Electronic Reconstruction Towards Topological Superconductivity in FeTe

@misc{rong2026electronic,
  title = {{Electronic Reconstruction Towards Topological Superconductivity in FeTe}},
  author = {Hongtao Rong and Yang Ge and Zi-Jie Yan and Haoran Lin and Bing Xia and Xiaoda Liu and Zihao Wang and Pu Xiao and Lok-Kan Lai and Stephen Paplini and Jiatao Song and Jiangang Yang and Peter J. Hirschfeld and Shuolong Yang and Jiabin Yu and Cui-Zu Chang},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.24843},
  eprint = {2609.24843},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.24843},
}

TY  - UNPB
TI  - Electronic Reconstruction Towards Topological Superconductivity in FeTe
AU  - Hongtao Rong
AU  - Yang Ge
AU  - Zi-Jie Yan
AU  - Haoran Lin
AU  - Bing Xia
AU  - Xiaoda Liu
AU  - Zihao Wang
AU  - Pu Xiao
AU  - Lok-Kan Lai
AU  - Stephen Paplini
AU  - Jiatao Song
AU  - Jiangang Yang
AU  - Peter J. Hirschfeld
AU  - Shuolong Yang
AU  - Jiabin Yu
AU  - Cui-Zu Chang
PY  - 2026
DA  - 2026/09/21
PB  - arXiv
DO  - 10.48550/arxiv.2609.24843
UR  - https://arxiv.org/abs/2609.24843
AB  - The recent discovery of intrinsic superconductivity in stoichiometric FeTe films has renewed interest in the Te-rich end member of the iron chalcogenides for studies of unconventional and topological superconductivity, yet its intrinsic electronic structure remains unresolved. In this work, we combine molecular beam epitaxy, angle-resolved photoemission spectroscopy (ARPES), electrical transport measurements, density functional theory, and embedded dynamical mean-field theory to track the electronic reconstruction of 20-unit-cell FeTe films as Te annealing progressively removes excess interstitial Fe and drives the system from an antiferromagnetic metal to a superconductor. We find that this evolution is accompanied by recovered quasiparticle coherence, reduced electronic correlations, a Lifshitz transition, and a topological phase transition, yielding dxy-dominated hole and electron pockets that favor inter-pocket scattering. In addition, a shallow dxz/dyz-derived hole band located about 2 meV below the Fermi level may provide an incipient-band pairing channel, while scattering between the two electron pockets at M may offer additional pairing channels. High-resolution polarization-dependent laser ARPES measurements further reveal a topological surface state whose circular dichroism is consistent with the expected orbital-angular-momentum texture of stoichiometric FeTe. These results establish the intrinsic low-energy electronic structure of superconducting FeTe and identify the electronic states most relevant to superconductivity. The coexistence of intrinsic superconductivity and a topological surface state establishes stoichiometric FeTe as a promising platform for exploring topological superconductivity and possible Majorana bound states.
ER  -