1
|
Chen Z, Wu X, Zhou S, Zhang J, Yin R, Li Y, Li M, Gong J, He M, Chai Y, Zhou X, Wang Y, Wang A, Yan YJ, Feng DL. Discovery of a long-ranged charge order with 1/4 Ge1-dimerization in an antiferromagnetic Kagome metal. Nat Commun 2024; 15:6262. [PMID: 39048561 PMCID: PMC11269715 DOI: 10.1038/s41467-024-50661-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Accepted: 07/10/2024] [Indexed: 07/27/2024] Open
Abstract
Exotic quantum states arise from the interplay of various degrees of freedom such as charge, spin, orbital, and lattice. Recently, a short-ranged charge order (CO) was discovered deep inside the antiferromagnetic phase of Kagome magnet FeGe, exhibiting close relationships with magnetism. Despite extensive investigations, the CO mechanism remains controversial, mainly because the short-ranged behavior hinders precise identification of CO superstructure. Here, combining multiple experimental techniques, we report the observation of a long-ranged CO in high-quality FeGe samples, which is accompanied with a first-order structural transition. With these high-quality samples, the distorted 2 × 2 × 2 CO superstructure is characterized by a strong dimerization along the c-axis of 1/4 of Ge1-sites in Fe3Ge layers, and in response to that, the 2 × 2 in-plane charge modulations are induced. Moreover, we show that the previously reported short-ranged CO might be related to large occupational disorders at Ge1-site, which upsets the equilibrium of the CO state and the ideal 1 × 1 × 1 structure with very close energies, inducing nanoscale coexistence of these two phases. Our study provides important clues for further understanding the CO properties in FeGe and helps to identify the CO mechanism.
Collapse
Affiliation(s)
- Ziyuan Chen
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Physics, University of Science and Technology of China, Hefei, China
| | - Xueliang Wu
- Low temperature Physics Laboratory, College of Physics and Center of Quantum Materials and Devices, Chongqing University, Chongqing, China
| | - Shiming Zhou
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Physics, University of Science and Technology of China, Hefei, China
| | - Jiakang Zhang
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Physics, University of Science and Technology of China, Hefei, China
| | - Ruotong Yin
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Physics, University of Science and Technology of China, Hefei, China
| | - Yuanji Li
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Physics, University of Science and Technology of China, Hefei, China
| | - Mingzhe Li
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Physics, University of Science and Technology of China, Hefei, China
| | - Jiashuo Gong
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Physics, University of Science and Technology of China, Hefei, China
| | - Mingquan He
- Low temperature Physics Laboratory, College of Physics and Center of Quantum Materials and Devices, Chongqing University, Chongqing, China
| | - Yisheng Chai
- Low temperature Physics Laboratory, College of Physics and Center of Quantum Materials and Devices, Chongqing University, Chongqing, China
| | - Xiaoyuan Zhou
- Low temperature Physics Laboratory, College of Physics and Center of Quantum Materials and Devices, Chongqing University, Chongqing, China
| | - Yilin Wang
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Physics, University of Science and Technology of China, Hefei, China
- National Synchrotron Radiation Laboratory School of Nuclear Science and Technology, and New Cornerstone Science Laboratory, University of Science and Technology of China, Hefei, China
- Hefei National Laboratory, University of Science and Technology of China, Hefei, China
| | - Aifeng Wang
- Low temperature Physics Laboratory, College of Physics and Center of Quantum Materials and Devices, Chongqing University, Chongqing, China.
| | - Ya-Jun Yan
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Physics, University of Science and Technology of China, Hefei, China.
- Hefei National Laboratory, University of Science and Technology of China, Hefei, China.
| | - Dong-Lai Feng
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Physics, University of Science and Technology of China, Hefei, China.
- National Synchrotron Radiation Laboratory School of Nuclear Science and Technology, and New Cornerstone Science Laboratory, University of Science and Technology of China, Hefei, China.
- Hefei National Laboratory, University of Science and Technology of China, Hefei, China.
- Collaborative Innovation Center of Advanced Microstructures, Nanjing, China.
- Shanghai Research Center for Quantum Sciences, Shanghai, China.
| |
Collapse
|
2
|
Zhang YJ, Zhu Y, Li Q, Xiang ZN, Huang T, Sun J, Wen HH. Record-High Superconducting Transition Temperature in a Ti 1-xMn x Alloy with the Rich Magnetic Element Mn. J Am Chem Soc 2024. [PMID: 39036901 DOI: 10.1021/jacs.4c06836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/23/2024]
Abstract
It is well-known that magnetic moments are very harmful to superconductivity. A typical example is the element Mn, whose compounds usually exhibit strong magnetism. Thus, it is very difficult to achieve superconductivity in materials containing Mn. Here, we report enhanced superconductivity with a superconducting transition temperature (Tc) up to a record-high value of about 26 K in a beta-phase Ti1-xMnx alloy containing the rich magnetic element Mn under high pressures. This is contrary to the intuition that magnetic moments always suppress superconductivity. Under high pressures, we also found that in the middle-pressure regime, the Pauli limit of the upper critical field is surpassed. The synchrotron X-ray diffraction data show an unchanged beta-phase with a continuous contraction of the cell volume, which is well-supported by the first-principles calculations. Although the theoretical results based on electron-phonon coupling can interpret the Tc value in a certain pressure region, the monotonic enhancement of superconductivity by pressure cannot seek support from the theory. Our results show a surprising enhancement of superconductivity in the Ti1-xMnx alloy with a considerable Mn content.
Collapse
Affiliation(s)
- Ying-Jie Zhang
- National Laboratory of Solid State Microstructures and Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| | - Yijie Zhu
- National Laboratory of Solid State Microstructures and Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| | - Qing Li
- National Laboratory of Solid State Microstructures and Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| | - Zhe-Ning Xiang
- National Laboratory of Solid State Microstructures and Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| | - Tianheng Huang
- National Laboratory of Solid State Microstructures and Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| | - Jian Sun
- National Laboratory of Solid State Microstructures and Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| | - Hai-Hu Wen
- National Laboratory of Solid State Microstructures and Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| |
Collapse
|
3
|
Zhu Y, Peng D, Zhang E, Pan B, Chen X, Chen L, Ren H, Liu F, Hao Y, Li N, Xing Z, Lan F, Han J, Wang J, Jia D, Wo H, Gu Y, Gu Y, Ji L, Wang W, Gou H, Shen Y, Ying T, Chen X, Yang W, Cao H, Zheng C, Zeng Q, Guo JG, Zhao J. Superconductivity in pressurized trilayer La 4Ni 3O 10-δ single crystals. Nature 2024; 631:531-536. [PMID: 39020034 DOI: 10.1038/s41586-024-07553-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Accepted: 05/09/2024] [Indexed: 07/19/2024]
Abstract
The pursuit of discovering new high-temperature superconductors that diverge from the copper-based model1-3 has profound implications for explaining mechanisms behind superconductivity and may also enable new applications4-8. Here our investigation shows that the application of pressure effectively suppresses the spin-charge order in trilayer nickelate La4Ni3O10-δ single crystals, leading to the emergence of superconductivity with a maximum critical temperature (Tc) of around 30 K at 69.0 GPa. The d.c. susceptibility measurements confirm a substantial diamagnetic response below Tc, indicating the presence of bulk superconductivity with a volume fraction exceeding 80%. In the normal state, we observe a strange metal behaviour, characterized by a linear temperature-dependent resistance extending up to 300 K. Furthermore, the layer-dependent superconductivity observed hints at a unique interlayer coupling mechanism specific to nickelates, setting them apart from cuprates in this regard. Our findings provide crucial insights into the fundamental mechanisms underpinning superconductivity, while also introducing a new material platform to explore the intricate interplay between the spin-charge order, flat band structures, interlayer coupling, strange metal behaviour and high-temperature superconductivity.
Collapse
Affiliation(s)
- Yinghao Zhu
- State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai, China
- Shanghai Research Center for Quantum Sciences, Shanghai, China
| | - Di Peng
- Shanghai Key Laboratory of Material Frontiers Research in Extreme Environments (MFree), Institute for Shanghai Advanced Research in Physical Sciences (SHARPS), Shanghai, China
| | - Enkang Zhang
- State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai, China
| | - Bingying Pan
- College of Physics and Optoelectronic Engineering, Ocean University of China, Qingdao, China
| | - Xu Chen
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, China
| | - Lixing Chen
- State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai, China
| | - Huifen Ren
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, China
| | - Feiyang Liu
- State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai, China
| | - Yiqing Hao
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - Nana Li
- Center for High Pressure Science and Technology Advanced Research, Shanghai, China
| | - Zhenfang Xing
- Center for High Pressure Science and Technology Advanced Research, Shanghai, China
| | - Fujun Lan
- Center for High Pressure Science and Technology Advanced Research, Shanghai, China
| | - Jiyuan Han
- State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai, China
| | - Junjie Wang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Donghan Jia
- Center for High Pressure Science and Technology Advanced Research, Beijing, China
| | - Hongliang Wo
- State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai, China
| | - Yiqing Gu
- State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai, China
| | - Yimeng Gu
- State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai, China
| | - Li Ji
- State Key Laboratory of ASIC and System, School of Microelectronics, Fudan University, Shanghai, China
| | - Wenbin Wang
- Institute of Nanoelectronics and Quantum Computing, Fudan University, Shanghai, China
| | - Huiyang Gou
- Center for High Pressure Science and Technology Advanced Research, Beijing, China
| | - Yao Shen
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, China
| | - Tianping Ying
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, China
| | - Xiaolong Chen
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, China
| | - Wenge Yang
- Center for High Pressure Science and Technology Advanced Research, Shanghai, China
| | - Huibo Cao
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - Changlin Zheng
- State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai, China
| | - Qiaoshi Zeng
- Shanghai Key Laboratory of Material Frontiers Research in Extreme Environments (MFree), Institute for Shanghai Advanced Research in Physical Sciences (SHARPS), Shanghai, China.
- Center for High Pressure Science and Technology Advanced Research, Shanghai, China.
| | - Jian-Gang Guo
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, China.
| | - Jun Zhao
- State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai, China.
- Shanghai Research Center for Quantum Sciences, Shanghai, China.
- Institute of Nanoelectronics and Quantum Computing, Fudan University, Shanghai, China.
- Shanghai Branch, Hefei National Laboratory, Shanghai, China.
| |
Collapse
|
4
|
Chen X, Zhang J, Thind AS, Sharma S, LaBollita H, Peterson G, Zheng H, Phelan DP, Botana AS, Klie RF, Mitchell JF. Polymorphism in the Ruddlesden-Popper Nickelate La 3Ni 2O 7: Discovery of a Hidden Phase with Distinctive Layer Stacking. J Am Chem Soc 2024; 146:3640-3645. [PMID: 38294831 DOI: 10.1021/jacs.3c14052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2024]
Abstract
We report the discovery of a novel form of Ruddlesden-Popper (RP) nickelate that stands as the first example of long-range, coherent polymorphism in this class of inorganic solids. Rather than the well-known, uniform stacking of perovskite blocks ubiquitously found in RP phases, this newly discovered polymorph of the bilayer RP phase La3Ni2O7 adopts a novel stacking sequence in which single-layer and trilayer blocks of NiO6 octahedra alternate in a "1313" sequence. Crystals of this new polymorph are described in space group Cmmm, although we note evidence for a competing Imam variant. Transport measurements at ambient pressure reveal metallic character with evidence of a charge density wave transition with an onset at T ≈ 134 K. The discovery of such polymorphism could reverberate to the expansive range of science and applications that rely on RP materials, particularly the recently reported signatures of superconductivity in bilayer La3Ni2O7 with Tc as high as 80 K above 14 GPa.
Collapse
Affiliation(s)
- Xinglong Chen
- Materials Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Junjie Zhang
- Materials Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Arashdeep S Thind
- Department of Physics, University of Illinois─Chicago, Chicago, Illinois 60607, United States
| | - Shekhar Sharma
- Department of Physics and Astronomy, Arizona State University, Tempe, Arizona 85218, United States
| | - Harrison LaBollita
- Department of Physics and Astronomy, Arizona State University, Tempe, Arizona 85218, United States
| | - Gordon Peterson
- Materials Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Hong Zheng
- Materials Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Daniel P Phelan
- Materials Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Antia S Botana
- Department of Physics and Astronomy, Arizona State University, Tempe, Arizona 85218, United States
| | - Robert F Klie
- Department of Physics, University of Illinois─Chicago, Chicago, Illinois 60607, United States
| | - J F Mitchell
- Materials Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| |
Collapse
|
5
|
Discovery of charge density wave in a kagome lattice antiferromagnet. Nature 2022; 609:490-495. [PMID: 36104552 DOI: 10.1038/s41586-022-05034-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2022] [Accepted: 06/28/2022] [Indexed: 11/08/2022]
Abstract
A hallmark of strongly correlated quantum materials is the rich phase diagram resulting from competing and intertwined phases with nearly degenerate ground-state energies1,2. A well-known example is the copper oxides, in which a charge density wave (CDW) is ordered well above and strongly coupled to the magnetic order to form spin-charge-separated stripes that compete with superconductivity1,2. Recently, such rich phase diagrams have also been shown in correlated topological materials. In 2D kagome lattice metals consisting of corner-sharing triangles, the geometry of the lattice can produce flat bands with localized electrons3,4, non-trivial topology5-7, chiral magnetic order8,9, superconductivity and CDW order10-15. Although CDW has been found in weakly electron-correlated non-magnetic AV3Sb5 (A = K, Rb, Cs)10-15, it has not yet been observed in correlated magnetic-ordered kagome lattice metals4,16-21. Here we report the discovery of CDW in the antiferromagnetic (AFM) ordered phase of kagome lattice FeGe (refs. 16-19). The CDW in FeGe occurs at wavevectors identical to that of AV3Sb5 (refs. 10-15), enhances the AFM ordered moment and induces an emergent anomalous Hall effect22,23. Our findings suggest that CDW in FeGe arises from the combination of electron-correlations-driven AFM order and van Hove singularities (vHSs)-driven instability possibly associated with a chiral flux phase24-28, in stark contrast to strongly correlated copper oxides1,2 and nickelates29-31, in which the CDW precedes or accompanies the magnetic order.
Collapse
|
6
|
Abstract
Quasi-2D square planar nickelates exhibit key ingredients of high-Tc superconducting cuprates. Whether bulk samples are superconducting remains an open question, single crystals are ideal platforms for addressing such fundamental questions.
Collapse
Affiliation(s)
- Junjie Zhang
- Institute of Crystal Materials
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan
- China
| | - Xutang Tao
- Institute of Crystal Materials
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan
- China
| |
Collapse
|