Publication detail
Photoinduced Enhancement of the Charge Density Wave Amplitude
SINGER, A. PATEL, S. KUKREJA, R. UHLÍŘ, V. WINGERT, J. FESTERSEN, S. ZHU, D. GLOWNIA, J. LEMKE, H. NELSON, S. KOZINA, M. ROSSNAGEL, K. BAUER, M. MURPHY, B. MAGNUSSEN, O. FULLERTON, E. SHPYRKO, O.
Czech title
Zesílení amplitudy vln nábojové hustoty indukované světlem
English title
Photoinduced Enhancement of the Charge Density Wave Amplitude
Type
journal article in Web of Science
Language
en
Original abstract
Symmetry breaking and the emergence of order is one of the most fascinating phenomena in condensed matter physics. It leads to a plethora of intriguing ground states found in antiferromagnets, Mott insulators, superconductors, and density-wave systems. Exploiting states of matter far from equilibrium can provide even more striking routes to symmetry-lowered, ordered states. Here, we demonstrate for the case of elemental chromium that moderate ultrafast photoexcitation can transiently enhance the charge-density-wave (CDW) amplitude by up to 30% above its equilibrium value, while strong excitations lead to an oscillating, large-amplitude CDW state that persists above the equilibrium transition temperature. Both effects result from dynamic electron-phonon interactions, providing an efficient mechanism to selectively transform a broad excitation of the electronic order into a well-defined, long-lived coherent lattice vibration. This mechanism may be exploited to transiently enhance order parameters in other systems with coupled degrees of freedom.
Czech abstract
Článek se zabývá přechodným zesílením aplitudy vln nábojové hustoty až o 30% za pomoci ultrarychlé fotoexcitace.
English abstract
Symmetry breaking and the emergence of order is one of the most fascinating phenomena in condensed matter physics. It leads to a plethora of intriguing ground states found in antiferromagnets, Mott insulators, superconductors, and density-wave systems. Exploiting states of matter far from equilibrium can provide even more striking routes to symmetry-lowered, ordered states. Here, we demonstrate for the case of elemental chromium that moderate ultrafast photoexcitation can transiently enhance the charge-density-wave (CDW) amplitude by up to 30% above its equilibrium value, while strong excitations lead to an oscillating, large-amplitude CDW state that persists above the equilibrium transition temperature. Both effects result from dynamic electron-phonon interactions, providing an efficient mechanism to selectively transform a broad excitation of the electronic order into a well-defined, long-lived coherent lattice vibration. This mechanism may be exploited to transiently enhance order parameters in other systems with coupled degrees of freedom.
Keywords in Czech
Chrom; Supravodivost; Vlny nábojové hustoty; Manganáty
Keywords in English
Chromium; Superconductivity; Charge Density Waves; Manganites
Released
20.03.2016
ISSN
1079-7114
Volume
117
Number
5
Pages from–to
056401-1–056401-6
Pages count
6
BIBTEX
@article{BUT133851,
author="Andrej {Singer} and Sheena K. K. {Patel} and Roopali {Kukreja} and Vojtěch {Uhlíř} and James {Wingert} and Sven {Festersen} and Diling {Zhu} and James M. {Glownia} and Henrik T. {Lemke} and Silke {Nelson} and Michael {Kozina} and Kai {Rossnagel} and Michael {Bauer} and Bridget M. {Murphy} and Olaf M. {Magnussen} and E.E. {Fullerton} and Oleg {Shpyrko},
title="Photoinduced Enhancement of the Charge Density Wave Amplitude",
year="2016",
volume="117",
number="5",
month="March",
pages="056401-1--056401-6",
issn="1079-7114"
}