Possible observation of parametrically amplified coherent phasons in K0.3MoO3 using time-resolved extreme-ultraviolet angle-resolved photoemission spectroscopy
作者： H. Y. Liu , I. Gierz , J. C. Petersen , S. Kaiser , A. Simoncig
DOI: 10.1103/PHYSREVB.88.045104
关键词:
摘要: We use time- and angle-resolved photoemission spectroscopy in the extreme ultraviolet to measure momentum-dependent electronic structures of photoexcited K${}_{0.3}$MoO${}_{3}$. Prompt depletion charge-density wave condensate launches coherent oscillations amplitude mode, observed as a 1.7-THz-frequency modulation bonding band position. In contrast, antibonding oscillates at about half this frequency. attribute these excitation phasons via parametric amplification phase fluctuations.
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