Journal Article

PUBDB-2016-02864

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png THz-Frequency Modulation of the Hubbard U in an Organic Mott Insulator

Singla, R. (Corresponding author)Extern* ; Cotugno, G.Extern* ; Kaiser, S. ; Först, M.CFEL*MPG* ; Mitrano, M.Extern* ; Liu, H. Y. ; Cartella, A.CFEL*MPG* ; Manzoni, C. ; Okamoto, H. ; Hasegawa, T.CFEL*MPG* ; Clark, S. R. ; Jaksch, D. ; Cavalleri, A.CFEL*MPG*

2015
APS College Park, Md.

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Please use a persistent id in citations: doi:10.1103/PhysRevLett.115.187401

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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Contributing Institute(s):

1. Forschungsgruppe für strukturelle Dynamik (MPSD)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)
2. Q-MAC - Frontiers in Quantum Materials Control (319286) (319286)

Experiment(s):

1. No specific instrument

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Database coverage:
; ; ; Current Contents - Physical, Chemical and Earth Sciences ; IF >= 5 ; JCR ; NCBI Molecular Biology Database ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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