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  Correlation-driven electronic reconstruction in FeTe1-xSex

Huang, J., Yu, R., Xu, Z., Zhu, J.-X., Oh, J. S., Jiang, Q., et al. (2022). Correlation-driven electronic reconstruction in FeTe1-xSex. Communications Physics, 5(1): 29, pp. 1-9. doi:10.1038/s42005-022-00805-6.

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Huang, Jianwei1, Author
Yu, Rong1, Author
Xu, Zhijun1, Author
Zhu, Jian-Xin1, Author
Oh, Ji Seop1, Author
Jiang, Qianni1, Author
Wang, Meng1, Author
Wu, Han1, Author
Chen, Tong1, Author
Denlinger, Jonathan D.1, Author
Mo, Sung-Kwan1, Author
Hashimoto, Makoto1, Author
Michiardi, Matteo2, Author              
Pedersen, Tor M.1, Author
Gorovikov, Sergey1, Author
Zhdanovich, Sergey1, Author
Damascelli, Andrea1, Author
Gu, Genda1, Author
Dai, Pengcheng1, Author
Chu, Jiun-Haw1, Author
Lu, Donghui1, AuthorSi, Qimiao1, AuthorBirgeneau, Robert J.1, AuthorYi, Ming1, Author more..
Affiliations:
1External Organizations, ou_persistent22              
2Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              

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 Abstract: The underlying mechanism of iron-based superconductivity, the role of electron correlations, and the extent to which the behavior resembles those of the cuprates has been debated since their discovery. Here, using angle resolved photoemission spectroscopy, the authors report reconstruction of the Fermi surface for FeTe1-xSex driven by orbital-dependent correlation effects in the absence of symmetry breaking and find evidence for an orbital-selective Mott transition. Electronic correlation is of fundamental importance to high temperature superconductivity. While the low energy electronic states in cuprates are dominantly affected by correlation effects across the phase diagram, observation of correlation-driven changes in fermiology amongst the iron-based superconductors remains rare. Here we present experimental evidence for a correlation-driven reconstruction of the Fermi surface tuned independently by two orthogonal axes of temperature and Se/Te ratio in the iron chalcogenide family FeTe1-xSex. We demonstrate that this reconstruction is driven by the de-hybridization of a strongly renormalized d(xy) orbital with the remaining itinerant iron 3d orbitals in the emergence of an orbital-selective Mott phase. Our observations are further supported by our theoretical calculations to be salient spectroscopic signatures of such a non-thermal evolution from a strongly correlated metallic phase into an orbital-selective Mott phase in d(xy) as Se concentration is reduced.

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Language(s): eng - English
 Dates: 2022-01-262022-01-26
 Publication Status: Published in print
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Title: Communications Physics
Source Genre: Journal
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Publ. Info: London : Nature Publishing Group
Pages: - Volume / Issue: 5 (1) Sequence Number: 29 Start / End Page: 1 - 9 Identifier: ISSN: 2399-3650
CoNE: https://pure.mpg.de/cone/journals/resource/2399-3650