A negative dielectric constant in nano-particle materials under an electric field at very low frequencies

C. W. Chu, F. Chen, J. Shulman, S. Tsui, Y. Y. Xue, W. Wen, P. Sheng

Research output: Contribution to journalConference articlepeer-review

21 Citations (Scopus)

Abstract

The significance of a negative dielectric constant has long been recognized. We report here the observation of a field-induced large negative dielectric constant of aggregates of oxide nano-particles at frequencies below ∼1 Hz at room temperature. The accompanying induced charge detected opposes the electric field applied in the field-induced negative dielectric constant state. A possible collective effect in the nano-particle aggregates is proposed to account for the observations. Materials with a negative dielectric constant are expected to provide an attraction between similar charges and unusual scattering to electromagnetic waves with possible profound implications for high temperature superconductivity and communications.

Original languageEnglish
Article number59320X
Pages (from-to)1-10
Number of pages10
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5932
DOIs
Publication statusPublished - 2005
EventStrongly Correlated Electron Materials: Physics and Nanoengineering - San Diego, CA, United States
Duration: 2005 Jul 312005 Aug 4

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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