Evidence for a Peierls phase-transition in a three-dimensional multiple charge-density waves solid

B Mansart, M.J.G Cottet, T.J Penfold, S.B Dugdale, R Tediosi, M Chergui, F Carbone

Research output: Contribution to journalArticle (Academic Journal)peer-review

29 Citations (Scopus)

Abstract

The effect of dimensionality on materials properties has become strikingly evident with the recent discovery of graphene. Charge ordering phenomena can be induced in one dimension by periodic distortions of a material’s crystal structure, termed Peierls ordering transition. Charge-density waves can also be induced in solids by strong coulomb repulsion between carriers, and at the extreme limit, Wigner predicted that crystallization itself can be induced in an electrons gas in free space close to the absolute zero of temperature. Similar phenomena are observed also in higher dimensions, but the microscopic description of the corresponding phase transition is often controversial, and remains an open field of research for fundamental physics. Here, we photoinduce the melting of the charge ordering in a complex three-dimensional solid and monitor the consequent charge redistribution by probing the optical response over a broad spectral range with ultrashort laser pulses. Although the photoinduced electronic temperature far exceeds the critical value, the charge-density wave is preserved until the lattice is sufficiently distorted to induce the phase transition. Combining this result with ab initio electronic structure calculations, we identified the Peierls origin of multiple charge-density waves in a three-dimensional system for the first time.
Translated title of the contributionEvidence for a Peierls phase-transition in a three-dimensional multiple charge-density waves solid
Original languageEnglish
Pages (from-to)5603 - 5608
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume109
Issue number15
DOIs
Publication statusPublished - Apr 2012

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