Possible observation of parametrically amplified coherent phasons in K0.3MoO3 using time-resolved extreme-ultraviolet ARPES

H. Y. Liu; I. Gierz; J. C. Petersen; S. Kaiser; A. Simoncig; A. L. Cavalieri; C. Cacho; I. C. E. Turcu; E. Springate; F. Frassetto; L. Poletto; S. S. Dhesi; Z. -A. Xu; T. Cuk; R. Merlin; A. Cavalleri

doi:10.1103/PhysRevB.88.045104

Possible observation of parametrically amplified coherent phasons in K0.3MoO3 using time-resolved extreme-ultraviolet ARPES

Strongly Correlated Electrons 2013-07-03 v3 Superconductivity

Authors: H. Y. Liu , I. Gierz , J. C. Petersen , S. Kaiser , A. Simoncig , A. L. Cavalieri , C. Cacho , I. C. E. Turcu , E. Springate , F. Frassetto , L. Poletto , S. S. Dhesi , Z. -A. Xu , T. Cuk , R. Merlin , A. Cavalleri

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Abstract

We use time- and angle-resolved photoemission spectroscopy (tr-ARPES) in the Extreme Ultraviolet (EUV) to measure the time- and momentum-dependent electronic structure of photo-excited K0.3MoO3. Prompt depletion of the Charge Density Wave (CDW) condensate launches coherent oscillations of the amplitude mode, observed as a 1.7-THz-frequency modulation of the bonding band position. In contrast, the anti-bonding band oscillates at about half this frequency. We attribute these oscillations to coherent excitation of phasons via parametric amplification of phase fluctuations.

Keywords

time-resolved ARPES charge density wave phason parametric amplification K0.3MoO3 coherent oscillations amplitude mode

Cite

@article{arxiv.1206.5743,
  title  = {Possible observation of parametrically amplified coherent phasons in K0.3MoO3 using time-resolved extreme-ultraviolet ARPES},
  author = {H. Y. Liu and I. Gierz and J. C. Petersen and S. Kaiser and A. Simoncig and A. L. Cavalieri and C. Cacho and I. C. E. Turcu and E. Springate and F. Frassetto and L. Poletto and S. S. Dhesi and Z. -A. Xu and T. Cuk and R. Merlin and A. Cavalleri},
  journal= {arXiv preprint arXiv:1206.5743},
  year   = {2013}
}

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Possible observation of parametrically amplified coherent phasons in K0.3MoO3 using time-resolved extreme-ultraviolet ARPES

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