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THz-frequency modulation of the Hubbard U in an organic Mott insulator


Reference:

Singla, R., Cotugno, G., Kaiser, S., Först, M., Mitrano, M., Liu, H. Y., Cartella, A., Manzoni, C., Okamoto, H., Hasegawa, T., Clark, S. R., Jaksch, D. and Cavalleri, A., 2015. THz-frequency modulation of the Hubbard U in an organic Mott insulator. Physical Review Letters, 115 (18), 187401.

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    Official URL:

    http://dx.doi.org/10.1103/PhysRevLett.115.187401

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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-F2TCNQ, 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.

    Details

    Item Type Articles
    CreatorsSingla, R., Cotugno, G., Kaiser, S., Först, M., Mitrano, M., Liu, H. Y., Cartella, A., Manzoni, C., Okamoto, H., Hasegawa, T., Clark, S. R., Jaksch, D. and Cavalleri, A.
    DOI10.1103/PhysRevLett.115.187401
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    URLURL Type
    http://www.scopus.com/inward/record.url?scp=84946200316&partnerID=8YFLogxKUNSPECIFIED
    DepartmentsFaculty of Science > Physics
    RefereedYes
    StatusPublished
    ID Code48265

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