Critical slowing down of the charge carrier dynamics at the mott metal-insulator transition

Benedikt Hartmann, David Zielke, Jana Polzin, Takahiko Sasaki, Jens Müller

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

We report on the dramatic slowing down of the charge carrier dynamics in a quasi-two-dimensional organic conductor, which can be reversibly tuned through the Mott metal-insulator transition (MIT). At the finite-temperature critical end point, we observe a divergent increase of the resistance fluctuations accompanied by a drastic shift of spectral weight to low frequencies, demonstrating the critical slowing down of the order parameter (doublon density) fluctuations. The slow dynamics is accompanied by non-Gaussian fluctuations, indicative of correlated charge carrier dynamics. A possible explanation is a glassy freezing of the electronic system as a precursor of the Mott MIT.

Original languageEnglish
Article number216403
JournalPhysical review letters
Volume114
Issue number21
DOIs
Publication statusPublished - 2015 May 29

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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