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Evolution of charge order topology across a magnetic phase transition in cuprate superconductors

Kang, Mingu and Pelliciari, Jonathan and Frano, Alex and Breznay, Nicholas and Schierle, Enrico and Weschke, Eugen and Sutarto, Ronny and He, Feizhou and Shafer, Padraic and Arenholz, Elke and Chen, Mo and Zhang, Keto and Ruiz, Alejandro and Hao, Zeyu and Lewin, Sylvia and Analytis, James and Krockenberger, Yoshiharu and Yamamoto, Hideki and Das, Tanmoy and Comin, Riccardo (2019) Evolution of charge order topology across a magnetic phase transition in cuprate superconductors. In: NATURE PHYSICS, 15 (4). 335+.

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Official URL: https://doi.org/10.1038/s41567-018-0401-8

Abstract

Charge order is now accepted as an integral constituent of cuprate high-temperature superconductors, one that is intimately related to other electronic instabilities including antiferromagnetism and superconductivity(1-11). Unlike conventional Peierls density waves, the charge correlations in cuprates have been predicted to display a rich momentum space topology depending on the underlying fermiology(12-18). However, charge order has only been observed along the high-symmetry Cu-O bond directions. Here, using resonant soft X-ray scattering, we investigate the evolution of the full momentum space topology of charge correlations in T'-(Nd,Pr)(2)CuO4 as a function of electron doping. We report that, when the parent Mott insulator is doped, charge correlations first emerge with full rotational symmetry in momentum space, indicating glassy charge density modulation in real space possibly seeded by local defects. At higher doping levels, the orientation of charge correlations is locked to the Cu-O bond directions, restoring a more conventional long-ranged bidirectional charge order. Through charge susceptibility calculations, we reproduce the evolution in topology of charge correlations across the antiferromagnetic phase boundary and propose a revised phase diagram of T'-Ln(2)CuO(4) with a superconducting region extending toward the Mott limit.

Item Type: Journal Article
Additional Information: Copy right for this article belong to Nature Publishing Group
Keywords: Antiferromagnetism Copper compounds High temperature superconductors Topology
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Depositing User: Id for Latest eprints
Date Deposited: 29 May 2019 12:19
Last Modified: 29 May 2019 12:19
URI: http://eprints.iisc.ac.in/id/eprint/62270

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