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

Liu, Haiyun; Gierz, Isabella; Petersen, Jesse C.; Kaiser, Stefan; Simoncig, Alberto; Cavalieri, Adrian L.; Cacho, C.; Turcu, I. C. E.; Springate, E.; Frassetto, F.; Poletto, L.; Dhesi, S. S.; Xu, Z.-A.; Cuk, T.; Merlin, R.; Cavalleri, Andrea

doi:10.1103/PhysRevB.88.045104

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Possible observation of parametrically amplified coherent phasons in K_0.3MoO₃ using time-resolved extreme-ultraviolet angle-resolved photoemission spectroscopy

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http://dx.doi.org/10.1103/PhysRevB.88.045104
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http://arxiv.org/abs/1206.5743
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Citation

Liu, H., Gierz, I., Petersen, J. C., Kaiser, S., Simoncig, A., Cavalieri, A. L., et al. (2013). Possible observation of parametrically amplified coherent phasons in K_0.3MoO₃ using time-resolved extreme-ultraviolet angle-resolved photoemission spectroscopy. Physical Review B, 88(4): 045104. doi:10.1103/PhysRevB.88.045104.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0019-8C88-9

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.