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  Photoinduced Electron Pairing in a Driven Cavity

Gao, H., Schlawin, F., Buzzi, M., Cavalleri, A., & Jaksch, D. (2020). Photoinduced Electron Pairing in a Driven Cavity. Physical Review Letters, 125(5): 053602. doi:10.1103/PhysRevLett.125.053602.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-02ED-D Version Permalink: http://hdl.handle.net/21.11116/0000-0006-CE1F-1
Genre: Journal Article

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PhysRevLett.125.053602.pdf (Publisher version), 559KB
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Photo_induced_pairing_reresubmit_SM.pdf (Supplementary material), 525KB
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Supplemental Material contains the derivation of the full system Hamiltonian, discussions of the different interaction terms along with the required driving intensity for the diamagnetic interactions to dominate the dynamics, RPA screening calculations, the Dyson equation for the pair-scattering vertex, how to calculate the cavity photon population and discussions on laser-induced heating.
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https://arxiv.org/abs/2003.05319 (Preprint)
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 Creators:
Gao, H.1, Author
Schlawin, F.1, Author
Buzzi, M.2, Author              
Cavalleri, A.1, 2, Author              
Jaksch, D.1, Author
Affiliations:
1Clarendon Laboratory, University of Oxford, ou_persistent22              
2Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938293              

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 Abstract: We demonstrate how virtual scattering of laser photons inside a cavity via two-photon processes can induce controllable long-range electron interactions in two-dimensional materials. We show that laser light that is red (blue) detuned from the cavity yields attractive (repulsive) interactions whose strength is proportional to the laser intensity. Furthermore, we find that the interactions are not screened effectively except at very low frequencies. For realistic cavity parameters, laser-induced heating of the electrons by inelastic photon scattering is suppressed and coherent electron interactions dominate. When the interactions are attractive, they cause an instability in the Cooper channel at a temperature proportional to the square root of the driving intensity. Our results provide a novel route for engineering electron interactions in a wide range of two-dimensional materials including AB-stacked bilayer graphene and the conducting interface between LaAlO3 and SrTiO3.

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Language(s): eng - English
 Dates: 2020-03-102020-06-052020-07-282020-07-31
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1103/PhysRevLett.125.053602
arXiv: 2003.05319
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Grant ID : 319286
Funding program : Funding Programme 7 (FP7)
Funding organization : European Commission (EC)

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Title: Physical Review Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 125 (5) Sequence Number: 053602 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1