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

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hdl:2117/79140
Document typeArticle
Defense date2015-09-18
PublisherNature Publishing Group
Rights accessOpen Access
This work is protected by the corresponding intellectual and industrial property rights.
Except where otherwise noted, its contents are licensed under a Creative Commons license
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Attribution-NonCommercial-NoDerivs 3.0 Spain
ProjectCALIPSO - Coordinated Access to Lightsources to Promote Standards and Optimization (EC-FP7-312284)
QUIC - Quantum simulations of insulators and conductors (EC-H2020-641122)
DCCM - Dynamically controlling the properties of complex materials with light (EC-FP7-618487)
QUIC - Quantum simulations of insulators and conductors (EC-H2020-641122)
DCCM - Dynamically controlling the properties of complex materials with light (EC-FP7-618487)
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.
ISSN2041-1723
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