Possible observation of parametrically amplified coherent phasons in K 0.3MoO3 using time-resolved extreme-ultraviolet angle-resolved photoemission spectroscopy

Research output: Contribution to journal › Research article › Contributed › peer-review

Contributors

  • H. Y. Liu - , Center for Free-Electron Laser Science (CFEL) (Author)
  • I. Gierz - , Center for Free-Electron Laser Science (CFEL) (Author)
  • J. C. Petersen - , Center for Free-Electron Laser Science (CFEL), University of Oxford (Author)
  • S. Kaiser - , Max Planck Institute for the Structure and Dynamics of Matter, Center for Free-Electron Laser Science (CFEL) (Author)
  • A. Simoncig - , Center for Free-Electron Laser Science (CFEL) (Author)
  • A. L. Cavalieri - , Center for Free-Electron Laser Science (CFEL) (Author)
  • C. Cacho - , Rutherford Appleton Laboratory (Author)
  • I. C.E. Turcu - , Rutherford Appleton Laboratory (Author)
  • E. Springate - , Rutherford Appleton Laboratory (Author)
  • F. Frassetto - , National Research Council of Italy (CNR) (Author)
  • L. Poletto - , National Research Council of Italy (CNR) (Author)
  • S. S. Dhesi - , Diamond Light Source (Author)
  • Z. A. Xu - , Zhejiang University (Author)
  • T. Cuk - , University of California at Berkeley (Author)
  • R. Merlin - , University of Michigan, Ann Arbor (Author)
  • A. Cavalleri - , Center for Free-Electron Laser Science (CFEL), University of Oxford (Author)

Abstract

We use time- and angle-resolved photoemission spectroscopy in the extreme ultraviolet to measure the time- and momentum-dependent electronic structures of photoexcited K0.3MoO3. Prompt depletion of the charge-density wave condensate launches coherent oscillations of the amplitude mode, observed as a 1.7-THz-frequency modulation of the bonding band position. In contrast, the antibonding band oscillates at about half this frequency. We attribute these oscillations to coherent excitation of phasons via parametric amplification of phase fluctuations.

Details

Original languageEnglish
Article number045104
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume88
Issue number4
Publication statusPublished - 2 Jul 2013
Peer-reviewedYes
Externally publishedYes

External IDs

ORCID /0000-0001-9862-2788/work/142255399

Keywords

ASJC Scopus subject areas