Binary kagome superconducting candidates hosting topological electronic states
Abstract
Topological superconductivity has attracted broad interest because of its connection to Majorana fermions and quantum computation. Kagome materials provide a natural setting in which interesting electronic structures, topological surface states, and superconductivity may occur in nearby energy windows. Here we carry out a systematic first-principles search for binary kagome superconducting candidates with topological electronic states across several structural families AmBn (m:n=3:1; 3:2; 1:1). The screening combines formation-energy and phonon-stability filtering, magnetic-ground-state searches, electron-phonon-coupling calculations, and topological electronic-structure analysis. We identify 286 nonmagnetic dynamically stable candidates for electron-phonon-coupling analysis, among which 84 have estimated transition temperatures above 3 K and seven exceed the ∼ 9 K reference scale of existing ambient-pressure kagome superconductors. In addition, several systems are predicted to host abundant topological surface states near the Fermi level. NbBi is identified as a ℤ2 topological metal with clear Dirac-cone topological surface states and a kagome-derived flat band near EF. Ti3Si, with the largest estimated Tc=15.2 K in this dataset, shows nodal-line-derived drumhead surface states and selected nodes that survive spin-orbit coupling near EF. Combining superconductivity with nontrivial topological electronic structures, the binary kagome compounds predicted here represent compact and chemically tunable candidate platforms for topological superconductivity and for exploring kagome-related quantum phenomena.
Versions
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BibTeX
@misc{yi2026binary,
title = {{Binary kagome superconducting candidates hosting topological electronic states}},
author = {Xin-Wei Yi and Jing-Yang You and Gang Su},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.03003},
eprint = {2610.03003},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.03003},
}
RIS
TY - UNPB
TI - Binary kagome superconducting candidates hosting topological electronic states
AU - Xin-Wei Yi
AU - Jing-Yang You
AU - Gang Su
PY - 2026
DA - 2026/10/02
PB - arXiv
DO - 10.48550/arxiv.2610.03003
UR - https://arxiv.org/abs/2610.03003
AB - Topological superconductivity has attracted broad interest because of its connection to Majorana fermions and quantum computation. Kagome materials provide a natural setting in which interesting electronic structures, topological surface states, and superconductivity may occur in nearby energy windows. Here we carry out a systematic first-principles search for binary kagome superconducting candidates with topological electronic states across several structural families A_mB_n (m:n=3:1; 3:2; 1:1). The screening combines formation-energy and phonon-stability filtering, magnetic-ground-state searches, electron-phonon-coupling calculations, and topological electronic-structure analysis. We identify 286 nonmagnetic dynamically stable candidates for electron-phonon-coupling analysis, among which 84 have estimated transition temperatures above 3 K and seven exceed the ∼ 9 K reference scale of existing ambient-pressure kagome superconductors. In addition, several systems are predicted to host abundant topological surface states near the Fermi level. NbBi is identified as a ℤ_2 topological metal with clear Dirac-cone topological surface states and a kagome-derived flat band near E_F. Ti_3Si, with the largest estimated T_c=15.2 K in this dataset, shows nodal-line-derived drumhead surface states and selected nodes that survive spin-orbit coupling near E_F. Combining superconductivity with nontrivial topological electronic structures, the binary kagome compounds predicted here represent compact and chemically tunable candidate platforms for topological superconductivity and for exploring kagome-related quantum phenomena.
ER -