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

Plokhikh，I.1; Mielke，C.2,3; Nakamura，H.4; Petricek，V.5; Qin，Y.6; Sazgari，V.2; Küspert，J.3; Biało，I.3,7; Shin，S.1; Ivashko，O.8; Graham，J. N.2; Zimmermann，M. V.8; Medarde，M.1; Amato，A.2; Khasanov，R.2; Luetkens，H.2; Fischer，M. H.3; Hasan，M. Z.9; Yin，J. X.10; Neupert，T.3; Chang，J.3; Xu，G.6; Nakatsuji，S.4,11; Pomjakushina，E.1; Gawryluk，D. J.1; Guguchia，Z.2

2024-12-01

10.1038/s42005-024-01673-y

Communications Physics   影响因子和分区

2399-3650

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(RuFe)Si (x = 0, 0.01, 0.05), where charge order related to out-of-plane Ru atom displacements appears below T ≃ 400 K. The secondary charge ordered phase emerges below T ≃ 80–170 K. Furthermore, first principles calculations reveal both the kagome flat band and the van Hove point near the Fermi energy in LaRuSi, driven by Ru-dz orbitals. Our results identify LaRuSi 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.

SCI

英语

其他

2-s2.0-85195653179

Scopus

1.Laboratory for Multiscale Materials Experiments,Paul Scherrer Institut,Villigen,PSI,CH-5232,Switzerland
2.Laboratory for Muon Spin Spectroscopy,Paul Scherrer Institute,Villigen,PSI,CH-5232,Switzerland
3.Physik-Institut,Universität Zürich,Zürich,Winterthurerstrasse 190,CH-8057,Switzerland
4.Institute for Solid State Physics (ISSP),University of Tokyo,Kashiwa,Chiba,277-8581,Japan
5.Institute of Physics CAS,Praha,Na Slovance 1999/2,Czech Republic
6.Wuhan National High Magnetic Field Center and School of Physics,Huazhong University of Science and Technology,Wuhan,430074,China
7.AGH University of Krakow,Faculty of Physics and Applied Computer Science,Kraków,30-059,Poland
8.Deutsches Elektronen-Synchrotron DESY,Hamburg,Notkestraße 85,22607,Germany
9.Laboratory for Topological Quantum Matter and Advanced Spectroscopy (B7),Department of Physics,Princeton University,Princeton,08544,United States
10.Department of Physics,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
11.Department of Physics,University of Tokyo,Bunkyo-ku,Tokyo,113-0033,Japan

Plokhikh，I.,Mielke，C.,Nakamura，H.,et al. Discovery of charge order above room-temperature in the prototypical kagome superconductor La(Ru1−xFex)3Si2[J]. Communications Physics,2024,7(1).

Plokhikh，I..,Mielke，C..,Nakamura，H..,Petricek，V..,Qin，Y..,...&Guguchia，Z..(2024).Discovery of charge order above room-temperature in the prototypical kagome superconductor La(Ru1−xFex)3Si2.Communications Physics,7(1).

Plokhikh，I.,et al."Discovery of charge order above room-temperature in the prototypical kagome superconductor La(Ru1−xFex)3Si2".Communications Physics 7.1(2024).