| Autor: |
Bid, Aveek, Raychaudhuri, Arup K |
| Přispěvatelé: |
Popovic, Dragana, Weissman, Michael B, Racz, Zoltan A |
| Rok vydání: |
2004 |
| Předmět: |
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| Zdroj: |
IndraStra Global. |
| ISSN: |
2381-3652 |
| Popis: |
We have studied the conductance fluctuations in silver nanowires in the temperature range 4K to 375K. The nanowires with an average diameter of 15nm were electrochemically deposited using polycarbonate membrane as template. Principal motivation is to study low frequency defect relaxations in the nanowires that give rise to conductance fluctuations with a spectral power $S(f) \sim 1/f^{alpha}$ . The Ag nanowires, stabilized at 400K with a current of few mA, show metallic temperature dependence. The S(f) was measured with a psuedo 4 probe ac technique with rms current of few tens of µA. We find that $S_V(f)$ (which is $\sim 1/f^{alpha}$) shows a rapid rise at around 220K as T is increased along with an enhancement in the exponent alpha. The exponent alpaha $\approx 1-1.1$ for T |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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