Imperial College London
Alternate

ProfessorArashMostofi

Faculty of Engineering, Department of Materials

Professor of Theory and Simulation of Materials
 
 
 
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Contact

 

+44 (0)20 7594 8154a.mostofi Website

 
 
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Location

 

Bessemer B332Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Tidey:2022:10.1103/PhysRevB.106.085112,
author = {Tidey, JP and Keegan, C and Bristowe, NC and Mostofi, AA and Hong, Z-M and Chen, B-H and Chuang, Y-C and Chen, W-T and Senn, MS},
doi = {10.1103/PhysRevB.106.085112},
journal = {Physical Review B},
title = {Structural origins of the low-temperature orthorhombic to low-temperature tetragonal phase transition in high-Tc cuprates},
url = {http://dx.doi.org/10.1103/PhysRevB.106.085112},
volume = {106},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - We undertake a detailed high-resolution diffraction study of a plain band insulator, La2MgO4, whichmay be viewed as a structural surrogate system of the undoped end-member of the high-Tc superconductorfamily La2−x−yA2+x R3+y CuO4 (A = Ba, Sr; R = rare earth). We find that La2MgO4 exhibits the infamous lowtemperature orthorhombic (LTO) to low-temperature tetragonal (LTT) phase transition that has been linked to thesuppression 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 octahedraltilt angle in the 4–5 range, similar to that which has previously been identified as a critical tipping pointfor superconductivity in these systems. We show that this phase transition, occurring in a system lackingspin correlations and competing electronic states such as charge density waves and superconductivity, can beunderstood by simply navigating the density functional theory ground-state energy landscape as a function ofthe order parameter amplitude. This result calls for a careful reinvestigation of the origins of the phase transitionsin high-Tc superconductors based on the hole-doped, n = 1 Ruddlesden-Popper lanthanum cuprates.
AU  - Tidey,JP
AU  - Keegan,C
AU  - Bristowe,NC
AU  - Mostofi,AA
AU  - Hong,Z-M
AU  - Chen,B-H
AU  - Chuang,Y-C
AU  - Chen,W-T
AU  - Senn,MS
DO  - 10.1103/PhysRevB.106.085112
PY  - 2022///
SN  - 2469-9950
TI  - Structural origins of the low-temperature orthorhombic to low-temperature tetragonal phase transition in high-Tc cuprates
T2  - Physical Review B
UR  - http://dx.doi.org/10.1103/PhysRevB.106.085112
UR  - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000843201200007&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://journals.aps.org/prb/abstract/10.1103/PhysRevB.106.085112
UR  - http://hdl.handle.net/10044/1/104986
VL  - 106
ER  -
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