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  THz-Frequency Modulation of the Hubbard U in an Organic Mott Insulator

Singla, R., Cotugno, G., Kaiser, S., Forst, M., Mitrano, M., Liu, H., et al. (2015). THz-Frequency Modulation of the Hubbard U in an Organic Mott Insulator. Physical Review Letters, 115(18): 187401.

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 Creators:
Singla, R., Author
Cotugno, G., Author
Kaiser, S.1, 2, Author           
Forst, M., Author
Mitrano, M., Author
Liu, H.3, Author           
Cartella, A., Author
Manzoni, C., Author
Okamoto, H., Author
Hasegawa, T., Author
Clark, S., Author
Jaksch, D., Author
Cavalleri, A., Author
Affiliations:
1Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society, ou_3370480              
2Former Research Groups, Max Planck Institute for Solid State Research, Max Planck Society, ou_3370500              
3Abteilung Jansen, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society, ou_3370503              

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 Abstract: We use midinfrared pulses with stable carrier-envelope phase offset to drive molecular vibrations in the charge transfer salt ET-F(2)TCNQ, a prototypical one-dimensional Mott insulator. We find that the Mott gap, which is probed resonantly with 10 fs laser pulses, oscillates with the pump field. This observation reveals that molecular excitations can coherently perturb the electronic on-site interactions (Hubbard U) by changing the local orbital wave function. The gap oscillates at twice the frequency of the vibrational mode, indicating that the molecular distortions couple quadratically to the local charge density.

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Language(s): eng - English
 Dates: 2015
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Internal
 Identifiers: eDoc: 713772
ISI: 000363787600018
 Degree: -

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Title: Physical Review Letters
Source Genre: Journal
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Pages: - Volume / Issue: 115 (18) Sequence Number: 187401 Start / End Page: - Identifier: ISSN: 0031-9007