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Pronounced interplay between intrinsic phase-coexistence and octahedral tilt magnitude in hole-doped lanthanum cuprates
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Tidey, Jeremiah P., Liu, En-Pei, Lai, Yen-Chung, Chuang, Yu-Chun, Chen, Wei-Tin, Cane, Lauren J., Lester, Chris, Petsch, Alexander N. D., Herlihy, Anna, Simonov, Arkadiy, Hayden, Stephen M. and Senn, Mark S. (2022) Pronounced interplay between intrinsic phase-coexistence and octahedral tilt magnitude in hole-doped lanthanum cuprates. Scientific Reports, 12 (1). 14343. doi:10.1038/s41598-022-18574-1 ISSN 2045-2322.
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Official URL: http://dx.doi.org/10.1038/s41598-022-18574-1
Abstract
Definitive understanding of superconductivity and its interplay with structural symmetry in the hole-doped lanthanum cuprates remains elusive. The suppression of superconductivity around 1/8th doping maintains particular focus, often attributed to charge-density waves (CDWs) ordering in the low-temperature tetragonal (LTT) phase. Central to many investigations into this interplay is the thesis that La1.875Ba0.125CuO4 and particularly La1.675Eu0.2Sr0.125CuO4 present model systems of purely LTT structure at low temperature. However, combining single-crystal and high-resolution powder X-ray diffraction, we find these to exhibit significant, intrinsic coexistence of LTT and low-temperature orthorhombic domains, typically associated with superconductivity, even at 10 K. Our two-phase models reveal substantially greater tilting of CuO6 octahedra in the LTT phase, markedly buckling the CuO2 planes. This would couple significantly to band narrowing, potentially indicating a picture of electronically driven phase segregation, reminiscent of optimally doped manganites. These results call for reassessment of many experiments seeking to elucidate structural and electronic interplay at 1/8 doping.
Item Type: | Journal Article | |||||||||||||||||||||
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Subjects: | Q Science > QC Physics Q Science > QD Chemistry |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | |||||||||||||||||||||
Library of Congress Subject Headings (LCSH): | Superconductivity, Lanthanum compounds, Crystallography | |||||||||||||||||||||
Journal or Publication Title: | Scientific Reports | |||||||||||||||||||||
Publisher: | Nature Publishing Group | |||||||||||||||||||||
ISSN: | 2045-2322 | |||||||||||||||||||||
Official Date: | 22 August 2022 | |||||||||||||||||||||
Dates: |
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Volume: | 12 | |||||||||||||||||||||
Number: | 1 | |||||||||||||||||||||
Number of Pages: | 13 | |||||||||||||||||||||
Article Number: | 14343 | |||||||||||||||||||||
DOI: | 10.1038/s41598-022-18574-1 | |||||||||||||||||||||
Status: | Peer Reviewed | |||||||||||||||||||||
Publication Status: | Published | |||||||||||||||||||||
Access rights to Published version: | Open Access (Creative Commons) | |||||||||||||||||||||
Date of first compliant deposit: | 7 September 2022 | |||||||||||||||||||||
Date of first compliant Open Access: | 9 September 2022 | |||||||||||||||||||||
RIOXX Funder/Project Grant: |
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