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Title: Honeycomb‐Layered Oxides With Silver Atom Bilayers and Emergence of Non‐Abelian SU(2) Interactions
Authors: Masese, Titus
Kanyolo, Godwill Mbiti
Miyazaki, Yoshinobu
Ito, Miyu
Taguchi, Noboru
Rizell, Josef
Tachibana, Shintaro
Tada, Kohei
Huang, Zhen‐Dong
Alshehabi, Abbas
Ubukata, Hiroki
Kubota, Keigo
Yoshii, Kazuki
Senoh, Hiroshi
Tassel, Cédric
Orikasa, Yuki
Kageyama, Hiroshi
Saito, Tomohiro
Author's alias: 生方, 宏樹
陰山, 洋
Keywords: aberration-corrected transmission electron microscopy
argentophilic in-teractions
honeycomb-layered oxides
silver bilayers
sub-valent degener-ate states
Issue Date: 24-Feb-2023
Publisher: Wiley
Journal title: Advanced Science
Volume: 10
Issue: 6
Thesis number: 2204672
Abstract: Honeycomb-layered oxides with monovalent or divalent, monolayeredcationic lattices generally exhibit myriad crystalline features encompassingrich electrochemistry, geometries, and disorders, which particularly placesthem as attractive material candidates for next-generation energy storageapplications. Herein, global honeycomb-layered oxide compositions, Ag₂M₂TeO₆(M=Ni, Mg, etc.) exhibiting Ag atom bilayers with sub-valentstates within Ag-rich crystalline domains of Ag₆M₂TeO₆and Ag-deficient domains of Ag₂ˍxNi₂TeO₆(0<x<2). The Ag-rich material characterized byaberration-corrected transmission electron microscopy reveals local atomicstructural disorders characterized by aperiodic stacking and incoherency inthe bilayer arrangement of Ag atoms. Meanwhile, the global material not onlydisplays high ionic conductivity but also manifests oxygen-holeelectrochemistry during silver-ion extraction. Within the Ag-rich domains, thebilayered structure, argentophilic interactions therein and the expected Agsub-valent states (1∕2+, 2∕3+, etc.) are theoretically understood viaspontaneous symmetry breaking of SU(2)×U(1) gauge symmetry interactionsamongst 3 degenerate mass-less chiral fermion states, justified by electronoccupancy of silver 4dz₂and 5sorbitals on a bifurcated honeycomb lattice.This implies that bilayered frameworks have research applications that gobeyond the confines of energy storage.
Rights: © 2022 The Authors. Advanced Science published by Wiley-VCH GmbH
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
URI: http://hdl.handle.net/2433/285316
DOI(Published Version): 10.1002/advs.202204672
PubMed ID: 36575151
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