Please use this identifier to cite or link to this item:
|Title:||Quantum interference between charge excitation paths in a solid-state Mott insulator|
|Citation:||Wall, S., Brida, D., Clark, S.R., Ehrke, H.P., Jaksch, D., Ardavan, A., Bonora, S., Uemura, H., Takahashi, Y., Hasegawa, T., Okamoto, H., Cerullo, G., Cavalleri, A. (2011-02). Quantum interference between charge excitation paths in a solid-state Mott insulator. Nature Physics 7 (2) : 114-118. ScholarBank@NUS Repository. https://doi.org/10.1038/nphys1831|
|Abstract:||Competition between electron localization and delocalization in Mott insulators underpins the physics of strongly correlated electron systems. Photoexcitation, which redistributes charge, can control this many-body process on the ultrafast1,2 timescale. So far, time-resolved studies have been carried out in solids in which other degrees of freedom, such as lattice, spin or orbital excitations3-5, dominate. However, the underlying quantum dynamics of bareg electronic excitations has remained out of reach. Quantum many-body dynamics are observed only in the controlled environment of optical lattices6,7 where the dynamics are slower and lattice excitations are absent. By using nearly single-cycle near-infrared pulses, we have measured coherent electronic excitations in the organic salt ET-F 2 TCNQ, a prototypical one-dimensional Mott insulator. After photoexcitation, a new resonance appears, which oscillates at 25THz. Time-dependent simulations of the Mottg Hubbard Hamiltonian reproduce the oscillations, showing that electronic delocalization occurs through quantum interference between bound and ionized holong doublon pairs. © 2011 Macmillan Publishers Limited. All rights reserved.|
|Source Title:||Nature Physics|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Aug 18, 2018
WEB OF SCIENCETM
checked on Jul 11, 2018
checked on Jun 29, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.