Please use this identifier to cite or link to this item: https://doi.org/10.1038/srep03823
Title: Optical properties of a vibrationally modulated solid state Mott insulator
Authors: Kaiser, S.
Clark, S.R. 
Nicoletti, D.
Cotugno, G.
Tobey, R.I.
Dean, N.
Lupi, S.
Okamoto, H.
Hasegawa, T.
Jaksch, D. 
Cavalleri, A.
Issue Date: 22-Jan-2014
Source: Kaiser, S., Clark, S.R., Nicoletti, D., Cotugno, G., Tobey, R.I., Dean, N., Lupi, S., Okamoto, H., Hasegawa, T., Jaksch, D., Cavalleri, A. (2014-01-22). Optical properties of a vibrationally modulated solid state Mott insulator. Scientific Reports 4 : -. ScholarBank@NUS Repository. https://doi.org/10.1038/srep03823
Abstract: Optical pulses at THz and mid-infrared frequencies tuned to specific vibrational resonances modulate the lattice along chosen normal mode coordinates. In this way, solids can be switched between competing electronic phases and new states are created. Here, we use vibrational modulation to make electronic interactions (Hubbard-U) in Mott-insulator time dependent. Mid-infrared optical pulses excite localized molecular vibrations in ET-F 2 TCNQ, a prototypical one-dimensional Mott-insulator. A broadband ultrafast probe interrogates the resulting optical spectrum between THz and visible frequencies. A red-shifted charge-transfer resonance is observed, consistent with a time-averaged reduction of the electronic correlation strength U. Secondly, a sideband manifold inside of the Mott-gap appears, resulting from a periodically modulated U. The response is compared to computations based on a quantum-modulated dynamic Hubbard model. Heuristic fitting suggests asymmetric holon-doublon coupling to the molecules and that electron double-occupancies strongly squeeze the vibrational mode.
Source Title: Scientific Reports
URI: http://scholarbank.nus.edu.sg/handle/10635/116499
ISSN: 20452322
DOI: 10.1038/srep03823
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

20
checked on Feb 15, 2018

WEB OF SCIENCETM
Citations

18
checked on Jan 29, 2018

Page view(s)

29
checked on Feb 12, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.