Terahertz field control of in-plane orbital order in La0.5Sr1.5MnO4

Miller, Timothy and Chhajlany, Ravindra W. and Tagliacozzo, Luca and Green, Bertram and Kovalev, Sergey and Prabhakaran, Dharmalingam and Lewenstein, Maciej and Gensch, Michael and Wall, Simon (2015) Terahertz field control of in-plane orbital order in La0.5Sr1.5MnO4. Nature Communications, 6. pp. 1-7. 8175. ISSN 2041-1723 (https://doi.org/10.1038/ncomms9175)

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Abstract

In-plane anisotropic ground states are ubiquitous in correlated solids such as pnictides, cuprates and manganites. They can arise from doping Mott insulators and compete with phases such as superconductivity; however, their origins are debated. Strong coupling between lattice, charge, orbital and spin degrees of freedom results in simultaneous ordering of multiple parameters, masking the mechanism that drives the transition. Here we demonstrate that the orbital domains in a manganite can be oriented by the polarization of a pulsed THz light field. Through the application of a Hubbard model, we show that domain control can be achieved by enhancing the local Coulomb interactions, which drive domain reorientation. Our results highlight the key role played by the Coulomb interaction in the control and manipulation of orbital order in the manganites and demonstrate a new way to use THz to understand and manipulate anisotropic phases in a potentially broad range of correlated materials.

ORCID iDs

Miller, Timothy, Chhajlany, Ravindra W., Tagliacozzo, Luca ORCID logoORCID: https://orcid.org/0000-0002-5858-1587, Green, Bertram, Kovalev, Sergey, Prabhakaran, Dharmalingam, Lewenstein, Maciej, Gensch, Michael and Wall, Simon;
  • Item type:Article
    ID code:56429
    Dates:
    Date
    Event
    18 September 2015
    Published
    27 July 2015
    Accepted
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:19 May 2016 10:31
    Last modified:11 Nov 2024 11:23
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/56429
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