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Structural origins of the low-temperature orthorhombic to low-temperature tetragonal phase transition in high-Tc cuprates
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Tidey, Jeremiah P., Keegan, Christopher, Bristowe, Nicholas C., Mostofi, Arash A., Hong, Zih-Mei, Chen, Bo-Hao, Chuang, Yu-Chun, Chen, Wei-Tin and Senn, Mark S. (2022) Structural origins of the low-temperature orthorhombic to low-temperature tetragonal phase transition in high-Tc cuprates. Physical Review B (Condensed Matter and Materials Physics), 106 (8). 085112. doi:10.1103/PhysRevB.106.085112 ISSN 1098-0121.
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Official URL: http://dx.doi.org/10.1103/PhysRevB.106.085112
Abstract
We undertake a detailed high-resolution diffraction study of a plain band insulator, La2MgO4, which may be viewed as a structural surrogate system of the undoped end-member of the high-Tc superconductor family La2−x−yA2+xR3+yCuO4 (A=Ba,Sr; R=rare earth). We find that La2MgO4 exhibits the infamous low-temperature orthorhombic (LTO) to low-temperature tetragonal (LTT) phase transition that has been linked to the suppression of superconductivity in a variety of underdoped cuprates, including the well-known La2−xBaxCuO4 (x=0.125). Furthermore, we find that the LTO-to-LTT phase transition in La2MgO4 occurs for an octahedral tilt angle in the 4∘–5∘ range, similar to that which has previously been identified as a critical tipping point for superconductivity in these systems. We show that this phase transition, occurring in a system lacking spin correlations and competing electronic states such as charge density waves and superconductivity, can be understood by simply navigating the density functional theory ground-state energy landscape as a function of the order parameter amplitude. This result calls for a careful reinvestigation of the origins of the phase transitions in high-Tc superconductors based on the hole-doped, n=1 Ruddlesden-Popper lanthanum cuprates.
Item Type: | Journal Article | ||||||||||||||||||||||||
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Subjects: | Q Science > QC Physics Q Science > QD Chemistry T Technology > TA Engineering (General). Civil engineering (General) |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||||||||||||||||||||||
Library of Congress Subject Headings (LCSH): | Diffraction , Rare earths , Superconductors -- Chemistry, Materials at low temperatures, Superconductivity, High temperature superconductors -- Materials, Copper oxide superconductors, Phase transformations (Statistical physics) | ||||||||||||||||||||||||
Journal or Publication Title: | Physical Review B (Condensed Matter and Materials Physics) | ||||||||||||||||||||||||
Publisher: | American Physical Society | ||||||||||||||||||||||||
ISSN: | 1098-0121 | ||||||||||||||||||||||||
Official Date: | 8 August 2022 | ||||||||||||||||||||||||
Dates: |
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Volume: | 106 | ||||||||||||||||||||||||
Number: | 8 | ||||||||||||||||||||||||
Number of Pages: | 6 | ||||||||||||||||||||||||
Article Number: | 085112 | ||||||||||||||||||||||||
DOI: | 10.1103/PhysRevB.106.085112 | ||||||||||||||||||||||||
Status: | Peer Reviewed | ||||||||||||||||||||||||
Publication Status: | Published | ||||||||||||||||||||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||||||||||||||||||||
Date of first compliant deposit: | 12 October 2022 | ||||||||||||||||||||||||
Date of first compliant Open Access: | 12 October 2022 | ||||||||||||||||||||||||
RIOXX Funder/Project Grant: |
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