Detail publikace

Zesílení amplitudy vln nábojové hustoty indukované světlem

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.

Český název

Zesílení amplitudy vln nábojové hustoty indukované světlem

Anglický název

Photoinduced Enhancement of the Charge Density Wave Amplitude

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

en

Originální abstrakt

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.

Český abstrakt

Článek se zabývá přechodným zesílením aplitudy vln nábojové hustoty až o 30% za pomoci ultrarychlé fotoexcitace.

Anglický abstrakt

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.

Klíčová slova česky

Chrom; Supravodivost; Vlny nábojové hustoty; Manganáty

Klíčová slova anglicky

Chromium; Superconductivity; Charge Density Waves; Manganites

Vydáno

20.03.2016

ISSN

1079-7114

Ročník

117

Číslo

5

Strany od–do

056401-1–056401-6

Počet stran

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"
}