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  The ferroelectric photo ground state of SrTiO3: Cavity materials engineering

Latini, S., Shin, D., Sato, S., Schäfer, C., de Giovannini, U., Hübener, H., et al. (2021). The ferroelectric photo ground state of SrTiO3: Cavity materials engineering. Proceedings of the National Academy of Sciences of the United States of America, 118(31): e2105618118. doi:10.1073/pnas.2105618118.

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https://arxiv.org/abs/2101.11313 (Preprint)
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https://dx.doi.org/10.1073/pnas.2105618118 (Publisher version)
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 Creators:
Latini, S.1, 2, Author              
Shin, D.1, 2, Author              
Sato, S.1, 2, 3, Author              
Schäfer, C.1, 2, Author              
de Giovannini, U.1, 2, 4, Author              
Hübener, H.1, 2, Author              
Rubio, A.1, 2, 4, 5, Author              
Affiliations:
1Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
2Center for Free Electron Laser Science, ou_persistent22              
3Center for Computational Sciences, University of Tsukuba, ou_persistent22              
4Nano-Bio Spectroscopy Group, Departamento de Fisica de Materiales, Universidad del Paìs Vasco UPV/EHU, ou_persistent22              
5Center for Computational Quantum Physics (CCQ), The Flatiron Institute, ou_persistent22              

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Free keywords: cavity materials engineering, quantum paraelectric to ferroelectric transition, strong light–matter hybrids, polaritons, SrTiO3 cavity phase diagram
 Abstract: Controlling collective phenomena in quantum materials is a promising route toward engineering material properties on demand. Strong THz lasers have been successful at inducing ferroelectricity in SrTiO3. Here we demonstrate, from atomistic calculations, that cavity quantum vacuum fluctuations induce a change in the collective phase of SrTiO3 in the strong light–matter coupling regime. Under these conditions, the ferroelectric phase is stabilized as the ground state, instead of the quantum paraelectric one. We conceptualize this light–matter hybrid state as a material photo ground state: Fundamental properties such as crystal structure, phonon frequencies, and the collective phase of a material are determined by the quantum light–matter coupling in equilibrium conditions. Cavity-coupling adds a new dimension to the phase diagram of SrTiO3.

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Language(s): eng - English
 Dates: 2021-03-312021-06-152021-07-272021-08-03
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: arXiv: 2101.11313
DOI: 10.1073/pnas.2105618118
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Title: Proceedings of the National Academy of Sciences of the United States of America
  Other : PNAS
  Other : Proceedings of the National Academy of Sciences of the USA
  Abbreviation : Proc. Natl. Acad. Sci. U. S. A.
Source Genre: Journal
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Publ. Info: Washington, D.C. : National Academy of Sciences
Pages: - Volume / Issue: 118 (31) Sequence Number: e2105618118 Start / End Page: - Identifier: ISSN: 0027-8424
CoNE: https://pure.mpg.de/cone/journals/resource/954925427230