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

Autor:	Liu, H. Y., Gierz, I., Petersen, J. C., Kaiser, S., Simoncig, A., Cavalieri, A. L., Cacho, C., Turcu, I. C. E., Springate, E., Frassetto, F., Poletto, L., Dhesi, S. S., Xu, Z. -A., Cuk, T., Merlin, R., Cavalleri, A.
Rok vydání:	2012
Předmět:	Condensed Matter - Strongly Correlated Electrons Condensed Matter - Superconductivity
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.88.045104
Popis:	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. Comment: 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1206.5743 Zobrazit plný text záznamu View this record from Arxiv