Discovery of charge order above room-temperature in the prototypical kagome superconductor La(Ru1−xFex)3Si2

I. Plokhikh; C. Mielke; H. Nakamura; V. Petricek; Y. Qin; V. Sazgari; J. Küspert; I. Biało; S. Shin; O. Ivashko; J. N. Graham; M. V. Zimmermann; M. Medarde; A. Amato; R. Khasanov; H. Luetkens; M. H. Fischer; M. Z. Hasan; J. X. Yin; T. Neupert; J. Chang; G. Xu; S. Nakatsuji; E. Pomjakushina; D. J. Gawryluk; Z. Guguchia

doi:10.1038/s42005-024-01673-y

Discovery of charge order above room-temperature in the prototypical kagome superconductor La(Ru_1−xFe_x)₃Si₂

I. Plokhikh, C. Mielke, H. Nakamura, V. Petricek, Y. Qin, V. Sazgari, J. Küspert, I. Biało, S. Shin, O. Ivashko, J. N. Graham, M. V. Zimmermann, M. Medarde, A. Amato, R. Khasanov, H. Luetkens, M. H. Fischer, M. Z. Hasan, J. X. Yin, T. NeupertJ. Chang, G. Xu, S. Nakatsuji, E. Pomjakushina, D. J. Gawryluk, Z. Guguchia

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Abstract

The kagome lattice is an intriguing and rich platform for discovering, tuning and understanding the diverse phases of quantum matter, crucial for advancing modern and future electronics. Despite considerable efforts, accessing correlated phases at room temperature has been challenging. Using single-crystal X-ray diffraction, we discovered charge order above room temperature in La(Ru_1−xFe_x)₃Si₂ (x = 0, 0.01, 0.05), where charge order related to out-of-plane Ru atom displacements appears below T_CO,I ≃ 400 K. The secondary charge ordered phase emerges below T_CO,II ≃ 80–170 K. Furthermore, first principles calculations reveal both the kagome flat band and the van Hove point near the Fermi energy in LaRu₃Si₂, driven by Ru-dz² orbitals. Our results identify LaRu₃Si₂ as the kagome superconductor with the highest known charge ordering temperature, offering a promising avenue for researching room temperature quantum phases and developing related technologies.

Original language	English (US)
Article number	182
Journal	Communications Physics
Volume	7
Issue number	1
DOIs	https://doi.org/10.1038/s42005-024-01673-y
State	Published - Dec 2024

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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Plokhikh, I., Mielke, C., Nakamura, H., Petricek, V., Qin, Y., Sazgari, V., Küspert, J., Biało, I., Shin, S., Ivashko, O., Graham, J. N., Zimmermann, M. V., Medarde, M., Amato, A., Khasanov, R., Luetkens, H., Fischer, M. H., Hasan, M. Z., Yin, J. X., ... Guguchia, Z. (2024). Discovery of charge order above room-temperature in the prototypical kagome superconductor La(Ru_1−xFe_x)₃Si₂. Communications Physics, 7(1), Article 182. https://doi.org/10.1038/s42005-024-01673-y

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title = "Discovery of charge order above room-temperature in the prototypical kagome superconductor La(Ru1−xFex)3Si2",

abstract = "The kagome lattice is an intriguing and rich platform for discovering, tuning and understanding the diverse phases of quantum matter, crucial for advancing modern and future electronics. Despite considerable efforts, accessing correlated phases at room temperature has been challenging. Using single-crystal X-ray diffraction, we discovered charge order above room temperature in La(Ru1−xFex)3Si2 (x = 0, 0.01, 0.05), where charge order related to out-of-plane Ru atom displacements appears below TCO,I ≃ 400 K. The secondary charge ordered phase emerges below TCO,II ≃ 80–170 K. Furthermore, first principles calculations reveal both the kagome flat band and the van Hove point near the Fermi energy in LaRu3Si2, driven by Ru-dz2 orbitals. Our results identify LaRu3Si2 as the kagome superconductor with the highest known charge ordering temperature, offering a promising avenue for researching room temperature quantum phases and developing related technologies.",

author = "I. Plokhikh and C. Mielke and H. Nakamura and V. Petricek and Y. Qin and V. Sazgari and J. K{\"u}spert and I. Bia{\l}o and S. Shin and O. Ivashko and Graham, {J. N.} and Zimmermann, {M. V.} and M. Medarde and A. Amato and R. Khasanov and H. Luetkens and Fischer, {M. H.} and Hasan, {M. Z.} and Yin, {J. X.} and T. Neupert and J. Chang and G. Xu and S. Nakatsuji and E. Pomjakushina and Gawryluk, {D. J.} and Z. Guguchia",

note = "Publisher Copyright: {\textcopyright} The Author(s) 2024.",

year = "2024",

month = dec,

doi = "10.1038/s42005-024-01673-y",

language = "English (US)",

volume = "7",

journal = "Communications Physics",

issn = "2399-3650",

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Plokhikh, I, Mielke, C, Nakamura, H, Petricek, V, Qin, Y, Sazgari, V, Küspert, J, Biało, I, Shin, S, Ivashko, O, Graham, JN, Zimmermann, MV, Medarde, M, Amato, A, Khasanov, R, Luetkens, H, Fischer, MH, Hasan, MZ, Yin, JX, Neupert, T, Chang, J, Xu, G, Nakatsuji, S, Pomjakushina, E, Gawryluk, DJ & Guguchia, Z 2024, 'Discovery of charge order above room-temperature in the prototypical kagome superconductor La(Ru_1−xFe_x)₃Si₂', Communications Physics, vol. 7, no. 1, 182. https://doi.org/10.1038/s42005-024-01673-y

TY - JOUR

T1 - Discovery of charge order above room-temperature in the prototypical kagome superconductor La(Ru1−xFex)3Si2

AU - Plokhikh, I.

AU - Mielke, C.

AU - Nakamura, H.

AU - Petricek, V.

AU - Qin, Y.

AU - Sazgari, V.

AU - Küspert, J.

AU - Biało, I.

AU - Shin, S.

AU - Ivashko, O.

AU - Graham, J. N.

AU - Zimmermann, M. V.

AU - Medarde, M.

AU - Amato, A.

AU - Khasanov, R.

AU - Luetkens, H.

AU - Fischer, M. H.

AU - Hasan, M. Z.

AU - Yin, J. X.

AU - Neupert, T.

AU - Chang, J.

AU - Xu, G.

AU - Nakatsuji, S.

AU - Pomjakushina, E.

AU - Gawryluk, D. J.

AU - Guguchia, Z.

PY - 2024/12

Y1 - 2024/12

N2 - The kagome lattice is an intriguing and rich platform for discovering, tuning and understanding the diverse phases of quantum matter, crucial for advancing modern and future electronics. Despite considerable efforts, accessing correlated phases at room temperature has been challenging. Using single-crystal X-ray diffraction, we discovered charge order above room temperature in La(Ru1−xFex)3Si2 (x = 0, 0.01, 0.05), where charge order related to out-of-plane Ru atom displacements appears below TCO,I ≃ 400 K. The secondary charge ordered phase emerges below TCO,II ≃ 80–170 K. Furthermore, first principles calculations reveal both the kagome flat band and the van Hove point near the Fermi energy in LaRu3Si2, driven by Ru-dz2 orbitals. Our results identify LaRu3Si2 as the kagome superconductor with the highest known charge ordering temperature, offering a promising avenue for researching room temperature quantum phases and developing related technologies.

AB - The kagome lattice is an intriguing and rich platform for discovering, tuning and understanding the diverse phases of quantum matter, crucial for advancing modern and future electronics. Despite considerable efforts, accessing correlated phases at room temperature has been challenging. Using single-crystal X-ray diffraction, we discovered charge order above room temperature in La(Ru1−xFex)3Si2 (x = 0, 0.01, 0.05), where charge order related to out-of-plane Ru atom displacements appears below TCO,I ≃ 400 K. The secondary charge ordered phase emerges below TCO,II ≃ 80–170 K. Furthermore, first principles calculations reveal both the kagome flat band and the van Hove point near the Fermi energy in LaRu3Si2, driven by Ru-dz2 orbitals. Our results identify LaRu3Si2 as the kagome superconductor with the highest known charge ordering temperature, offering a promising avenue for researching room temperature quantum phases and developing related technologies.

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UR - http://www.scopus.com/inward/citedby.url?scp=85195653179&partnerID=8YFLogxK

U2 - 10.1038/s42005-024-01673-y

DO - 10.1038/s42005-024-01673-y

M3 - Article

AN - SCOPUS:85195653179

SN - 2399-3650

VL - 7

JO - Communications Physics

JF - Communications Physics

IS - 1

M1 - 182

ER -

Discovery of charge order above room-temperature in the prototypical kagome superconductor La(Ru_1−xFe_x)₃Si₂

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