Research

Deconstructing the Hubbard Hamiltonian by Ultrafast Quantum Modulation Spectroscopy in Solid-state Mott Insulators


Reference:

Kaiser, S., Clark, S. R., Nicoletti, D., Cotugno, G., Tobey, R. I., Dean, N., Lupi, S., Okamoto, H., Hasegawa, T., Jaksch, D. and Cavalleri, A., 2014. Deconstructing the Hubbard Hamiltonian by Ultrafast Quantum Modulation Spectroscopy in Solid-state Mott Insulators. Scientific Reports, 4, 3823.

Related documents:

[img]
Preview
PDF (srep03823) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Download (1994kB) | Preview

    Official URL:

    http://dx.doi.org/10.1038/srep03823

    Abstract

    Most available theories for correlated electron transport are based on the Hubbard Hamiltonian. In this effective theory, renormalized hopping and interaction parameters only implicitly incorporate the coupling of correlated charge carriers to microscopic degrees of freedom. Unfortunately, no spectroscopy can individually probe such renormalizations, limiting the applicability of Hubbard models. We show here that the role of each individual degree of freedom can be made explicit by using a new experimental technique, which we term 'quantum modulation spectroscopy' and we demonstrate here in the one-dimensional Mott insulator ET-F2TCNQ. We explore the role on the charge hopping of two localized molecular modes, which we drive with a mid infrared optical pulse. Sidebands appear in the modulated optical spectrum, and their linshape is fitted with a model based on the dynamic Hubbard Hamiltonian. A striking asymmetry between the renormalization of doublons and holons is revealed. The concept of quantum modulation spectroscopy can be used to systematically deconstruct Hubbard Hamiltonians in many materials, exposing the role of any mode, electronic or magnetic, that can be driven to large amplitude with a light field.

    Details

    Item Type Articles
    CreatorsKaiser, S., Clark, S. R., Nicoletti, D., Cotugno, G., Tobey, R. I., Dean, N., Lupi, S., Okamoto, H., Hasegawa, T., Jaksch, D. and Cavalleri, A.
    DOI10.1038/srep03823
    Uncontrolled Keywordscond-mat.str-el
    DepartmentsFaculty of Science > Physics
    RefereedYes
    StatusPublished
    ID Code47338
    Additional Information20 pages, 5 figures

    Export

    Actions (login required)

    View Item

    Document Downloads

    More statistics for this item...