Possible observation of parametrically amplified coherent phasons in K0.3MoO3using time-resolved extreme-ultraviolet angle-resolved photoemission spectroscopy

2012/06/30 by Haiyun Liu, H. Y. Liu, Isabella Gierz +24 · 1 citation
Chemistry · Earth and Planetary Sciences · Materials Science · Physics and Astronomy · #Amplitude #Angle-resolved photoemission spectroscopy #Astronomy #Atmospheric Ozone and Climate #Atomic physics #Excitation #Excited state #Optics #Phase (matter) #Photoemission spectroscopy #Physics #Quantum mechanics #Spectral line #Spectroscopy and Laser Applications #Transition Metal Oxide Nanomaterials #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.88.045104

4 figures

arxiv created 2013/04/11 · openalex publication_date 2013/07/02 · arxiv updated 2013/07/03 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We use time- and angle-resolved photoemission spectroscopy in the extreme ultraviolet to measure the time- and momentum-dependent electronic structures of photoexcited K_0.3MoO₃. 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.

Citations

• Femtosecond Structural Dynamics inVO2during an Ultrafast Solid-Solid Phase Transition
• Light-Induced Superconductivity in a Stripe-Ordered Cuprate
• Evidence for a structurally-driven insulator-to-metal transition inVO2: A view from the ultrafast timescale

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