Abstract
Although the Gor’kov-Eliashberg effect in isolated ultrafine metal particles is forbidden due to the depolarization field inside it, a giant dielectric response is observed in an assembly of ultrafine metal particles connected to each other forming an interrupted metal strand. The metal strand, which has a very low depolarization field, is obtained by the application of electric field to the assembly of isolated minute metal particles. The strong electrostatic force due to high electric field in the nano air gap between the particles causes the particles to deform in the direction of the electric field and finally attains the percolating configuration with the formation of a metal filament, the electronic wave functions of which are localized due to lattice defects at the interface between the particles.
- Received 31 May 2003
DOI:https://doi.org/10.1103/PhysRevB.69.125416
©2004 American Physical Society