carmela Guglielmino; Nisrine Karam; Ludvik Gomulski; Anna Malacrida; Giuliano Gasperi // Genetica;Nov2007, Vol. 131 Issue 3, p275 

    Abstract   Scaphoideus titanus Ball is a Nearctic leafhopper that was introduced for the first time in Europe probably at the beginning of the 20th century. In Europe, this species is a specialist on cultivated grapevines and is of great economic importance as the vector of...

  • Excitation dynamics in polymer-coated semiconductor quantum dots with integrated dye molecules: The role of reabsorption. Niebling, Tobias; Zhang, Feng; Ali, Zulqurnain; Parak, Wolfgang J.; Heimbrodt, Wolfram // Journal of Applied Physics;Nov2009, Vol. 106 Issue 10, p104701-1 

    Inorganic CdSe/ZnS core-shell quantum dots have been coated with amphiphilic polymers in order to enable their transfer to aqueous solutions. Additionally, ATTO-dye molecules have been embedded in the polymer shell. In this geometry ATTO dye acts as acceptor of the quantum dot donors'...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics