Dielectric constant of glasses: first observation of a two-dimensional behavior

F. Ladieu; J. Le Cochec; P. Pari; P. Trouslard; P. Ailloud

doi:10.1103/PhysRevLett.90.205501

Dielectric constant of glasses: first observation of a two-dimensional behavior

Condensed Matter 2009-11-07 v1

Authors: F. Ladieu , J. Le Cochec , P. Pari , P. Trouslard , P. Ailloud

View on arXiv ↗ PDF ↗ DOI ↗

Abstract

The 1kHz real part $\chi'$ of the dielectric constant of a structural glass was measured at low temperature $T$ down to 14 mK. Reducing the sample thickness $h$ to 10 nm suppresses the usual minimum of $\chi'$ for measuring fields $E<.5$ MV/m. This contradicts the Two Level System (TLS) model but is well accounted for by including TLS-TLS interactions where excitations delocalize between TLS's through a $E$ -induced mechanism recently designed: for small $h$ 's this interaction is reduced, which explains the two-dimensional behavior of $\chi'(T)$ . Hence, interactions play a key role in standard thick samples.

Keywords

dielectric constant structural glass Two Level System TLS-TLS interactions two-dimensional behavior low temperature

Cite

@article{arxiv.cond-mat/0210024,
  title  = {Dielectric constant of glasses: first observation of a two-dimensional behavior},
  author = {F. Ladieu and J. Le Cochec and P. Pari and P. Trouslard and P. Ailloud},
  journal= {arXiv preprint arXiv:cond-mat/0210024},
  year   = {2009}
}

Comments

latex finesse3.tex, 5 files, 4 figures, 4 pages [SPEC-S02/050], submitted to Phys. Rev. Lett

Dielectric constant of glasses: first observation of a two-dimensional behavior

Abstract

Keywords

Cite

Comments

Related papers