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  4. Evidence for a Peierls phase-transition in a three-dimensional multiple charge-density waves solid
 
research article

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

Mansart, Barbara  
•
Cottet, Mathieu J. G.
•
Penfold, Thomas J.
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2012
Proceedings Of The National Academy Of Sciences Of The United States Of America (PNAS)

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.

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Type
research article
DOI
10.1073/pnas.1117028109
Web of Science ID

WOS:000302533500018

Author(s)
Mansart, Barbara  
•
Cottet, Mathieu J. G.
•
Penfold, Thomas J.
•
Dugdale, Stephen B.
•
Tediosi, Riccardo
•
Chergui, Majed  
•
Carbone, Fabrizio  
Date Issued

2012

Publisher

National Academy of Sciences

Published in
Proceedings Of The National Academy Of Sciences Of The United States Of America (PNAS)
Volume

109

Start page

5603

End page

5608

Subjects

ultrafast broadband spectroscopy

•

electron-lattice interactions

•

optical spectral weight

•

Sum-Rule

•

Dynamics

•

Relaxation

•

Lu5Ir4Si10

•

Electrons

•

2H-Tase2

•

Lattice

•

Motion

•

Giant

•

Model

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LSU  
LUMES  
Available on Infoscience
May 4, 2012
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/80033
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