Quantum conductance in electrodeposited nanocontacts and magnetoresistance measurements

Elhoussine, F; Encinas, Armando; Mátéfi‐Tempfli, Stefan; Piraux, Luc

doi:10.1063/1.1557341

Cited by 7 publications

(6 citation statements)

References 9 publications

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“…3A). An atomically thin Cu contact is formed [18][19][20][21][22][23][24][25][26][27][28]. The corresponding conductance is estimated as G 0 = 2e 2 0 /h, with e 0 being the elementary charge and h is Planck's constant.…”

Section: Electrochemical Characterizationmentioning

confidence: 99%

“…Different approaches have been developed to fabricate electrode pairs with molecular scale gaps and metal nanocontacts, such as two-step electron beam lithography [10,11], nanoporeand template-based methods [12,13], mechanical break junctions [14][15][16], electromigration [17] and electrodeposition or dissolution [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32]. Strategies based on electrochemical concepts involve local probe techniques [18,20] or supported electrodes on solid substrates, which enable tailoring the composition, shapes and dimensions of the respective nanostructures [18][19][20][21][22][23][24][25][26][27][28][29][30]32]. A variety of metal contacts have been produced including Au [19,25,27,29,31], Cu [18,20,…”

Section: Introductionmentioning

confidence: 99%

“…Strategies based on electrochemical concepts involve local probe techniques [18,20] or supported electrodes on solid substrates, which enable tailoring the composition, shapes and dimensions of the respective nanostructures [18][19][20][21][22][23][24][25][26][27][28][29][30]32]. A variety of metal contacts have been produced including Au [19,25,27,29,31], Cu [18,20,23,24], Ag [21,24,30], Ni [24,28], Pt [22] and Co [26]. Electrochemically fabricated nanocontacts possess unique electrical, mechanical, magnetic and (electro-) chemical properties at room temperature that are different from their bulk samples [33,34].…”

Section: Introductionmentioning

confidence: 99%

“…Electrochemically fabricated nanocontacts possess unique electrical, mechanical, magnetic and (electro-) chemical properties at room temperature that are different from their bulk samples [33,34]. Examples are conductance quantization and conductance changes due to adsorption, high mechanical stability and ballistic magneto resistance behavior [18][19][20]28].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Electrochemical fabrication and characterization of nanocontacts and nm-sized gaps

Mészáros

Kronholz²,

Karthäuser³

et al. 2007

Appl. Phys. A

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Copper nanocontacts and molecular-sized nanogaps were prepared and characterized at electrified solid/liquid interfaces employing lithographic and electrochemical techniques. A dedicated four-electrode potentiostat was developed for controlling the electrochemical fabrication process and for monitoring the electrical characteristics of the nanostructures created. The formation and breaking of Cu nanocontacts exhibits conductance quantization characteristics. The statistical analysis of conductance histograms revealed a preferential stability of nanocontacts with integer values of G 0 , with a clear preference for 1 G 0 , 2 G 0 and 3 G 0 . The growth of molecular-sized gaps shows quantized tunneling current, which is attributed to the discrete nature of Cu atoms, water molecules, and specifically adsorbed ions.

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Section: Electrochemical Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Electrochemical fabrication and characterization of nanocontacts and nm-sized gaps

Mészáros

Kronholz²,

Karthäuser³

et al. 2007

Appl. Phys. A

View full text Add to dashboard Cite

show abstract

“…For this reason, electronic transport in atomic sized magnetic nanowires has been profusely studied 5,6,12,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52 However, the analysis of conductance histograms H(G) becomes even more intricate in magnetic nanowires due to the presence of this new degree of freedom as well as the presence of new scattering sources as magnetization domain walls.…”

Section: Introductionmentioning

confidence: 99%

Statistical analysis of Ni nanowires breaking processes: a numerical simulation study

García-Mochales,

Paredes,

Peláez

et al. 2007

Preprint

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We have performed the statistical analysis of the breaking behavior of Ni nanowires. Using molecular dynamic simulations based on the embedded atom method approximation, we have simulated thousands of nanocontact breakages, determining the time evolution of both the nanowire atomic structure and the nanowire minimum cross section time evolution, Sm(t). The accumulation of thousands of breaking events allows the construction of Sm histograms. These histograms allow the analysis of the influence of the temperature, the crystalline stretching direction and the initial nanowire size on the breaking processes. We have also calculated the proportion of monomers, dimers and more complex structures at the latest stages of the breaking process. We have found important differences among results obtained for different nanowire orientations and sizes, illustrating that very small wires do not capture the behavior of actual thick nanonecks obtained in experiments. Three main cases have been observed: (a) For the [111] stretching direction and large nanowire sizes, the wire gradually evolves from more complex structures to monomers and, in several cases, to dimers prior its rupture. This case presents well ordered structures during the breaking process. (b) On the other hand, for large nanowires stretched along the [100] and [110] directions the system mainly breaks directly from complex structures, with a low probability of finding monomers and dimers. In this case a clear dependence on temperature is observed. At room temperature a huge histogram peak around Sm = 5 appears, showing for first time in the literature the presence of long staggered pentagonal Ni wires with ...1-5-1-5-1-5-.... structure. Additionally, we have found for this case that nanowires have disordered regions during their breakage. (c) When the initial wire size is small strong size effects are observed independent on the temperature and stretching direction used. Finally, we have found that the local structure around monomers and dimmers do not depend on the stretching direction and that these configurations differ from those usually chosen in static studies of conductance.

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Crystallographically-oriented single-crystalline copper nanowire arrays electrochemically grown into nanoporous anodic alumina templates

et al. 2005

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Quantum conductance in electrodeposited nanocontacts and magnetoresistance measurements

Cited by 7 publications

References 9 publications

Electrochemical fabrication and characterization of nanocontacts and nm-sized gaps

Electrochemical fabrication and characterization of nanocontacts and nm-sized gaps

Statistical analysis of Ni nanowires breaking processes: a numerical simulation study

Crystallographically-oriented single-crystalline copper nanowire arrays electrochemically grown into nanoporous anodic alumina templates

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