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

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...

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Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1103/physrevlett.115.187401

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Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Role:
Author
Publisher:
American Physical Society Publisher's website
Journal:
Physical Review Letters Journal website
Volume:
115
Issue:
18
Article number:
187401
Publication date:
2015-10-29
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
Language:
English
Pubs id:
pubs:574527
UUID:
uuid:03bb85cf-35c9-4f14-8d89-618f9d2610d4
Local pid:
pubs:574527
Source identifiers:
574527
Deposit date:
2016-01-26

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