Journal Article

PUBDB-2022-07153

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Scale-Free Distribution of Oxygen Interstitial Wires in Optimum-Doped HgBa$_2$CuO$_{4+y}$

Campi, G. (Corresponding author)Extern* ; Mazziotti, M. V. ; Jarlborg, T. ; Bianconi, A. (Corresponding author)Extern*

2022
MDPI Basel

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Please use a persistent id in citations: doi:10.3390/condmat7040056  doi:10.3204/PUBDB-2022-07153

Abstract: Novel nanoscale probes are opening new venues for understanding unconventional electronic and magnetic functionalities driven by multiscale lattice complexity in doped high-temperature superconducting perovskites. In this work, we focus on the multiscale texture at supramolecular level of oxygen interstitial (O-i) atomic stripes in HgBa$_2$CuO$_{4+}$y at optimal doping for the highest superconducting critical temperature (T$_C$) of 94 K. We report compelling evidence for the nematic phase of oxygen interstitial O-i atomic wires with fractal-like spatial distribution over multiple scales using scanning micro- and nano-X-ray diffraction. The scale-free distribution of O-i atomic wires at optimum doping extending from the micron down to the nanoscale has been associated with the intricate filamentary network of hole-rich metallic wires in the CuO$_2$ plane. The observed critical opalescence provides evidence for the proximity to a critical point that controls the emergence of high-temperature superconductivity at optimum doping.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)

Research Program(s):

1. 899 - ohne Topic (POF4-899) (POF4-899)

Experiment(s):

1. DORIS Beamline BW5 (DORIS III)

Appears in the scientific report 2022

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Database coverage:
; ; ; ; Article Processing Charges ; Clarivate Analytics Master Journal List ; DOAJ Seal ; Emerging Sources Citation Index ; Fees ; Web of Science Core Collection

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