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Spin-orbital polarons in electron doped copper oxides

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journal contribution
posted on 07.12.2017 by Anna Kusmartseva, Heshan Yu, K. Jin, Feodor Kusmartsev
Present work demonstrates the formation of spin-orbital polarons in electron doped copper oxides, that arise due to doping-induced polarisation of the oxygen orbitals in the CuO2 planes. The concept of such polarons is fundamentally different from previous interpretations. The novel aspect of spin–orbit polarons is best described by electrons becoming self-trapped in one-dimensional channels created by polarisation of the oxygen orbitals. The one-dimensional channels form elongated filaments with two possible orientations, along the diagonals of the elementary CuO2 square plaquette. As the density of doped electrons increases multiple filaments are formed. These may condense into a single percolating filamentary phase. Alternatively, the filaments may cross perpendicularly to create an interconnected conducting quasi-one-dimensional web. At low electron doping the antiferromagnetic (AFM) state and the polaron web coexist. As the doping is increased the web of filaments modifies and transforms the AFM correla- tions leading to a series of quantum phase transitions - which affect the normal and superconducting state properties.

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School

  • Science

Department

  • Physics

Published in

Journal of Magnetism and Magnetic Materials

Citation

KUSMARTSEVA, A.F. ...et al., 2018. Spin-orbital polarons in electron doped copper oxides. Journal of Magnetism and Magnetic Materials, 459, pp.202-205.

Publisher

© Elsevier

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

08/11/2017

Publication date

2018

Notes

This paper was accepted for publication in the journal Journal of Magnetism and Magnetic Materials and the definitive published version is available at https://doi.org/10.1016/j.jmmm.2017.11.021

ISSN

0304-8853

Language

en

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